linux-kernel - [PATCH] Add unlikely to page condition

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Date:	Sun, 10 Jul 2011 01:24:57 +0530
From:	Raghavendra D Prabhu <rprabhu@...hang.net>
To:	viro@...iv.linux.org.uk
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] Add unlikely to page condition

Hi, 
     Added an unlikely to the page check since page will more likely be
     in the page cache because of page_cache_sync_readahead before it. 

Signed-off-by: Raghavendra D Prabhu <rprabhu@...hang.net>
---
  fs/splice.c |    2 +-
  1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/splice.c b/fs/splice.c
index aa866d3..f0e591a 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -349,7 +349,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
  		 * the first hole.
  		 */
  		page = find_get_page(mapping, index);
-		if (!page) {
+		if (unlikely(!page)) {
  			/*
  			 * page didn't exist, allocate one.
  			 */
-- 
1.7.6

--------------------------
Raghavendra Prabhu
GPG Id : 0xD72BE977
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www: wnohang.net
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