From bbfbb7cec9dd7266534b2b4b9c8be2fa425bbfc9 Mon Sep 17 00:00:00 2001
From: Nikita Danilov <nikita@clusterfs.com>
Date: Fri, 6 Jan 2006 00:11:08 -0800
Subject: [PATCH] [PATCH] find_lock_page(): call __lock_page() directly.

As find_lock_page() already checks with TestSetPageLocked() that page is
locked, there is no need to call lock_page() that will try-lock page again
(chances of page being unlocked in between are small).  Call __lock_page()
directly, this saves one atomic operation.

Also, mark truncate-while-slept path as unlikely while we are here.

(akpm: ug.  But this is actually a common path for normal old read()s against
a page which is under readahead I/O so ho-hum.)

Signed-off-by: Nikita Danilov <danilov@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
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