tree 3815a03d12d1c69d71a48c44cd216c3e1e84272a
parent 9978ad583e100945b74e4f33e73317983ea32df9
author Nick Piggin <npiggin@suse.de> 1224386817 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1224517951 -0700

mm: pagecache insertion fewer atomics

Setting and clearing the page locked when inserting it into swapcache /
pagecache when it has no other references can use non-atomic page flags
operations because no other CPU may be operating on it at this time.

This saves one atomic operation when inserting a page into pagecache.

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>