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mm/gup: small refactoring: simplify try_grab_page()

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try_grab_page() does the same thing as try_grab_compound_head(..., refs=1,
...), just with a different API.  So there is a lot of code duplication
there.

Change try_grab_page() to call try_grab_compound_head(), while keeping the
API contract identical for callers.

Also, now that try_grab_compound_head() always has a caller, remove the
__maybe_unused annotation.

Link: https://lkml.kernel.org/r/20210813044133.1536842-3-jhubbard@nvidia.com
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
John Hubbard
2021-09-02 14:53:51 -07:00
committed by Linus Torvalds
parent 3967db22ba
commit 54d516b1d6
2 changed files with 7 additions and 32 deletions
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4
include/linux/mm.h
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@@ -1214,8 +1214,8 @@ static inline void get_page(struct page *page)
}
bool __must_check try_grab_page(struct page *page, unsigned int flags);
__maybe_unused struct page *try_grab_compound_head(struct page *page, int refs,
unsigned int flags);
struct page *try_grab_compound_head(struct page *page, int refs,
unsigned int flags);
static inline __must_check bool try_get_page(struct page *page)