diff options
49 files changed, 699 insertions, 596 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 52e664b5a68d..f3a5c97e3419 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2633,6 +2633,13 @@ S: Maintained F: Documentation/devicetree/bindings/sound/axentia,* F: sound/soc/atmel/tse850-pcm5142.c +AXXIA I2C CONTROLLER +M: Krzysztof Adamski <krzysztof.adamski@nokia.com> +L: linux-i2c@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/i2c/i2c-axxia.txt +F: drivers/i2c/busses/i2c-axxia.c + AZ6007 DVB DRIVER M: Mauro Carvalho Chehab <mchehab@kernel.org> L: linux-media@vger.kernel.org @@ -1076,7 +1076,7 @@ scripts: scripts_basic scripts_dtc asm-generic gcc-plugins $(autoksyms_h) # version.h and scripts_basic is processed / created. # Listed in dependency order -PHONY += prepare archprepare macroprepare prepare0 prepare1 prepare2 prepare3 +PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 # prepare3 is used to check if we are building in a separate output directory, # and if so do: @@ -1099,9 +1099,7 @@ prepare2: prepare3 outputmakefile asm-generic prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h $(cmd_crmodverdir) -macroprepare: prepare1 archmacros - -archprepare: archheaders archscripts macroprepare scripts_basic +archprepare: archheaders archscripts prepare1 scripts_basic prepare0: archprepare gcc-plugins $(Q)$(MAKE) $(build)=. @@ -1177,9 +1175,6 @@ archheaders: PHONY += archscripts archscripts: -PHONY += archmacros -archmacros: - PHONY += __headers __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts $(Q)$(MAKE) $(build)=scripts build_unifdef diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 75ef499a66e2..85a66c4a8b65 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -232,13 +232,6 @@ archscripts: scripts_basic archheaders: $(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all -archmacros: - $(Q)$(MAKE) $(build)=arch/x86/kernel arch/x86/kernel/macros.s - -ASM_MACRO_FLAGS = -Wa,arch/x86/kernel/macros.s -export ASM_MACRO_FLAGS -KBUILD_CFLAGS += $(ASM_MACRO_FLAGS) - ### # Kernel objects diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h index 25e5a6bda8c3..20d0885b00fb 100644 --- a/arch/x86/entry/calling.h +++ b/arch/x86/entry/calling.h @@ -352,7 +352,7 @@ For 32-bit we have the following conventions - kernel is built with .macro CALL_enter_from_user_mode #ifdef CONFIG_CONTEXT_TRACKING #ifdef HAVE_JUMP_LABEL - STATIC_BRANCH_JMP l_yes=.Lafter_call_\@, key=context_tracking_enabled, branch=1 + STATIC_JUMP_IF_FALSE .Lafter_call_\@, context_tracking_enabled, def=0 #endif call enter_from_user_mode .Lafter_call_\@: diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile index 0624bf2266fd..5bfe2243a08f 100644 --- a/arch/x86/entry/vdso/Makefile +++ b/arch/x86/entry/vdso/Makefile @@ -171,7 +171,8 @@ quiet_cmd_vdso = VDSO $@ sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@' VDSO_LDFLAGS = -shared $(call ld-option, --hash-style=both) \ - $(call ld-option, --build-id) -Bsymbolic + $(call ld-option, --build-id) $(call ld-option, --eh-frame-hdr) \ + -Bsymbolic GCOV_PROFILE := n # diff --git a/arch/x86/include/asm/alternative-asm.h b/arch/x86/include/asm/alternative-asm.h index 8e4ea39e55d0..31b627b43a8e 100644 --- a/arch/x86/include/asm/alternative-asm.h +++ b/arch/x86/include/asm/alternative-asm.h @@ -7,24 +7,16 @@ #include <asm/asm.h> #ifdef CONFIG_SMP -.macro LOCK_PREFIX_HERE + .macro LOCK_PREFIX +672: lock .pushsection .smp_locks,"a" .balign 4 - .long 671f - . # offset + .long 672b - . .popsection -671: -.endm - -.macro LOCK_PREFIX insn:vararg - LOCK_PREFIX_HERE - lock \insn -.endm + .endm #else -.macro LOCK_PREFIX_HERE -.endm - -.macro LOCK_PREFIX insn:vararg -.endm + .macro LOCK_PREFIX + .endm #endif /* diff --git a/arch/x86/include/asm/alternative.h b/arch/x86/include/asm/alternative.h index d7faa16622d8..4cd6a3b71824 100644 --- a/arch/x86/include/asm/alternative.h +++ b/arch/x86/include/asm/alternative.h @@ -31,8 +31,15 @@ */ #ifdef CONFIG_SMP -#define LOCK_PREFIX_HERE "LOCK_PREFIX_HERE\n\t" -#define LOCK_PREFIX "LOCK_PREFIX " +#define LOCK_PREFIX_HERE \ + ".pushsection .smp_locks,\"a\"\n" \ + ".balign 4\n" \ + ".long 671f - .\n" /* offset */ \ + ".popsection\n" \ + "671:" + +#define LOCK_PREFIX LOCK_PREFIX_HERE "\n\tlock; " + #else /* ! CONFIG_SMP */ #define LOCK_PREFIX_HERE "" #define LOCK_PREFIX "" diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h index 21b086786404..6467757bb39f 100644 --- a/arch/x86/include/asm/asm.h +++ b/arch/x86/include/asm/asm.h @@ -120,25 +120,12 @@ /* Exception table entry */ #ifdef __ASSEMBLY__ # define _ASM_EXTABLE_HANDLE(from, to, handler) \ - ASM_EXTABLE_HANDLE from to handler - -.macro ASM_EXTABLE_HANDLE from:req to:req handler:req - .pushsection "__ex_table","a" - .balign 4 - .long (\from) - . - .long (\to) - . - .long (\handler) - . + .pushsection "__ex_table","a" ; \ + .balign 4 ; \ + .long (from) - . ; \ + .long (to) - . ; \ + .long (handler) - . ; \ .popsection -.endm -#else /* __ASSEMBLY__ */ - -# define _ASM_EXTABLE_HANDLE(from, to, handler) \ - "ASM_EXTABLE_HANDLE from=" #from " to=" #to \ - " handler=\"" #handler "\"\n\t" - -/* For C file, we already have NOKPROBE_SYMBOL macro */ - -#endif /* __ASSEMBLY__ */ # define _ASM_EXTABLE(from, to) \ _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) @@ -161,7 +148,6 @@ _ASM_PTR (entry); \ .popsection -#ifdef __ASSEMBLY__ .macro ALIGN_DESTINATION /* check for bad alignment of destination */ movl %edi,%ecx @@ -185,7 +171,34 @@ _ASM_EXTABLE_UA(100b, 103b) _ASM_EXTABLE_UA(101b, 103b) .endm -#endif /* __ASSEMBLY__ */ + +#else +# define _EXPAND_EXTABLE_HANDLE(x) #x +# define _ASM_EXTABLE_HANDLE(from, to, handler) \ + " .pushsection \"__ex_table\",\"a\"\n" \ + " .balign 4\n" \ + " .long (" #from ") - .\n" \ + " .long (" #to ") - .\n" \ + " .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n" \ + " .popsection\n" + +# define _ASM_EXTABLE(from, to) \ + _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) + +# define _ASM_EXTABLE_UA(from, to) \ + _ASM_EXTABLE_HANDLE(from, to, ex_handler_uaccess) + +# define _ASM_EXTABLE_FAULT(from, to) \ + _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) + +# define _ASM_EXTABLE_EX(from, to) \ + _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext) + +# define _ASM_EXTABLE_REFCOUNT(from, to) \ + _ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount) + +/* For C file, we already have NOKPROBE_SYMBOL macro */ +#endif #ifndef __ASSEMBLY__ /* diff --git a/arch/x86/include/asm/bug.h b/arch/x86/include/asm/bug.h index 5090035e6d16..6804d6642767 100644 --- a/arch/x86/include/asm/bug.h +++ b/arch/x86/include/asm/bug.h @@ -4,8 +4,6 @@ #include <linux/stringify.h> -#ifndef __ASSEMBLY__ - /* * Despite that some emulators terminate on UD2, we use it for WARN(). * @@ -22,15 +20,53 @@ #define LEN_UD2 2 +#ifdef CONFIG_GENERIC_BUG + +#ifdef CONFIG_X86_32 +# define __BUG_REL(val) ".long " __stringify(val) +#else +# define __BUG_REL(val) ".long " __stringify(val) " - 2b" +#endif + +#ifdef CONFIG_DEBUG_BUGVERBOSE + +#define _BUG_FLAGS(ins, flags) \ +do { \ + asm volatile("1:\t" ins "\n" \ + ".pushsection __bug_table,\"aw\"\n" \ + "2:\t" __BUG_REL(1b) "\t# bug_entry::bug_addr\n" \ + "\t" __BUG_REL(%c0) "\t# bug_entry::file\n" \ + "\t.word %c1" "\t# bug_entry::line\n" \ + "\t.word %c2" "\t# bug_entry::flags\n" \ + "\t.org 2b+%c3\n" \ + ".popsection" \ + : : "i" (__FILE__), "i" (__LINE__), \ + "i" (flags), \ + "i" (sizeof(struct bug_entry))); \ +} while (0) + +#else /* !CONFIG_DEBUG_BUGVERBOSE */ + #define _BUG_FLAGS(ins, flags) \ do { \ - asm volatile("ASM_BUG ins=\"" ins "\" file=%c0 line=%c1 " \ - "flags=%c2 size=%c3" \ - : : "i" (__FILE__), "i" (__LINE__), \ - "i" (flags), \ + asm volatile("1:\t" ins "\n" \ + ".pushsection __bug_table,\"aw\"\n" \ + "2:\t" __BUG_REL(1b) "\t# bug_entry::bug_addr\n" \ + "\t.word %c0" "\t# bug_entry::flags\n" \ + "\t.org 2b+%c1\n" \ + ".popsection" \ + : : "i" (flags), \ "i" (sizeof(struct bug_entry))); \ } while (0) +#endif /* CONFIG_DEBUG_BUGVERBOSE */ + +#else + +#define _BUG_FLAGS(ins, flags) asm volatile(ins) + +#endif /* CONFIG_GENERIC_BUG */ + #define HAVE_ARCH_BUG #define BUG() \ do { \ @@ -46,54 +82,4 @@ do { \ #include <asm-generic/bug.h> -#else /* __ASSEMBLY__ */ - -#ifdef CONFIG_GENERIC_BUG - -#ifdef CONFIG_X86_32 -.macro __BUG_REL val:req - .long \val -.endm -#else -.macro __BUG_REL val:req - .long \val - 2b -.endm -#endif - -#ifdef CONFIG_DEBUG_BUGVERBOSE - -.macro ASM_BUG ins:req file:req line:req flags:req size:req -1: \ins - .pushsection __bug_table,"aw" -2: __BUG_REL val=1b # bug_entry::bug_addr - __BUG_REL val=\file # bug_entry::file - .word \line # bug_entry::line - .word \flags # bug_entry::flags - .org 2b+\size - .popsection -.endm - -#else /* !CONFIG_DEBUG_BUGVERBOSE */ - -.macro ASM_BUG ins:req file:req line:req flags:req size:req -1: \ins - .pushsection __bug_table,"aw" -2: __BUG_REL val=1b # bug_entry::bug_addr - .word \flags # bug_entry::flags - .org 2b+\size - .popsection -.endm - -#endif /* CONFIG_DEBUG_BUGVERBOSE */ - -#else /* CONFIG_GENERIC_BUG */ - -.macro ASM_BUG ins:req file:req line:req flags:req size:req - \ins -.endm - -#endif /* CONFIG_GENERIC_BUG */ - -#endif /* __ASSEMBLY__ */ - #endif /* _ASM_X86_BUG_H */ diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h index 7d442722ef24..aced6c9290d6 100644 --- a/arch/x86/include/asm/cpufeature.h +++ b/arch/x86/include/asm/cpufeature.h @@ -2,10 +2,10 @@ #ifndef _ASM_X86_CPUFEATURE_H #define _ASM_X86_CPUFEATURE_H -#ifdef __KERNEL__ -#ifndef __ASSEMBLY__ - #include <asm/processor.h> + +#if defined(__KERNEL__) && !defined(__ASSEMBLY__) + #include <asm/asm.h> #include <linux/bitops.h> @@ -161,10 +161,37 @@ extern void clear_cpu_cap(struct cpuinfo_x86 *c, unsigned int bit); */ static __always_inline __pure bool _static_cpu_has(u16 bit) { - asm_volatile_goto("STATIC_CPU_HAS bitnum=%[bitnum] " - "cap_byte=\"%[cap_byte]\" " - "feature=%P[feature] t_yes=%l[t_yes] " - "t_no=%l[t_no] always=%P[always]" + asm_volatile_goto("1: jmp 6f\n" + "2:\n" + ".skip -(((5f-4f) - (2b-1b)) > 0) * " + "((5f-4f) - (2b-1b)),0x90\n" + "3:\n" + ".section .altinstructions,\"a\"\n" + " .long 1b - .