commit f45840b5c128445da70e7ec33adc47b4a12bdaf4
author Nick Piggin <npiggin@suse.de> Sat Oct 18 20:26:57 2008 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Mon Oct 20 08:52:31 2008 -0700
tree 3815a03d12d1c69d71a48c44cd216c3e1e84272a
parent 9978ad583e100945b74e4f33e73317983ea32df9

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>