diff options
Diffstat (limited to 'Documentation/kbuild/modules.rst')
| -rw-r--r-- | Documentation/kbuild/modules.rst | 21 |
1 files changed, 5 insertions, 16 deletions
diff --git a/Documentation/kbuild/modules.rst b/Documentation/kbuild/modules.rst index 69fa48ee93d6..a1f3eb7a43e2 100644 --- a/Documentation/kbuild/modules.rst +++ b/Documentation/kbuild/modules.rst @@ -182,7 +182,8 @@ module 8123.ko, which is built from the following files:: 8123_pci.c 8123_bin.o_shipped <= Binary blob ---- 3.1 Shared Makefile +3.1 Shared Makefile +------------------- An external module always includes a wrapper makefile that supports building the module using "make" with no arguments. @@ -331,7 +332,7 @@ according to the following rule: There are two notable exceptions to this rule: larger subsystems have their own directory under include/, such as include/scsi; and architecture specific headers are located - under arch/$(ARCH)/include/. + under arch/$(SRCARCH)/include/. 4.1 Kernel Includes ------------------- @@ -470,9 +471,9 @@ build. The syntax of the Module.symvers file is:: - <CRC> <Symbol> <Namespace> <Module> <Export Type> + <CRC> <Symbol> <Module> <Export Type> <Namespace> - 0xe1cc2a05 usb_stor_suspend USB_STORAGE drivers/usb/storage/usb-storage EXPORT_SYMBOL_GPL + 0xe1cc2a05 usb_stor_suspend drivers/usb/storage/usb-storage EXPORT_SYMBOL_GPL USB_STORAGE The fields are separated by tabs and values may be empty (e.g. if no namespace is defined for an exported symbol). @@ -528,18 +529,6 @@ build. will then do the expected and compile both modules with full knowledge of symbols from either module. - Use an extra Module.symvers file - When an external module is built, a Module.symvers file - is generated containing all exported symbols which are - not defined in the kernel. To get access to symbols - from bar.ko, copy the Module.symvers file from the - compilation of bar.ko to the directory where foo.ko is - built. During the module build, kbuild will read the - Module.symvers file in the directory of the external - module, and when the build is finished, a new - Module.symvers file is created containing the sum of - all symbols defined and not part of the kernel. - Use "make" variable KBUILD_EXTRA_SYMBOLS If it is impractical to add a top-level kbuild file, you can assign a space separated list |