\n" /* src offset */ + " .long 4f - .\n" /* repl offset */ + " .word %P[always]\n" /* always replace */ + " .byte 3b - 1b\n" /* src len */ + " .byte 5f - 4f\n" /* repl len */ + " .byte 3b - 2b\n" /* pad len */ + ".previous\n" + ".section .altinstr_replacement,\"ax\"\n" + "4: jmp %l[t_no]\n" + "5:\n" + ".previous\n" + ".section .altinstructions,\"a\"\n" + " .long 1b - .\n" /* src offset */ + " .long 0\n" /* no replacement */ + " .word %P[feature]\n" /* feature bit */ + " .byte 3b - 1b\n" /* src len */ + " .byte 0\n" /* repl len */ + " .byte 0\n" /* pad len */ + ".previous\n" + ".section .altinstr_aux,\"ax\"\n" + "6:\n" + " testb %[bitnum],%[cap_byte]\n" + " jnz %l[t_yes]\n" + " jmp %l[t_no]\n" + ".previous\n" : : [feature] "i" (bit), [always] "i" (X86_FEATURE_ALWAYS), [bitnum] "i" (1 << (bit & 7)), @@ -199,44 +226,5 @@ t_no: #define CPU_FEATURE_TYPEVAL boot_cpu_data.x86_vendor, boot_cpu_data.x86, \ boot_cpu_data.x86_model -#else /* __ASSEMBLY__ */ - -.macro STATIC_CPU_HAS bitnum:req cap_byte:req feature:req t_yes:req t_no:req always:req -1: - jmp 6f -2: - .skip -(((5f-4f) - (2b-1b)) > 0) * ((5f-4f) - (2b-1b)),0x90 -3: - .section .altinstructions,"a" - .long 1b - . /* src offset */ - .long 4f - . /* repl offset */ - .word \always /* always replace */ - .byte 3b - 1b /* src len */ - .byte 5f - 4f /* repl len */ - .byte 3b - 2b /* pad len */ - .previous - .section .altinstr_replacement,"ax" -4: - jmp \t_no -5: - .previous - .section .altinstructions,"a" - .long 1b - . /* src offset */ - .long 0 /* no replacement */ - .word \feature /* feature bit */ - .byte 3b - 1b /* src len */ - .byte 0 /* repl len */ - .byte 0 /* pad len */ - .previous - .section .altinstr_aux,"ax" -6: - testb \bitnum,\cap_byte - jnz \t_yes - jmp \t_no - .previous -.endm - -#endif /* __ASSEMBLY__ */ - -#endif /* __KERNEL__ */ +#endif /* defined(__KERNEL__) && !defined(__ASSEMBLY__) */ #endif /* _ASM_X86_CPUFEATURE_H */ diff --git a/arch/x86/include/asm/fsgsbase.h b/arch/x86/include/asm/fsgsbase.h index eb377b6e9eed..bca4c743de77 100644 --- a/arch/x86/include/asm/fsgsbase.h +++ b/arch/x86/include/asm/fsgsbase.h @@ -16,8 +16,8 @@ */ extern unsigned long x86_fsbase_read_task(struct task_struct *task); extern unsigned long x86_gsbase_read_task(struct task_struct *task); -extern int x86_fsbase_write_task(struct task_struct *task, unsigned long fsbase); -extern int x86_gsbase_write_task(struct task_struct *task, unsigned long gsbase); +extern void x86_fsbase_write_task(struct task_struct *task, unsigned long fsbase); +extern void x86_gsbase_write_task(struct task_struct *task, unsigned long gsbase); /* Helper functions for reading/writing FS/GS base */ @@ -39,8 +39,15 @@ static inline unsigned long x86_gsbase_read_cpu_inactive(void) return gsbase; } -extern void x86_fsbase_write_cpu(unsigned long fsbase); -extern void x86_gsbase_write_cpu_inactive(unsigned long gsbase); +static inline void x86_fsbase_write_cpu(unsigned long fsbase) +{ + wrmsrl(MSR_FS_BASE, fsbase); +} + +static inline void x86_gsbase_write_cpu_inactive(unsigned long gsbase) +{ + wrmsrl(MSR_KERNEL_GS_BASE, gsbase); +} #endif /* CONFIG_X86_64 */ diff --git a/arch/x86/include/asm/jump_label.h b/arch/x86/include/asm/jump_label.h index a5fb34fe56a4..21efc9d07ed9 100644 --- a/arch/x86/include/asm/jump_label.h +++ b/arch/x86/include/asm/jump_label.h @@ -2,6 +2,19 @@ #ifndef _ASM_X86_JUMP_LABEL_H #define _ASM_X86_JUMP_LABEL_H +#ifndef HAVE_JUMP_LABEL +/* + * For better or for worse, if jump labels (the gcc extension) are missing, + * then the entire static branch patching infrastructure is compiled out. + * If that happens, the code in here will malfunction. Raise a compiler + * error instead. + * + * In theory, jump labels and the static branch patching infrastructure + * could be decoupled to fix this. + */ +#error asm/jump_label.h included on a non-jump-label kernel +#endif + #define JUMP_LABEL_NOP_SIZE 5 #ifdef CONFIG_X86_64 @@ -20,9 +33,15 @@ static __always_inline bool arch_static_branch(struct static_key *key, bool branch) { - asm_volatile_goto("STATIC_BRANCH_NOP l_yes=\"%l[l_yes]\" key=\"%c0\" " - "branch=\"%c1\"" - : : "i" (key), "i" (branch) : : l_yes); + asm_volatile_goto("1:" + ".byte " __stringify(STATIC_KEY_INIT_NOP) "\n\t" + ".pushsection __jump_table, \"aw\" \n\t" + _ASM_ALIGN "\n\t" + ".long 1b - ., %l[l_yes] - . \n\t" + _ASM_PTR "%c0 + %c1 - .\n\t" + ".popsection \n\t" + : : "i" (key), "i" (branch) : : l_yes); + return false; l_yes: return true; @@ -30,8 +49,14 @@ l_yes: static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch) { - asm_volatile_goto("STATIC_BRANCH_JMP l_yes=\"%l[l_yes]\" key=\"%c0\" " - "branch=\"%c1\"" + asm_volatile_goto("1:" + ".byte 0xe9\n\t .long %l[l_yes] - 2f\n\t" + "2:\n\t" + ".pushsection __jump_table, \"aw\" \n\t" + _ASM_ALIGN "\n\t" + ".long 1b - ., %l[l_yes] - . \n\t" + _ASM_PTR "%c0 + %c1 - .\n\t" + ".popsection \n\t" : : "i" (key), "i" (branch) : : l_yes); return false; @@ -41,26 +66,37 @@ l_yes: #else /* __ASSEMBLY__ */ -.macro STATIC_BRANCH_NOP l_yes:req key:req branch:req -.Lstatic_branch_nop_\@: - .byte STATIC_KEY_INIT_NOP -.Lstatic_branch_no_after_\@: +.macro STATIC_JUMP_IF_TRUE target, key, def +.Lstatic_jump_\@: + .if \def + /* Equivalent to "jmp.d32 \target" */ + .byte 0xe9 + .long \target - .Lstatic_jump_after_\@ +.Lstatic_jump_after_\@: + .else + .byte STATIC_KEY_INIT_NOP + .endif .pushsection __jump_table, "aw" _ASM_ALIGN - .long .Lstatic_branch_nop_\@ - ., \l_yes - . - _ASM_PTR \key + \branch - . + .long .Lstatic_jump_\@ - ., \target - . + _ASM_PTR \key - . .popsection .endm -.macro STATIC_BRANCH_JMP l_yes:req key:req branch:req -.Lstatic_branch_jmp_\@: - .byte 0xe9 - .long \l_yes - .Lstatic_branch_jmp_after_\@ -.Lstatic_branch_jmp_after_\@: +.macro STATIC_JUMP_IF_FALSE target, key, def +.Lstatic_jump_\@: + .if \def + .byte STATIC_KEY_INIT_NOP + .else + /* Equivalent to "jmp.d32 \target" */ + .byte 0xe9 + .long \target - .Lstatic_jump_after_\@ +.Lstatic_jump_after_\@: + .endif .pushsection __jump_table, "aw" _ASM_ALIGN - .long .Lstatic_branch_jmp_\@ - ., \l_yes - . - _ASM_PTR \key + \branch - . + .long .Lstatic_jump_\@ - ., \target - . + _ASM_PTR \key + 1 - . .popsection .endm diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 26942ad63830..488c59686a73 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -348,11 +348,23 @@ extern struct paravirt_patch_template pv_ops; #define paravirt_clobber(clobber) \ [paravirt_clobber] "i" (clobber) +/* + * Generate some code, and mark it as patchable by the + * apply_paravirt() alternate instruction patcher. + */ +#define _paravirt_alt(insn_string, type, clobber) \ + "771:\n\t" insn_string "\n" "772:\n" \ + ".pushsection .parainstructions,\"a\"\n" \ + _ASM_ALIGN "\n" \ + _ASM_PTR " 771b\n" \ + " .byte " type "\n" \ + " .byte 772b-771b\n" \ + " .short " clobber "\n" \ + ".popsection\n" + /* Generate patchable code, with the default asm parameters. */ -#define paravirt_call \ - "PARAVIRT_CALL type=\"%c[paravirt_typenum]\"" \ - " clobber=\"%c[paravirt_clobber]\"" \ - " pv_opptr=\"%c[paravirt_opptr]\";" +#define paravirt_alt(insn_string) \ + _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]") /* Simple instruction patching code. */ #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t" @@ -373,6 +385,16 @@ unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len); int paravirt_disable_iospace(void); /* + * This generates an indirect call based on the operation type number. + * The type number, computed in PARAVIRT_PATCH, is derived from the + * offset into the paravirt_patch_template structure, and can therefore be + * freely converted back into a structure offset. + */ +#define PARAVIRT_CALL \ + ANNOTATE_RETPOLINE_SAFE \ + "call *%c[paravirt_opptr];" + +/* * These macros are intended to wrap calls through one of the paravirt * ops structs, so that they can be later identified and patched at * runtime. @@ -509,7 +531,7 @@ int paravirt_disable_iospace(void); /* since this condition will never hold */ \ if (sizeof(rettype) > sizeof(unsigned long)) { \ asm volatile(pre \ - paravirt_call \ + paravirt_alt(PARAVIRT_CALL) \ post \ : call_clbr, ASM_CALL_CONSTRAINT \ : paravirt_type(op), \ @@ -519,7 +541,7 @@ int paravirt_disable_iospace(void); __ret = (rettype)((((u64)__edx) << 32) | __eax); \ } else { \ asm volatile(pre \ - paravirt_call \ + paravirt_alt(PARAVIRT_CALL) \ post \ : call_clbr, ASM_CALL_CONSTRAINT \ : paravirt_type(op), \ @@ -546,7 +568,7 @@ int paravirt_disable_iospace(void); PVOP_VCALL_ARGS; \ PVOP_TEST_NULL(op); \ asm volatile(pre \ - paravirt_call \ + paravirt_alt(PARAVIRT_CALL) \ post \ : call_clbr, ASM_CALL_CONSTRAINT \ : paravirt_type(op), \ @@ -664,26 +686,6 @@ struct paravirt_patch_site { extern struct paravirt_patch_site __parainstructions[], __parainstructions_end[]; -#else /* __ASSEMBLY__ */ - -/* - * This generates an indirect call based on the operation type number. - * The type number, computed in PARAVIRT_PATCH, is derived from the - * offset into the paravirt_patch_template structure, and can therefore be - * freely converted back into a structure offset. - */ -.macro PARAVIRT_CALL type:req clobber:req pv_opptr:req -771: ANNOTATE_RETPOLINE_SAFE - call *\pv_opptr -772: .pushsection .parainstructions,"a" - _ASM_ALIGN - _ASM_PTR 771b - .byte \type - .byte 772b-771b - .short \clobber - .popsection -.endm - #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_PARAVIRT_TYPES_H */ diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h index 84bd9bdc1987..88bca456da99 100644 --- a/arch/x86/include/asm/pgtable_64_types.h +++ b/arch/x86/include/asm/pgtable_64_types.h @@ -111,6 +111,11 @@ extern unsigned int ptrs_per_p4d; */ #define MAXMEM (1UL << MAX_PHYSMEM_BITS) +#define GUARD_HOLE_PGD_ENTRY -256UL +#define GUARD_HOLE_SIZE (16UL << PGDIR_SHIFT) +#define GUARD_HOLE_BASE_ADDR (GUARD_HOLE_PGD_ENTRY << PGDIR_SHIFT) +#define GUARD_HOLE_END_ADDR (GUARD_HOLE_BASE_ADDR + GUARD_HOLE_SIZE) + #define LDT_PGD_ENTRY -240UL #define LDT_BASE_ADDR (LDT_PGD_ENTRY << PGDIR_SHIFT) #define LDT_END_ADDR (LDT_BASE_ADDR + PGDIR_SIZE) diff --git a/arch/x86/include/asm/refcount.h b/arch/x86/include/asm/refcount.h index a8b5e1e13319..dbaed55c1c24 100644 --- a/arch/x86/include/asm/refcount.h +++ b/arch/x86/include/asm/refcount.h @@ -4,41 +4,6 @@ * x86-specific implementation of refcount_t. Based on PAX_REFCOUNT from * PaX/grsecurity. */ - -#ifdef __ASSEMBLY__ - -#include <asm/asm.h> -#include <asm/bug.h> - -.macro REFCOUNT_EXCEPTION counter:req - .pushsection .text..refcount -111: lea \counter, %_ASM_CX -112: ud2 - ASM_UNREACHABLE - .popsection -113: _ASM_EXTABLE_REFCOUNT(112b, 113b) -.endm - -/* Trigger refcount exception if refcount result is negative. */ -.macro REFCOUNT_CHECK_LT_ZERO counter:req - js 111f - REFCOUNT_EXCEPTION counter="\counter" -.endm - -/* Trigger refcount exception if refcount result is zero or negative. */ -.macro REFCOUNT_CHECK_LE_ZERO counter:req - jz 111f - REFCOUNT_CHECK_LT_ZERO counter="\counter" -.endm - -/* Trigger refcount exception unconditionally. */ -.macro REFCOUNT_ERROR counter:req - jmp 111f - REFCOUNT_EXCEPTION counter="\counter" -.endm - -#else /* __ASSEMBLY__ */ - #include <linux/refcount.h> #include <asm/bug.h> @@ -50,12 +15,35 @@ * central refcount exception. The fixup address for the exception points * back to the regular execution flow in .text. */ +#define _REFCOUNT_EXCEPTION \ + ".pushsection .text..refcount\n" \ + "111:\tlea %[var], %%" _ASM_CX "\n" \ + "112:\t" ASM_UD2 "\n" \ + ASM_UNREACHABLE \ + ".popsection\n" \ + "113:\n" \ + _ASM_EXTABLE_REFCOUNT(112b, 113b) + +/* Trigger refcount exception if refcount result is negative. */ +#define REFCOUNT_CHECK_LT_ZERO \ + "js 111f\n\t" \ + _REFCOUNT_EXCEPTION + +/* Trigger refcount exception if refcount result is zero or negative. */ +#define REFCOUNT_CHECK_LE_ZERO \ + "jz 111f\n\t" \ + REFCOUNT_CHECK_LT_ZERO + +/* Trigger refcount exception unconditionally. */ +#define REFCOUNT_ERROR \ + "jmp 111f\n\t" \ + _REFCOUNT_EXCEPTION static __always_inline void refcount_add(unsigned int i, refcount_t *r) { asm volatile(LOCK_PREFIX "addl %1,%0\n\t" - "REFCOUNT_CHECK_LT_ZERO counter=\"%[counter]\"" - : [counter] "+m" (r->refs.counter) + REFCOUNT_CHECK_LT_ZERO + : [var] "+m" (r->refs.counter) : "ir" (i) : "cc", "cx"); } @@ -63,32 +51,31 @@ static __always_inline void refcount_add(unsigned int i, refcount_t *r) static __always_inline void refcount_inc(refcount_t *r) { asm volatile(LOCK_PREFIX "incl %0\n\t" - "REFCOUNT_CHECK_LT_ZERO counter=\"%[counter]\"" - : [counter] "+m" (r->refs.counter) + REFCOUNT_CHECK_LT_ZERO + : [var] "+m" (r->refs.counter) : : "cc", "cx"); } static __always_inline void refcount_dec(refcount_t *r) { asm volatile(LOCK_PREFIX "decl %0\n\t" - "REFCOUNT_CHECK_LE_ZERO counter=\"%[counter]\"" - : [counter] "+m" (r->refs.counter) + REFCOUNT_CHECK_LE_ZERO + : [var] "+m" (r->refs.counter) : : "cc", "cx"); } static __always_inline __must_check bool refcount_sub_and_test(unsigned int i, refcount_t *r) { - return GEN_BINARY_SUFFIXED_RMWcc(LOCK_PREFIX "subl", - "REFCOUNT_CHECK_LT_ZERO counter=\"%[var]\"", + REFCOUNT_CHECK_LT_ZERO, r->refs.counter, e, "er", i, "cx"); } static __always_inline __must_check bool refcount_dec_and_test(refcount_t *r) { return GEN_UNARY_SUFFIXED_RMWcc(LOCK_PREFIX "decl", - "REFCOUNT_CHECK_LT_ZERO counter=\"%[var]\"", + REFCOUNT_CHECK_LT_ZERO, r->refs.counter, e, "cx"); } @@ -106,8 +93,8 @@ bool refcount_add_not_zero(unsigned int i, refcount_t *r) /* Did we try to increment from/to an undesirable state? */ if (unlikely(c < 0 || c == INT_MAX || result < c)) { - asm volatile("REFCOUNT_ERROR counter=\"%[counter]\"" - : : [counter] "m" (r->refs.counter) + asm volatile(REFCOUNT_ERROR + : : [var] "m" (r->refs.counter) : "cc", "cx"); break; } @@ -122,6 +109,4 @@ static __always_inline __must_check bool refcount_inc_not_zero(refcount_t *r) return refcount_add_not_zero(1, r); } -#endif /* __ASSEMBLY__ */ - #endif diff --git a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c index 27937458c231..efa4a519f5e5 100644 --- a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c +++ b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c @@ -23,6 +23,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/cpu.h> #include <linux/kernfs.h> #include <linux/seq_file.h> #include <linux/slab.h> @@ -310,9 +311,11 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of, return -EINVAL; buf[nbytes - 1] = '\0'; + cpus_read_lock(); rdtgrp = rdtgroup_kn_lock_live(of->kn); if (!rdtgrp) { rdtgroup_kn_unlock(of->kn); + cpus_read_unlock(); return -ENOENT; } rdt_last_cmd_clear(); @@ -367,6 +370,7 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of, out: rdtgroup_kn_unlock(of->kn); + cpus_read_unlock(); return ret ?: nbytes; } diff --git a/arch/x86/kernel/cpu/mtrr/if.c b/arch/x86/kernel/cpu/mtrr/if.c index 2e173d47b450..4d36dcc1cf87 100644 --- a/arch/x86/kernel/cpu/mtrr/if.c +++ b/arch/x86/kernel/cpu/mtrr/if.c @@ -165,6 +165,8 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) struct mtrr_gentry gentry; void __user *arg = (void __user *) __arg; + memset(&gentry, 0, sizeof(gentry)); + switch (cmd) { case MTRRIOC_ADD_ENTRY: case MTRRIOC_SET_ENTRY: diff --git a/arch/x86/kernel/macros.S b/arch/x86/kernel/macros.S deleted file mode 100644 index 161c95059044..000000000000 --- a/arch/x86/kernel/macros.S +++ /dev/null @@ -1,16 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ - -/* - * This file includes headers whose assembly part includes macros which are - * commonly used. The macros are precompiled into assmebly file which is later - * assembled together with each compiled file. - */ - -#include <linux/compiler.h> -#include <asm/refcount.h> -#include <asm/alternative-asm.h> -#include <asm/bug.h> -#include <asm/paravirt.h> -#include <asm/asm.h> -#include <asm/cpufeature.h> -#include <asm/jump_label.h> diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index bbfbf017065c..ddd4fa718c43 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -339,24 +339,6 @@ static unsigned long x86_fsgsbase_read_task(struct task_struct *task, return base; } -void x86_fsbase_write_cpu(unsigned long fsbase) -{ - /* - * Set the selector to 0 as a notion, that the segment base is - * overwritten, which will be checked for skipping the segment load - * during context switch. - */ - loadseg(FS, 0); - wrmsrl(MSR_FS_BASE, fsbase); -} - -void x86_gsbase_write_cpu_inactive(unsigned long gsbase) -{ - /* Set the selector to 0 for the same reason as %fs above. */ - loadseg(GS, 0); - wrmsrl(MSR_KERNEL_GS_BASE, gsbase); -} - unsigned long x86_fsbase_read_task(struct task_struct *task) { unsigned long fsbase; @@ -385,38 +367,18 @@ unsigned long x86_gsbase_read_task(struct task_struct *task) return gsbase; } -int x86_fsbase_write_task(struct task_struct *task, unsigned long fsbase) +void x86_fsbase_write_task(struct task_struct *task, unsigned long fsbase) { - /* - * Not strictly needed for %fs, but do it for symmetry - * with %gs - */ - if (unlikely(fsbase >= TASK_SIZE_MAX)) - return -EPERM; + WARN_ON_ONCE(task == current); - preempt_disable(); task->thread.fsbase = fsbase; - if (task == current) - x86_fsbase_write_cpu(fsbase); - task->thread.fsindex = 0; - preempt_enable(); - - return 0; } -int x86_gsbase_write_task(struct task_struct *task, unsigned long gsbase) +void x86_gsbase_write_task(struct task_struct *task, unsigned long gsbase) { - if (unlikely(gsbase >= TASK_SIZE_MAX)) - return -EPERM; + WARN_ON_ONCE(task == current); - preempt_disable(); task->thread.gsbase = gsbase; - if (task == current) - x86_gsbase_write_cpu_inactive(gsbase); - task->thread.gsindex = 0; - preempt_enable(); - - return 0; } int copy_thread_tls(unsigned long clone_flags, unsigned long sp, @@ -754,11 +716,60 @@ long do_arch_prctl_64(struct task_struct *task, int option, unsigned long arg2) switch (option) { case ARCH_SET_GS: { - ret = x86_gsbase_write_task(task, arg2); + if (unlikely(arg2 >= TASK_SIZE_MAX)) + return -EPERM; + + preempt_disable(); + /* + * ARCH_SET_GS has always overwritten the index + * and the base. Zero