filemap: Add folio_put_wait_locked()

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Convert all three callers of put_and_wait_on_page_locked() to
folio_put_wait_locked().  This shrinks the kernel overall by 19 bytes.
filemap_update_page() shrinks by 19 bytes while __migration_entry_wait()
is unchanged.  folio_put_wait_locked() is 14 bytes smaller than
put_and_wait_on_page_locked(), but pmd_migration_entry_wait() grows by
14 bytes.  It removes the assumption from pmd_migration_entry_wait()
that pages cannot be larger than a PMD (which is true today, but
may be interesting to explore in the future).

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>

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Matthew Wilcox (Oracle) 2021-08-16 23:36:31 -04:00

parent 5bf34d7c7f

commit 9f2b04a25a

3 changed files with 26 additions and 24 deletions

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2

include/linux/pagemap.h

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27

mm/filemap.c

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21

mm/migrate.c

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