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mm/page_alloc: remove obsolete gfpflags_normal_context()

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Since commit dacb5d8875 ("tcp: fix page frag corruption on page fault"),
there's no caller of gfpflags_normal_context().  Remove it as this helper
is strictly tied to the sk page frag usage and there won't be other user
in the future.

[linmiaohe@huawei.com: fix htmldocs]
  Link: https://lkml.kernel.org/r/1bc55727-9b66-0e9e-c306-f10c4716ea89@huawei.com
Link: https://lkml.kernel.org/r/20220916072257.9639-16-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-09-16 15:22:56 +08:00 • committed by Andrew Morton
parent 896c4d5253
commit def76fd549
2 changed files with 0 additions and 26 deletions
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3
Documentation/core-api/mm-api.rst
View file

@ -19,9 +19,6 @@ User Space Memory Access
Memory Allocation Controls Memory Allocation Controls
========================== ==========================
.. kernel-doc:: include/linux/gfp.h
:internal:
.. kernel-doc:: include/linux/gfp_types.h .. kernel-doc:: include/linux/gfp_types.h
:doc: Page mobility and placement hints :doc: Page mobility and placement hints

23
include/linux/gfp.h
View file

@ -36,29 +36,6 @@ static inline bool gfpflags_allow_blocking(const gfp_t gfp_flags)
return !!(gfp_flags & __GFP_DIRECT_RECLAIM); return !!(gfp_flags & __GFP_DIRECT_RECLAIM);
} }
/**
* gfpflags_normal_context - is gfp_flags a normal sleepable context?
* @gfp_flags: gfp_flags to test
*
* Test whether @gfp_flags indicates that the allocation is from the
* %current context and allowed to sleep.
*
* An allocation being allowed to block doesn't mean it owns the %current
* context. When direct reclaim path tries to allocate memory, the
* allocation context is nested inside whatever %current was doing at the
* time of the original allocation. The nested allocation may be allowed
* to block but modifying anything %current owns can corrupt the outer
* context's expectations.
*
* %true result from this function indicates that the allocation context
* can sleep and use anything that's associated with %current.
*/
static inline bool gfpflags_normal_context(const gfp_t gfp_flags)
{
return (gfp_flags & (__GFP_DIRECT_RECLAIM | __GFP_MEMALLOC)) ==
__GFP_DIRECT_RECLAIM;
}
#ifdef CONFIG_HIGHMEM #ifdef CONFIG_HIGHMEM
#define OPT_ZONE_HIGHMEM ZONE_HIGHMEM #define OPT_ZONE_HIGHMEM ZONE_HIGHMEM
#else #else