is the most sensible value + * to put in the index, and is the only value that + * makes any sense if FSGSBASE is unavailable. + */ + if (task == current) { + loadseg(GS, 0); + x86_gsbase_write_cpu_inactive(arg2); + + /* + * On non-FSGSBASE systems, save_base_legacy() expects + * that we also fill in thread.gsbase. + */ + task->thread.gsbase = arg2; + + } else { + task->thread.gsindex = 0; + x86_gsbase_write_task(task, arg2); + } + preempt_enable(); break; } case ARCH_SET_FS: { - ret = x86_fsbase_write_task(task, arg2); + /* + * Not strictly needed for %fs, but do it for symmetry + * with %gs + */ + if (unlikely(arg2 >= TASK_SIZE_MAX)) + return -EPERM; + + preempt_disable(); + /* + * Set the selector to 0 for the same reason + * as %gs above. + */ + if (task == current) { + loadseg(FS, 0); + x86_fsbase_write_cpu(arg2); + + /* + * On non-FSGSBASE systems, save_base_legacy() expects + * that we also fill in thread.fsbase. + */ + task->thread.fsbase = arg2; + } else { + task->thread.fsindex = 0; + x86_fsbase_write_task(task, arg2); + } + preempt_enable(); break; } case ARCH_GET_FS: { diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c index ffae9b9740fd..4b8ee05dd6ad 100644 --- a/arch/x86/kernel/ptrace.c +++ b/arch/x86/kernel/ptrace.c @@ -397,11 +397,12 @@ static int putreg(struct task_struct *child, if (value >= TASK_SIZE_MAX) return -EIO; /* - * When changing the FS base, use the same - * mechanism as for do_arch_prctl_64(). + * When changing the FS base, use do_arch_prctl_64() + * to set the index to zero and to set the base + * as requested. */ if (child->thread.fsbase != value) - return x86_fsbase_write_task(child, value); + return do_arch_prctl_64(child, ARCH_SET_FS, value); return 0; case offsetof(struct user_regs_struct,gs_base): /* @@ -410,7 +411,7 @@ static int putreg(struct task_struct *child, if (value >= TASK_SIZE_MAX) return -EIO; if (child->thread.gsbase != value) - return x86_gsbase_write_task(child, value); + return do_arch_prctl_64(child, ARCH_SET_GS, value); return 0; #endif } diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index cc6467b35a85..101f53ccf571 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -2937,6 +2937,8 @@ static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu, static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu) { WARN_ON(mmu_is_nested(vcpu)); + + vcpu->arch.mmu = &vcpu->arch.guest_mmu; kvm_init_shadow_mmu(vcpu); vcpu->arch.mmu->set_cr3 = nested_svm_set_tdp_cr3; vcpu->arch.mmu->get_cr3 = nested_svm_get_tdp_cr3; @@ -2949,6 +2951,7 @@ static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu) static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu) { + vcpu->arch.mmu = &vcpu->arch.root_mmu; vcpu->arch.walk_mmu = &vcpu->arch.root_mmu; } @@ -3458,7 +3461,6 @@ static void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa, svm->vcpu.arch.hflags &= ~HF_HIF_MASK; if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) { - kvm_mmu_unload(&svm->vcpu); svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3; nested_svm_init_mmu_context(&svm->vcpu); } diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c index fc37bbd23eb8..abcb8d00b014 100644 --- a/arch/x86/mm/dump_pagetables.c +++ b/arch/x86/mm/dump_pagetables.c @@ -55,10 +55,10 @@ struct addr_marker { enum address_markers_idx { USER_SPACE_NR = 0, KERNEL_SPACE_NR, - LOW_KERNEL_NR, -#if defined(CONFIG_MODIFY_LDT_SYSCALL) && defined(CONFIG_X86_5LEVEL) +#ifdef CONFIG_MODIFY_LDT_SYSCALL LDT_NR, #endif + LOW_KERNEL_NR, VMALLOC_START_NR, VMEMMAP_START_NR, #ifdef CONFIG_KASAN @@ -66,9 +66,6 @@ enum address_markers_idx { KASAN_SHADOW_END_NR, #endif CPU_ENTRY_AREA_NR, -#if defined(CONFIG_MODIFY_LDT_SYSCALL) && !defined(CONFIG_X86_5LEVEL) - LDT_NR, -#endif #ifdef CONFIG_X86_ESPFIX64 ESPFIX_START_NR, #endif @@ -512,11 +509,11 @@ static inline bool is_hypervisor_range(int idx) { #ifdef CONFIG_X86_64 /* - * ffff800000000000 - ffff87ffffffffff is reserved for - * the hypervisor. + * A hole in the beginning of kernel address space reserved + * for a hypervisor. */ - return (idx >= pgd_index(__PAGE_OFFSET) - 16) && - (idx < pgd_index(__PAGE_OFFSET)); + return (idx >= pgd_index(GUARD_HOLE_BASE_ADDR)) && + (idx < pgd_index(GUARD_HOLE_END_ADDR)); #else return false; #endif diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index db7a10082238..a1bcde35db4c 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -285,20 +285,16 @@ static void cpa_flush_all(unsigned long cache) on_each_cpu(__cpa_flush_all, (void *) cache, 1); } -static bool __cpa_flush_range(unsigned long start, int numpages, int cache) +static bool __inv_flush_all(int cache) { BUG_ON(irqs_disabled() && !early_boot_irqs_disabled); - WARN_ON(PAGE_ALIGN(start) != start); - if (cache && !static_cpu_has(X86_FEATURE_CLFLUSH)) { cpa_flush_all(cache); return true; } - flush_tlb_kernel_range(start, start + PAGE_SIZE * numpages); - - return !cache; + return false; } static void cpa_flush_range(unsigned long start, int numpages, int cache) @@ -306,7 +302,14 @@ static void cpa_flush_range(unsigned long start, int numpages, int cache) unsigned int i, level; unsigned long addr; - if (__cpa_flush_range(start, numpages, cache)) + WARN_ON(PAGE_ALIGN(start) != start); + + if (__inv_flush_all(cache)) + return; + + flush_tlb_kernel_range(start, start + PAGE_SIZE * numpages); + + if (!cache) return; /* @@ -332,7 +335,12 @@ static void cpa_flush_array(unsigned long baddr, unsigned long *start, { unsigned int i, level; - if (__cpa_flush_range(baddr, numpages, cache)) + if (__inv_flush_all(cache)) + return; + + flush_tlb_all(); + + if (!cache) return; /* diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 08013524fba1..4fe956a63b25 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -519,8 +519,13 @@ static u64 sanitize_phys(u64 address) * for a "decoy" virtual address (bit 63 clear) passed to * set_memory_X(). __pa() on a "decoy" address results in a * physical address with bit 63 set. + * + * Decoy addresses are not present for 32-bit builds, see + * set_mce_nospec(). */ - return address & __PHYSICAL_MASK; + if (IS_ENABLED(CONFIG_X86_64)) + return address & __PHYSICAL_MASK; + return address; } /* @@ -546,7 +551,11 @@ int reserve_memtype(u64 start, u64 end, enum page_cache_mode req_type, start = sanitize_phys(start); end = sanitize_phys(end); - BUG_ON(start >= end); /* end is exclusive */ + if (start >= end) { + WARN(1, "%s failed: [mem %#010Lx-%#010Lx], req %s\n", __func__, + start, end - 1, cattr_name(req_type)); + return -EINVAL; + } if (!pat_enabled()) { /* This is identical to page table setting without PAT */ diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c index a5d7ed125337..0f4fe206dcc2 100644 --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -648,19 +648,20 @@ static int __xen_pgd_walk(struct mm_struct *mm, pgd_t *pgd, unsigned long limit) { int i, nr, flush = 0; - unsigned hole_low, hole_high; + unsigned hole_low = 0, hole_high = 0; /* The limit is the last byte to be touched */ limit--; BUG_ON(limit >= FIXADDR_TOP); +#ifdef CONFIG_X86_64 /* * 64-bit has a great big hole in the middle of the address - * space, which contains the Xen mappings. On 32-bit these - * will end up making a zero-sized hole and so is a no-op. + * space, which contains the Xen mappings. */ - hole_low = pgd_index(USER_LIMIT); - hole_high = pgd_index(PAGE_OFFSET); + hole_low = pgd_index(GUARD_HOLE_BASE_ADDR); + hole_high = pgd_index(GUARD_HOLE_END_ADDR); +#endif nr = pgd_index(limit) + 1; for (i = 0; i < nr; i++) { diff --git a/drivers/gpio/gpio-max7301.c b/drivers/gpio/gpio-max7301.c index 05813fbf3daf..647dfbbc4e1c 100644 --- a/drivers/gpio/gpio-max7301.c +++ b/drivers/gpio/gpio-max7301.c @@ -25,7 +25,7 @@ static int max7301_spi_write(struct device *dev, unsigned int reg, struct spi_device *spi = to_spi_device(dev); u16 word = ((reg & 0x7F) << 8) | (val & 0xFF); - return spi_write(spi, (const u8 *)&word, sizeof(word)); + return spi_write_then_read(spi, &word, sizeof(word), NULL, 0); } /* A read from the MAX7301 means two transfers; here, one message each */ @@ -37,14 +37,8 @@ static int max7301_spi_read(struct device *dev, unsigned int reg) struct spi_device *spi = to_spi_device(dev); word = 0x8000 | (reg << 8); - ret = spi_write(spi, (const u8 *)&word, sizeof(word)); - if (ret) - return ret; - /* - * This relies on the fact, that a transfer with NULL tx_buf shifts out - * zero bytes (=NOOP for MAX7301) - */ - ret = spi_read(spi, (u8 *)&word, sizeof(word)); + ret = spi_write_then_read(spi, &word, sizeof(word), &word, + sizeof(word)); if (ret) return ret; return word & 0xff; diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index 6e02148c208b..adc768f908f1 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -773,9 +773,6 @@ static int mvebu_pwm_probe(struct platform_device *pdev, "marvell,armada-370-gpio")) return 0; - if (IS_ERR(mvchip->clk)) - return PTR_ERR(mvchip->clk); - /* * There are only two sets of PWM configuration registers for * all the GPIO lines on those SoCs which this driver reserves @@ -786,6 +783,9 @@ static int mvebu_pwm_probe(struct platform_device *pdev, if (!res) return 0; + if (IS_ERR(mvchip->clk)) + return PTR_ERR(mvchip->clk); + /* * Use set A for lines of GPIO chip with id 0, B for GPIO chip * with id 1. Don't allow further GPIO chips to be used for PWM. diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 9887c3db6e16..5b3e83cd7137 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -32,7 +32,6 @@ #define OMAP4_GPIO_DEBOUNCINGTIME_MASK 0xFF #define OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER BIT(2) -#define OMAP_GPIO_QUIRK_DEFERRED_WKUP_EN BIT(1) struct gpio_regs { u32 irqenable1; @@ -379,18 +378,9 @@ static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio, readl_relaxed(bank->base + bank->regs->fallingdetect); if (likely(!