commit 45726cb43d11b288c58243a26010f397054222f0
author Nick Piggin <npiggin@suse.de> Tue Oct 16 01:24:41 2007 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> Tue Oct 16 09:42:53 2007 -0700
tree ae1804a34f314be18865add063d660cf783e45be
parent 001281881067a5998384c6669bc8dbbbab8456c4

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>