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(parent: 0012818) | patch
mm: improve find_lock_page
authorNick Piggin <npiggin@suse.de>
Tue, 16 Oct 2007 08:24:41 +0000 (01:24 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 16 Oct 2007 16:42:53 +0000 (09:42 -0700)
commit45726cb43d11b288c58243a26010f397054222f0
treeae1804a34f314be18865add063d660cf783e45betree | snapshot
parent001281881067a5998384c6669bc8dbbbab8456c4commit | diff
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>
mm/filemap.c diff | blob | history
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