(bank->non_wakeup_gpios & gpio_bit))) { - /* Defer wkup_en register update until we idle? */ - if (bank->quirks & OMAP_GPIO_QUIRK_DEFERRED_WKUP_EN) { - if (trigger) - bank->context.wake_en |= gpio_bit; - else - bank->context.wake_en &= ~gpio_bit; - } else { - omap_gpio_rmw(base, bank->regs->wkup_en, gpio_bit, - trigger != 0); - bank->context.wake_en = - readl_relaxed(bank->base + bank->regs->wkup_en); - } + omap_gpio_rmw(base, bank->regs->wkup_en, gpio_bit, trigger != 0); + bank->context.wake_en = + readl_relaxed(bank->base + bank->regs->wkup_en); } /* This part needs to be executed always for OMAP{34xx, 44xx} */ @@ -942,44 +932,6 @@ omap2_gpio_disable_level_quirk(struct gpio_bank *bank) bank->base + bank->regs->risingdetect); } -/* - * On omap4 and later SoC variants a level interrupt with wkup_en - * enabled blocks the GPIO functional clock from idling until the GPIO - * instance has been reset. To avoid that, we must set wkup_en only for - * idle for level interrupts, and clear level registers for the duration - * of idle. The level interrupts will be still there on wakeup by their - * nature. - */ -static void __maybe_unused -omap4_gpio_enable_level_quirk(struct gpio_bank *bank) -{ - /* Update wake register for idle, edge bits might be already set */ - writel_relaxed(bank->context.wake_en, - bank->base + bank->regs->wkup_en); - - /* Clear level registers for idle */ - writel_relaxed(0, bank->base + bank->regs->leveldetect0); - writel_relaxed(0, bank->base + bank->regs->leveldetect1); -} - -static void __maybe_unused -omap4_gpio_disable_level_quirk(struct gpio_bank *bank) -{ - /* Restore level registers after idle */ - writel_relaxed(bank->context.leveldetect0, - bank->base + bank->regs->leveldetect0); - writel_relaxed(bank->context.leveldetect1, - bank->base + bank->regs->leveldetect1); - - /* Clear saved wkup_en for level, it will be set for next idle again */ - bank->context.wake_en &= ~(bank->context.leveldetect0 | - bank->context.leveldetect1); - - /* Update wake with only edge configuration */ - writel_relaxed(bank->context.wake_en, - bank->base + bank->regs->wkup_en); -} - /*---------------------------------------------------------------------*/ static int omap_mpuio_suspend_noirq(struct device *dev) @@ -1412,12 +1364,7 @@ static int omap_gpio_probe(struct platform_device *pdev) omap_set_gpio_dataout_mask_multiple; } - if (bank->quirks & OMAP_GPIO_QUIRK_DEFERRED_WKUP_EN) { - bank->funcs.idle_enable_level_quirk = - omap4_gpio_enable_level_quirk; - bank->funcs.idle_disable_level_quirk = - omap4_gpio_disable_level_quirk; - } else if (bank->quirks & OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER) { + if (bank->quirks & OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER) { bank->funcs.idle_enable_level_quirk = omap2_gpio_enable_level_quirk; bank->funcs.idle_disable_level_quirk = @@ -1806,8 +1753,7 @@ static const struct omap_gpio_platform_data omap4_pdata = { .regs = &omap4_gpio_regs, .bank_width = 32, .dbck_flag = true, - .quirks = OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER | - OMAP_GPIO_QUIRK_DEFERRED_WKUP_EN, + .quirks = OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER, }; static const struct of_device_id omap_gpio_match[] = { diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 55b72fbe1631..7f93954c58ea 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -19,11 +19,28 @@ #include "gpiolib.h" +/** + * struct acpi_gpio_event - ACPI GPIO event handler data + * + * @node: list-entry of the events list of the struct acpi_gpio_chip + * @handle: handle of ACPI method to execute when the IRQ triggers + * @handler: irq_handler to pass to request_irq when requesting the IRQ + * @pin: GPIO pin number on the gpio_chip + * @irq: Linux IRQ number for the event, for request_ / free_irq + * @irqflags: flags to pass to request_irq when requesting the IRQ + * @irq_is_wake: If the ACPI flags indicate the IRQ is a wakeup source + * @is_requested: True if request_irq has been done + * @desc: gpio_desc for the GPIO pin for this event + */ struct acpi_gpio_event { struct list_head node; acpi_handle handle; + irq_handler_t handler; unsigned int pin; unsigned int irq; + unsigned long irqflags; + bool irq_is_wake; + bool irq_requested; struct gpio_desc *desc; }; @@ -49,10 +66,10 @@ struct acpi_gpio_chip { /* * For gpiochips which call acpi_gpiochip_request_interrupts() before late_init - * (so builtin drivers) we register the ACPI GpioInt event handlers from a + * (so builtin drivers) we register the ACPI GpioInt IRQ handlers from a * late_initcall_sync handler, so that other builtin drivers can register their * OpRegions before the event handlers can run. This list contains gpiochips - * for which the acpi_gpiochip_request_interrupts() has been deferred. + * for which the acpi_gpiochip_request_irqs() call has been deferred. */ static DEFINE_MUTEX(acpi_gpio_deferred_req_irqs_lock); static LIST_HEAD(acpi_gpio_deferred_req_irqs_list); @@ -133,8 +150,42 @@ bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, } EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource); -static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares, - void *context) +static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio, + struct acpi_gpio_event *event) +{ + int ret, value; + + ret = request_threaded_irq(event->irq, NULL, event->handler, + event->irqflags, "ACPI:Event", event); + if (ret) { + dev_err(acpi_gpio->chip->parent, + "Failed to setup interrupt handler for %d\n", + event->irq); + return; + } + + if (event->irq_is_wake) + enable_irq_wake(event->irq); + + event->irq_requested = true; + + /* Make sure we trigger the initial state of edge-triggered IRQs */ + value = gpiod_get_raw_value_cansleep(event->desc); + if (((event->irqflags & IRQF_TRIGGER_RISING) && value == 1) || + ((event->irqflags & IRQF_TRIGGER_FALLING) && value == 0)) + event->handler(event->irq, event); +} + +static void acpi_gpiochip_request_irqs(struct acpi_gpio_chip *acpi_gpio) +{ + struct acpi_gpio_event *event; + + list_for_each_entry(event, &acpi_gpio->events, node) + acpi_gpiochip_request_irq(acpi_gpio, event); +} + +static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares, + void *context) { struct acpi_gpio_chip *acpi_gpio = context; struct gpio_chip *chip = acpi_gpio->chip; @@ -143,8 +194,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares, struct acpi_gpio_event *event; irq_handler_t handler = NULL; struct gpio_desc *desc; - unsigned long irqflags; - int ret, pin, irq, value; + int ret, pin, irq; if (!acpi_gpio_get_irq_resource(ares, &agpio)) return AE_OK; @@ -175,8 +225,6 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares, gpiod_direction_input(desc); - value = gpiod_get_value_cansleep(desc); - ret = gpiochip_lock_as_irq(chip, pin); if (ret) { dev_err(chip->parent, "Failed to lock GPIO as interrupt\n"); @@ -189,64 +237,42 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares, goto fail_unlock_irq; } - irqflags = IRQF_ONESHOT; + event = kzalloc(sizeof(*event), GFP_KERNEL); + if (!event) + goto fail_unlock_irq; + + event->irqflags = IRQF_ONESHOT; if (agpio->triggering == ACPI_LEVEL_SENSITIVE) { if (agpio->polarity == ACPI_ACTIVE_HIGH) - irqflags |= IRQF_TRIGGER_HIGH; + event->irqflags |= IRQF_TRIGGER_HIGH; else - irqflags |= IRQF_TRIGGER_LOW; + event->irqflags |= IRQF_TRIGGER_LOW; } else { switch (agpio->polarity) { case ACPI_ACTIVE_HIGH: - irqflags |= IRQF_TRIGGER_RISING; + event->irqflags |= IRQF_TRIGGER_RISING; break; case ACPI_ACTIVE_LOW: - irqflags |= IRQF_TRIGGER_FALLING; + event->irqflags |= IRQF_TRIGGER_FALLING; break; default: - irqflags |= IRQF_TRIGGER_RISING | - IRQF_TRIGGER_FALLING; + event->irqflags |= IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING; break; } } - event = kzalloc(sizeof(*event), GFP_KERNEL); - if (!event) - goto fail_unlock_irq; - event->handle = evt_handle; + event->handler = handler; event->irq = irq; + event->irq_is_wake = agpio->wake_capable == ACPI_WAKE_CAPABLE; event->pin = pin; event->desc = desc; - ret = request_threaded_irq(event->irq, NULL, handler, irqflags, - "ACPI:Event", event); - if (ret) { - dev_err(chip->parent, - "Failed to setup interrupt handler for %d\n", - event->irq); - goto fail_free_event; - } - - if (agpio->wake_capable == ACPI_WAKE_CAPABLE) - enable_irq_wake(irq); - list_add_tail(&event->node, &acpi_gpio->events); - /* - * Make sure we trigger the initial state of the IRQ when using RISING - * or FALLING. Note we run the handlers on late_init, the AML code - * may refer to OperationRegions from other (builtin) drivers which - * may be probed after us. - */ - if (((irqflags & IRQF_TRIGGER_RISING) && value == 1) || - ((irqflags & IRQF_TRIGGER_FALLING) && value == 0)) - handler(event->irq, event); - return AE_OK; -fail_free_event: - kfree(event); fail_unlock_irq: gpiochip_unlock_as_irq(chip, pin); fail_free_desc: @@ -283,6 +309,9 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) if (ACPI_FAILURE(status)) return; + acpi_walk_resources(handle, "_AEI", + acpi_gpiochip_alloc_event, acpi_gpio); + mutex_lock(&acpi_gpio_deferred_req_irqs_lock); defer = !acpi_gpio_deferred_req_irqs_done; if (defer) @@ -293,8 +322,7 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) if (defer) return; - acpi_walk_resources(handle, "_AEI", - acpi_gpiochip_request_interrupt, acpi_gpio); + acpi_gpiochip_request_irqs(acpi_gpio); } EXPORT_SYMBOL_GPL(acpi_gpiochip_request_interrupts); @@ -331,10 +359,13 @@ void acpi_gpiochip_free_interrupts(struct gpio_chip *chip) list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) { struct gpio_desc *desc; - if (irqd_is_wakeup_set(irq_get_irq_data(event->irq))) - disable_irq_wake(event->irq); + if (event->irq_requested) { + if (event->irq_is_wake) + disable_irq_wake(event->irq); + + free_irq(event->irq, event); + } - free_irq(event->irq, event); desc = event->desc; if (WARN_ON(IS_ERR(desc))) continue; @@ -1200,23 +1231,16 @@ bool acpi_can_fallback_to_crs(struct acpi_device *adev, const char *con_id) return con_id == NULL; } -/* Run deferred acpi_gpiochip_request_interrupts() */ -static int acpi_gpio_handle_deferred_request_interrupts(void) +/* Run deferred acpi_gpiochip_request_irqs() */ +static int acpi_gpio_handle_deferred_request_irqs(void) { struct acpi_gpio_chip *acpi_gpio, *tmp; mutex_lock(&acpi_gpio_deferred_req_irqs_lock); list_for_each_entry_safe(acpi_gpio, tmp, &acpi_gpio_deferred_req_irqs_list, - deferred_req_irqs_list_entry) { - acpi_handle handle; - - handle = ACPI_HANDLE(acpi_gpio->chip->parent); - acpi_walk_resources(handle, "_AEI", - acpi_gpiochip_request_interrupt, acpi_gpio); - - list_del_init(&acpi_gpio->deferred_req_irqs_list_entry); - } + deferred_req_irqs_list_entry) + acpi_gpiochip_request_irqs(acpi_gpio); acpi_gpio_deferred_req_irqs_done = true; mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); @@ -1224,4 +1248,4 @@ static int acpi_gpio_handle_deferred_request_interrupts(void) return 0; } /* We must use _sync so that this runs after the first deferred_probe run */ -late_initcall_sync(acpi_gpio_handle_deferred_request_interrupts); +late_initcall_sync(acpi_gpio_handle_deferred_request_irqs); diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 94bd872d56c4..7e6746b2d704 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -37,6 +37,7 @@ #include <linux/pci.h> #include <linux/export.h> +#include <linux/nospec.h> /** * DOC: getunique and setversion story @@ -800,13 +801,17 @@ long drm_ioctl(struct file *filp, if (is_driver_ioctl) { /* driver ioctl */ - if (nr - DRM_COMMAND_BASE >= dev->driver->num_ioctls) + unsigned int index = nr - DRM_COMMAND_BASE; + + if (index >= dev->driver->num_ioctls) goto err_i1; - ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; + index = array_index_nospec(index, dev->driver->num_ioctls); + ioctl = &dev->driver->ioctls[index]; } else { /* core ioctl */ if (nr >= DRM_CORE_IOCTL_COUNT) goto err_i1; + nr = array_index_nospec(nr, DRM_CORE_IOCTL_COUNT); ioctl = &drm_ioctls[nr]; } @@ -888,6 +893,7 @@ bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) if (nr >= DRM_CORE_IOCTL_COUNT) return false; + nr = array_index_nospec(nr, DRM_CORE_IOCTL_COUNT); *flags = drm_ioctls[nr].flags; return true; diff --git a/drivers/i2c/busses/i2c-nvidia-gpu.c b/drivers/i2c/busses/i2c-nvidia-gpu.c index e99c3bb58351..4e67d5ed480e 100644 --- a/drivers/i2c/busses/i2c-nvidia-gpu.c +++ b/drivers/i2c/busses/i2c-nvidia-gpu.c @@ -342,7 +342,7 @@ static void gpu_i2c_remove(struct pci_dev *pdev) pci_free_irq_vectors(pdev); } -static int gpu_i2c_resume(struct device *dev) +static __maybe_unused int gpu_i2c_resume(struct device *dev) { struct gpu_i2c_dev *i2cd = dev_get_drvdata(dev); diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c index a7dc286f406c..840e53732753 100644 --- a/drivers/input/keyboard/omap4-keypad.c +++ b/drivers/input/keyboard/omap4-keypad.c @@ -126,12 +126,8 @@ static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id) { struct omap4_keypad *keypad_data = dev_id; - if (kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS)) { - /* Disable interrupts */ - kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE, - OMAP4_VAL_IRQDISABLE); + if (kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS)) return IRQ_WAKE_THREAD; - } return IRQ_NONE; } @@ -173,11 +169,6 @@ static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id) kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS, kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS)); - /* enable interrupts */ - kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE, - OMAP4_DEF_IRQENABLE_EVENTEN | - OMAP4_DEF_IRQENABLE_LONGKEY); - return IRQ_HANDLED; } @@ -214,9 +205,10 @@ static void omap4_keypad_close(struct input_dev *input) disable_irq(keypad_data->irq); - /* Disable interrupts */ + /* Disable interrupts and wake-up events */ kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE, OMAP4_VAL_IRQDISABLE); + kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE, 0); /* clear pending interrupts */ kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS, @@ -365,7 +357,7 @@ static int omap4_keypad_probe(struct platform_device *pdev) } error = request_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler, - omap4_keypad_irq_thread_fn, 0, + omap4_keypad_irq_thread_fn, IRQF_ONESHOT, "omap4-keypad", keypad_data); if (error) { dev_err(&pdev->dev, "failed to register interrupt\n"); diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c index 2d95e8d93cc7..9fe075c137dc 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -1767,6 +1767,18 @@ static int elantech_smbus = IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) ? module_param_named(elantech_smbus, elantech_smbus, int, 0644); MODULE_PARM_DESC(elantech_smbus, "Use a secondary bus for the Elantech device."); +static const char * const i2c_blacklist_pnp_ids[] = { + /* + * These are known to not be working properly as bits are missing + * in elan_i2c. + */ + "LEN2131", /* ThinkPad P52 w/ NFC */ + "LEN2132", /* ThinkPad P52 */ + "LEN2133", /* ThinkPad P72 w/ NFC */ + "LEN2134", /* ThinkPad P72 */ + NULL +}; + static int elantech_create_smbus(struct psmouse *psmouse, struct elantech_device_info *info, bool leave_breadcrumbs) @@ -1802,10 +1814,12 @@ static int elantech_setup_smbus(struct psmouse *psmouse, if (elantech_smbus == ELANTECH_SMBUS_NOT_SET) { /* - * New ICs are enabled by default. + * New ICs are enabled by default, unless mentioned in + * i2c_blacklist_pnp_ids. * Old ICs are up to the user to decide. */ - if (!ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version)) + if (!ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) || + psmouse_matches_pnp_id(psmouse, i2c_blacklist_pnp_ids)) return -ENXIO; } diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 2bd5bb11c8ba..b6da0c1267e3 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -171,6 +171,7 @@ static const char * const smbus_pnp_ids[] = { "LEN0046", /* X250 */ "LEN004a", /* W541 */ "LEN005b", /* P50 */ + "LEN005e", /* T560 */ "LEN0071", /* T480 */ "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */ "LEN0073", /* X1 Carbon G5 (Elantech) */ @@ -178,6 +179,7 @@ static const char * const smbus_pnp_ids[] = { "LEN0096", /* X280 */ "LEN0097", /* X280 -> ALPS trackpoint */ "LEN200f", /* T450s */ + "SYN3052", /* HP EliteBook 840 G4 */ "SYN3221", /* HP 15-ay000 */ NULL }; diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index a4e3454133a4..09170b707339 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -1101,10 +1101,10 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway) ubi_wl_close(ubi); ubi_free_internal_volumes(ubi); vfree(ubi->vtbl); - put_mtd_device(ubi->mtd); vfree(ubi->peb_buf); vfree(ubi->fm_buf); ubi_msg(ubi, "mtd%d is detached", ubi->mtd->index); + put_mtd_device(ubi->mtd); put_device(&ubi->dev); return 0; } diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c index e9e9ecbcedcc..0b8f0c46268d 100644 --- a/drivers/mtd/ubi/kapi.c +++ b/drivers/mtd/ubi/kapi.c @@ -227,9 +227,9 @@ out_unlock: out_free: kfree(desc); out_put_ubi: - ubi_put_device(ubi); ubi_err(ubi, "cannot open device %d, volume %d, error %d", ubi_num, vol_id, err); + ubi_put_device(ubi); return ERR_PTR(err); } EXPORT_SYMBOL_GPL(ubi_open_volume); diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c index 9e7ef7ec2d70..a8999f930b22 100644 --- a/fs/cifs/smb2inode.c +++ b/fs/cifs/smb2inode.c @@ -97,7 +97,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, if (rc) goto finished; - smb2_set_next_command(server, &rqst[num_rqst++]); + smb2_set_next_command(server, &rqst[num_rqst++], 0); /* Operation */ switch (command) { @@ -111,7 +111,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, SMB2_O_INFO_FILE, 0, sizeof(struct smb2_file_all_info) + PATH_MAX * 2, 0, NULL); - smb2_set_next_command(server, &rqst[num_rqst]); + smb2_set_next_command(server, &rqst[num_rqst], 0); smb2_set_related(&rqst[num_rqst++]); break; case SMB2_OP_DELETE: @@ -127,14 +127,14 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, rqst[num_rqst].rq_iov = si_iov; rqst[num_rqst].rq_nvec = 1; - size[0] = 8; + size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */ data[0] = &delete_pending[0]; rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID, COMPOUND_FID, current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); - smb2_set_next_command(server, &rqst[num_rqst]); + smb2_set_next_command(server, &rqst[num_rqst], 