diff options
| author | Michal Hocko <mhocko@suse.com> | 2017-04-07 12:51:20 -0400 |
|---|---|---|
| committer | Jérôme Glisse <jglisse@redhat.com> | 2017-08-09 18:13:29 -0400 |
| commit | 6919ecb4df5359f808c0443cce830f3f5006b870 (patch) | |
| tree | 60ef31272efdb5a0530c14d7df87613552c2153a /include | |
| parent | aead1efa0289344cbf91161d4fc882ae7ee28bbf (diff) | |
mm/memory_hotplug: introduce add_pages
There are new users of memory hotplug emerging. Some of them require
different subset of arch_add_memory. There are some which only require
allocation of struct pages without mapping those pages to the kernel
address space. We currently have __add_pages for that purpose. But this
is rather lowlevel and not very suitable for the code outside of the
memory hotplug. E.g. x86_64 wants to update max_pfn which should be
done by the caller. Introduce add_pages() which should care about those
details if they are needed. Each architecture should define its
implementation and select CONFIG_ARCH_HAS_ADD_PAGES. All others use
the currently existing __add_pages.
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/memory_hotplug.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index c8a5056a5ae0..0c19c38b7f20 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -133,6 +133,17 @@ extern int __remove_pages(struct zone *zone, unsigned long start_pfn, extern int __add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, bool want_memblock); +#ifndef CONFIG_ARCH_HAS_ADD_PAGES +static inline int add_pages(int nid, unsigned long start_pfn, + unsigned long nr_pages, bool want_memblock) +{ + return __add_pages(nid, start_pfn, nr_pages, want_memblock); +} +#else /* ARCH_HAS_ADD_PAGES */ +int add_pages(int nid, unsigned long start_pfn, + unsigned long nr_pages, bool want_memblock); +#endif /* ARCH_HAS_ADD_PAGES */ + #ifdef CONFIG_NUMA extern int memory_add_physaddr_to_nid(u64 start); #else |