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authorNick Piggin <npiggin@suse.de>2007-10-16 01:24:41 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:42:53 -0700
commit45726cb43d11b288c58243a26010f397054222f0 (patch)
treeae1804a34f314be18865add063d660cf783e45be /mm/swap_state.c
parent001281881067a5998384c6669bc8dbbbab8456c4 (diff)
downloadvexpress-lsk-45726cb43d11b288c58243a26010f397054222f0.tar.gz
mm: improve find_lock_page
find_lock_page does not need to recheck ->index because if the page is in the right mapping then the index must be the same. Also, tree_lock does not need to be retaken after the page is locked in order to test that ->mapping has not changed, because holding the page lock pins its mapping. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap_state.c')
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