1); smb2_set_related(&rqst[num_rqst++]); break; case SMB2_OP_SET_EOF: @@ -149,7 +149,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, COMPOUND_FID, current->tgid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); - smb2_set_next_command(server, &rqst[num_rqst]); + smb2_set_next_command(server, &rqst[num_rqst], 0); smb2_set_related(&rqst[num_rqst++]); break; case SMB2_OP_SET_INFO: @@ -165,7 +165,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, COMPOUND_FID, current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); - smb2_set_next_command(server, &rqst[num_rqst]); + smb2_set_next_command(server, &rqst[num_rqst], 0); smb2_set_related(&rqst[num_rqst++]); break; case SMB2_OP_RENAME: @@ -189,7 +189,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, COMPOUND_FID, current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); - smb2_set_next_command(server, &rqst[num_rqst]); + smb2_set_next_command(server, &rqst[num_rqst], 0); smb2_set_related(&rqst[num_rqst++]); break; case SMB2_OP_HARDLINK: @@ -213,7 +213,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, COMPOUND_FID, current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); - smb2_set_next_command(server, &rqst[num_rqst]); + smb2_set_next_command(server, &rqst[num_rqst], 0); smb2_set_related(&rqst[num_rqst++]); break; default: diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 225fec1cfa67..e25c7aade98a 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1194,7 +1194,7 @@ smb2_ioctl_query_info(const unsigned int xid, rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path); if (rc) goto iqinf_exit; - smb2_set_next_command(ses->server, &rqst[0]); + smb2_set_next_command(ses->server, &rqst[0], 0); /* Query */ memset(&qi_iov, 0, sizeof(qi_iov)); @@ -1208,7 +1208,7 @@ smb2_ioctl_query_info(const unsigned int xid, qi.output_buffer_length, buffer); if (rc) goto iqinf_exit; - smb2_set_next_command(ses->server, &rqst[1]); + smb2_set_next_command(ses->server, &rqst[1], 0); smb2_set_related(&rqst[1]); /* Close */ @@ -1761,16 +1761,23 @@ smb2_set_related(struct smb_rqst *rqst) char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; void -smb2_set_next_command(struct TCP_Server_Info *server, struct smb_rqst *rqst) +smb2_set_next_command(struct TCP_Server_Info *server, struct smb_rqst *rqst, + bool has_space_for_padding) { struct smb2_sync_hdr *shdr; unsigned long len = smb_rqst_len(server, rqst); /* SMB headers in a compound are 8 byte aligned. */ if (len & 7) { - rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; - rqst->rq_iov[rqst->rq_nvec].iov_len = 8 - (len & 7); - rqst->rq_nvec++; + if (has_space_for_padding) { + len = rqst->rq_iov[rqst->rq_nvec - 1].iov_len; + rqst->rq_iov[rqst->rq_nvec - 1].iov_len = + (len + 7) & ~7; + } else { + rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; + rqst->rq_iov[rqst->rq_nvec].iov_len = 8 - (len & 7); + rqst->rq_nvec++; + } len = smb_rqst_len(server, rqst); } @@ -1820,7 +1827,7 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &srch_path); if (rc) goto qfs_exit; - smb2_set_next_command(server, &rqst[0]); + smb2_set_next_command(server, &rqst[0], 0); memset(&qi_iov, 0, sizeof(qi_iov)); rqst[1].rq_iov = qi_iov; @@ -1833,7 +1840,7 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, NULL); if (rc) goto qfs_exit; - smb2_set_next_command(server, &rqst[1]); + smb2_set_next_command(server, &rqst[1], 0); smb2_set_related(&rqst[1]); memset(&close_iov, 0, sizeof(close_iov)); diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 9f4e9ed9ce53..2fe78acd7d0c 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -117,7 +117,8 @@ extern int smb3_crypto_aead_allocate(struct TCP_Server_Info *server); extern unsigned long smb_rqst_len(struct TCP_Server_Info *server, struct smb_rqst *rqst); extern void smb2_set_next_command(struct TCP_Server_Info *server, - struct smb_rqst *rqst); + struct smb_rqst *rqst, + bool has_space_for_padding); extern void smb2_set_related(struct smb_rqst *rqst); /* diff --git a/fs/ubifs/Kconfig b/fs/ubifs/Kconfig index 529856fbccd0..bc1e082d921d 100644 --- a/fs/ubifs/Kconfig +++ b/fs/ubifs/Kconfig @@ -12,9 +12,10 @@ config UBIFS_FS help UBIFS is a file system for flash devices which works on top of UBI. +if UBIFS_FS + config UBIFS_FS_ADVANCED_COMPR bool "Advanced compression options" - depends on UBIFS_FS help This option allows to explicitly choose which compressions, if any, are enabled in UBIFS. Removing compressors means inability to read @@ -24,7 +25,6 @@ config UBIFS_FS_ADVANCED_COMPR config UBIFS_FS_LZO bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR - depends on UBIFS_FS default y help LZO compressor is generally faster than zlib but compresses worse. @@ -32,14 +32,12 @@ config UBIFS_FS_LZO config UBIFS_FS_ZLIB bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR - depends on UBIFS_FS default y help Zlib compresses better than LZO but it is slower. Say 'Y' if unsure. config UBIFS_ATIME_SUPPORT - bool "Access time support" if UBIFS_FS - depends on UBIFS_FS + bool "Access time support" default n help Originally UBIFS did not support atime, because it looked like a bad idea due @@ -54,7 +52,6 @@ config UBIFS_ATIME_SUPPORT config UBIFS_FS_XATTR bool "UBIFS XATTR support" - depends on UBIFS_FS default y help Saying Y here includes support for extended attributes (xattrs). @@ -65,7 +62,7 @@ config UBIFS_FS_XATTR config UBIFS_FS_ENCRYPTION bool "UBIFS Encryption" - depends on UBIFS_FS && UBIFS_FS_XATTR && BLOCK + depends on UBIFS_FS_XATTR && BLOCK select FS_ENCRYPTION default n help @@ -76,7 +73,7 @@ config UBIFS_FS_ENCRYPTION config UBIFS_FS_SECURITY bool "UBIFS Security Labels" - depends on UBIFS_FS && UBIFS_FS_XATTR + depends on UBIFS_FS_XATTR default y help Security labels provide an access control facility to support Linux @@ -89,6 +86,7 @@ config UBIFS_FS_SECURITY config UBIFS_FS_AUTHENTICATION bool "UBIFS authentication support" + depends on KEYS select CRYPTO_HMAC help Enable authentication support for UBIFS. This feature offers protection @@ -96,3 +94,5 @@ config UBIFS_FS_AUTHENTICATION If you say yes here you should also select a hashing algorithm such as sha256, these are not selected automatically since there are many different options. + +endif # UBIFS_FS diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c index d1d5e96350dd..b0c5f06128b5 100644 --- a/fs/ubifs/lpt.c +++ b/fs/ubifs/lpt.c @@ -1675,6 +1675,12 @@ int ubifs_lpt_calc_hash(struct ubifs_info *c, u8 *hash) if (!ubifs_authenticated(c)) return 0; + if (!c->nroot) { + err = ubifs_read_nnode(c, NULL, 0); + if (err) + return err; + } + desc = ubifs_hash_get_desc(c); if (IS_ERR(desc)) return PTR_ERR(desc); @@ -1685,12 +1691,6 @@ int ubifs_lpt_calc_hash(struct ubifs_info *c, u8 *hash) goto out; } - if (!c->nroot) { - err = ubifs_read_nnode(c, NULL, 0); - if (err) - return err; - } - cnode = (struct ubifs_cnode *)c->nroot; while (cnode) { diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c index 75f961c4c044..0a0e65c07c6d 100644 --- a/fs/ubifs/replay.c +++ b/fs/ubifs/replay.c @@ -213,6 +213,38 @@ static int trun_remove_range(struct ubifs_info *c, struct replay_entry *r) } /** + * inode_still_linked - check whether inode in question will be re-linked. + * @c: UBIFS file-system description object + * @rino: replay entry to test + * + * O_TMPFILE files can be re-linked, this means link count goes from 0 to 1. + * This case needs special care, otherwise all references to the inode will + * be removed upon the first replay entry of an inode with link count 0 + * is found. + */ +static bool inode_still_linked(struct ubifs_info *c, struct replay_entry *rino) +{ + struct replay_entry *r; + + ubifs_assert(c, rino->deletion); + ubifs_assert(c, key_type(c, &rino->key) == UBIFS_INO_KEY); + + /* + * Find the most recent entry for the inode behind @rino and check + * whether it is a deletion. + */ + list_for_each_entry_reverse(r, &c->replay_list, list) { + ubifs_assert(c, r->sqnum >= rino->sqnum); + if (key_inum(c, &r->key) == key_inum(c, &rino->key)) + return r->deletion == 0; + + } + + ubifs_assert(c, 0); + return false; +} + +/** * apply_replay_entry - apply a replay entry to the TNC. * @c: UBIFS file-system description object * @r: replay entry to apply @@ -239,6 +271,11 @@ static int apply_replay_entry(struct ubifs_info *c, struct replay_entry *r) { ino_t inum = key_inum(c, &r->key); + if (inode_still_linked(c, r)) { + err = 0; + break; + } + err = ubifs_tnc_remove_ino(c, inum); break; } @@ -533,6 +570,28 @@ static int is_last_bud(struct ubifs_info *c, struct ubifs_bud *bud) return data == 0xFFFFFFFF; } +/* authenticate_sleb_hash and authenticate_sleb_hmac are split out for stack usage */ +static int authenticate_sleb_hash(struct ubifs_info *c, struct shash_desc *log_hash, u8 *hash) +{ + SHASH_DESC_ON_STACK(hash_desc, c->hash_tfm); + + hash_desc->tfm = c->hash_tfm; + hash_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; + + ubifs_shash_copy_state(c, log_hash, hash_desc); + return crypto_shash_final(hash_desc, hash); +} + +static int authenticate_sleb_hmac(struct ubifs_info *c, u8 *hash, u8 *hmac) +{ + SHASH_DESC_ON_STACK(hmac_desc, c->hmac_tfm); + + hmac_desc->tfm = c->hmac_tfm; + hmac_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; + + return crypto_shash_digest(hmac_desc, hash, c->hash_len, hmac); +} + /** * authenticate_sleb - authenticate one scan LEB * @c: UBIFS file-system description object @@ -574,21 +633,12 @@ static int authenticate_sleb(struct ubifs_info *c, struct ubifs_scan_leb *sleb, if (snod->type == UBIFS_AUTH_NODE) { struct ubifs_auth_node *auth = snod->node; - SHASH_DESC_ON_STACK(hash_desc, c->hash_tfm); - SHASH_DESC_ON_STACK(hmac_desc, c->hmac_tfm); - - hash_desc->tfm = c->hash_tfm; - hash_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; - ubifs_shash_copy_state(c, log_hash, hash_desc); - err = crypto_shash_final(hash_desc, hash); + err = authenticate_sleb_hash(c, log_hash, hash); if (err) goto out; - hmac_desc->tfm = c->hmac_tfm; - hmac_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; - err = crypto_shash_digest(hmac_desc, hash, c->hash_len, - hmac); + err = authenticate_sleb_hmac(c, hash, hmac); if (err) goto out; diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c index 75a69dd26d6e..3da90c951c23 100644 --- a/fs/ubifs/sb.c +++ b/fs/ubifs/sb.c @@ -63,6 +63,17 @@ /* Default time granularity in nanoseconds */ #define DEFAULT_TIME_GRAN 1000000000 +static int get_default_compressor(struct ubifs_info *c) +{ + if (ubifs_compr_present(c, UBIFS_COMPR_LZO)) + return UBIFS_COMPR_LZO; + + if (ubifs_compr_present(c, UBIFS_COMPR_ZLIB)) + return UBIFS_COMPR_ZLIB; + + return UBIFS_COMPR_NONE; +} + /** * create_default_filesystem - format empty UBI volume. * @c: UBIFS file-system description object @@ -207,7 +218,7 @@ static int create_default_filesystem(struct ubifs_info *c) if (c->mount_opts.override_compr) sup->default_compr = cpu_to_le16(c->mount_opts.compr_type); else - sup->default_compr = cpu_to_le16(UBIFS_COMPR_LZO); + sup->default_compr = cpu_to_le16(get_default_compressor(c)); generate_random_uuid(sup->uuid); diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index cdafa5edea49..20561a60db9c 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -17,8 +17,10 @@ #ifndef __ASSEMBLY__ #include <linux/kernel.h> -struct bug_entry { +#ifdef CONFIG_BUG + #ifdef CONFIG_GENERIC_BUG +struct bug_entry { #ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS unsigned long bug_addr; #else @@ -33,10 +35,8 @@ struct bug_entry { unsigned short line; #endif unsigned short flags; -#endif /* CONFIG_GENERIC_BUG */ }; - -#ifdef CONFIG_BUG +#endif /* CONFIG_GENERIC_BUG */ /* * Don't use BUG() or BUG_ON() unless there's really no way out; one diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 06396c1cf127..fc5004a4b07d 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -99,13 +99,22 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, * unique, to convince GCC not to merge duplicate inline asm statements. */ #define annotate_reachable() ({ \ - asm volatile("ANNOTATE_REACHABLE counter=%c0" \ - : : "i" (__COUNTER__)); \ + asm volatile("%c0:\n\t" \ + ".pushsection .discard.reachable\n\t" \ + ".long %c0b - .\n\t" \ + ".popsection\n\t" : : "i" (__COUNTER__)); \ }) #define annotate_unreachable() ({ \ - asm volatile("ANNOTATE_UNREACHABLE counter=%c0" \ - : : "i" (__COUNTER__)); \ + asm volatile("%c0:\n\t" \ + ".pushsection .discard.unreachable\n\t" \ + ".long %c0b - .\n\t" \ + ".popsection\n\t" : : "i" (__COUNTER__)); \ }) +#define ASM_UNREACHABLE \ + "999:\n\t" \ + ".pushsection .discard.unreachable\n\t" \ + ".long 999b - .\n\t" \ + ".popsection\n\t" #else #define annotate_reachable() #define annotate_unreachable() @@ -293,45 +302,6 @@ static inline void *offset_to_ptr(const int *off) return (void *)((unsigned long)off + *off); } -#else /* __ASSEMBLY__ */ - -#ifdef __KERNEL__ -#ifndef LINKER_SCRIPT - -#ifdef CONFIG_STACK_VALIDATION -.macro ANNOTATE_UNREACHABLE counter:req -\counter: - .pushsection .discard.unreachable - .long \counter\()b -. - .popsection -.endm - -.macro ANNOTATE_REACHABLE counter:req -\counter: - .pushsection .discard.reachable - .long \counter\()b -. - .popsection -.endm - -.macro ASM_UNREACHABLE -999: - .pushsection .discard.unreachable - .long 999b - . - .popsection -.endm -#else /* CONFIG_STACK_VALIDATION */ -.macro ANNOTATE_UNREACHABLE counter:req -.endm - -.macro ANNOTATE_REACHABLE counter:req -.endm - -.macro ASM_UNREACHABLE -.endm -#endif /* CONFIG_STACK_VALIDATION */ - -#endif /* LINKER_SCRIPT */ -#endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ /* Compile time object size, -1 for unknown */ diff --git a/kernel/futex.c b/kernel/futex.c index f423f9b6577e..5cc8083a4c89 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -1148,11 +1148,65 @@ out_error: return ret; } +static int handle_exit_race(u32 __user *uaddr, u32 uval, + struct task_struct *tsk) +{ + u32 uval2; + + /* + * If PF_EXITPIDONE is not yet set, then try again. + */ + if (tsk && !(tsk->flags & PF_EXITPIDONE)) + return -EAGAIN; + + /* + * Reread the user space value to handle the following situation: + * + * CPU0 CPU1 + * + * sys_exit() sys_futex() + * do_exit() futex_lock_pi() + * futex_lock_pi_atomic() + * exit_signals(tsk) No waiters: + * tsk->flags |= PF_EXITING; *uaddr == 0x00000PID + * mm_release(tsk) Set waiter bit + * exit_robust_list(tsk) { *uaddr = 0x80000PID; + * Set owner died attach_to_pi_owner() { + * *uaddr = 0xC0000000; tsk = get_task(PID); + * } if (!tsk->flags & PF_EXITING) { + * ... attach(); + * tsk->flags |= PF_EXITPIDONE; } else { + * if (!(tsk->flags & PF_EXITPIDONE)) + * return -EAGAIN; + * return -ESRCH; <--- FAIL + * } + * + * Returning ESRCH unconditionally is wrong here because the + * user space value has been changed by the exiting task. + * + * The same logic applies to the case where the exiting task is + * already gone. + */ + if (get_futex_value_locked(&uval2, uaddr)) + return -EFAULT; + + /* If the user space value has changed, try again. */ + if (uval2 != uval) + return -EAGAIN; + + /* + * The exiting task did not have a robust list, the robust list was + * corrupted or the user space value in *uaddr is simply bogus. + * Give up and tell user space. + */ + return -ESRCH; +} + /* * Lookup the task for the TID provided from user space and attach to * it after doing proper sanity checks. */ -static int attach_to_pi_owner(u32 uval, union futex_key *key, +static int attach_to_pi_owner(u32 __user *uaddr, u32 uval, union futex_key *key, struct futex_pi_state **ps) { pid_t pid = uval & FUTEX_TID_MASK; @@ -1162,12 +1216,15 @@ static int attach_to_pi_owner(u32 uval, union futex_key *key, /* * We are the first waiter - try to look up the real owner and attach * the new pi_state to it, but bail out when TID = 0 [1] + * + * The !pid check is paranoid. None of the call sites should end up + * with pid == 0, but better safe than sorry. Let the caller retry */ if (!pid) - return -ESRCH; + return -EAGAIN; p = find_get_task_by_vpid(pid); if (!p) - return -ESRCH; + return handle_exit_race(uaddr, uval, NULL); if (unlikely(p->flags & PF_KTHREAD)) { put_task_struct(p); @@ -1187,7 +1244,7 @@ static int attach_to_pi_owner(u32 uval, union futex_key *key, * set, we know that the task has finished the * cleanup: */ - int ret = (p->flags & PF_EXITPIDONE) ? -ESRCH : -EAGAIN; + int ret = handle_exit_race(uaddr, uval, p); raw_spin_unlock_irq(&p->pi_lock); put_task_struct(p); @@ -1244,7 +1301,7 @@ static int lookup_pi_state(u32 __user *uaddr, u32 uval, * We are the first waiter - try to look up the owner based on * @uval and attach to it. */ - return attach_to_pi_owner(uval, key, ps); + return attach_to_pi_owner(uaddr, uval, key, ps); } static int lock_pi_update_atomic(u32 __user *uaddr, u32 uval, u32 newval) @@ -1352,7 +1409,7 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb, * attach to the owner. If that fails, no harm done, we only * set the FUTEX_WAITERS bit in the user space variable. */ - return attach_to_pi_owner(uval, key, ps); + return attach_to_pi_owner(uaddr, newval, key, ps); } /** diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index bd62b5eeb5a0..31f49ae80f43 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -289,9 +289,6 @@ static void common_hrtimer_rearm(struct k_itimer *timr) { struct hrtimer *timer = &timr->it.real.timer; - if (!timr->it_interval) - return; - timr->it_overrun += hrtimer_forward(timer, timer->base->get_time(), timr->it_interval); hrtimer_restart(timer); @@ -317,7 +314,7 @@ void posixtimer_rearm(struct kernel_siginfo *info) if (!timr) return; - if (timr->it_requeue_pending == info->si_sys_private) { + if (timr->it_interval && timr->it_requeue_pending == info->si_sys_private) { timr->kclock->timer_rearm(timr); timr->it_active = 1; diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index bb015551c2d9..3d09844405c9 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -115,9 +115,7 @@ __cc-option = $(call try-run,\ # Do not attempt to build with gcc plugins during cc-option tests. # (And this uses delayed resolution so the flags will be up to date.) -# In addition, do not include the asm macros which are built later. -CC_OPTION_FILTERED = $(GCC_PLUGINS_CFLAGS) $(ASM_MACRO_FLAGS) -CC_OPTION_CFLAGS = $(filter-out $(CC_OPTION_FILTERED),$(KBUILD_CFLAGS)) +CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS)) # cc-option # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index a5b4af47987a..42c5d50f2bcc 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -4,8 +4,6 @@ OBJECT_FILES_NON_STANDARD := y hostprogs-y := modpost mk_elfconfig always := $(hostprogs-y) empty.o -CFLAGS_REMOVE_empty.o := $(ASM_MACRO_FLAGS) - modpost-objs := modpost.o file2alias.o sumversion.o devicetable-offsets-file := devicetable-offsets.h |