linux-kernel - [PATCH] ext2/ext3:useless code for return value

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Date:	Thu, 06 May 2010 21:36:21 +0800
From:	"潘卫平(Peter Pan)" <wppan@...flag-linux.com>
To:	tj@...nel.org, Christoph Lameter <cl@...ux-foundation.org>,
	hch@....de, akpm@...ux-foundation.org, adilger@....com
CC:	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH] ext2/ext3:useless code for return value


When rsv is the right hand side of goal, we should return NULL,
because now rsv's prev is NULL, or we return rsv.

Signed-off-by: Peter Pan(潘卫平) <wppan@...flag-linux.com>

---
 fs/ext2/balloc.c |    6 +-----
 fs/ext3/balloc.c |    6 +-----
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 3cf038c..023990f 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -323,11 +323,7 @@ search_reserve_window(struct rb_root *root,
ext2_fsblk_t goal)
 	 * side of the interval containing the goal.  If it's the RHS,
 	 * we need to back up one.
 	 */
-	if (rsv->rsv_start > goal) {
-		n = rb_prev(&rsv->rsv_node);
-		rsv = rb_entry(n, struct ext2_reserve_window_node, rsv_node);
-	}
-	return rsv;
+    return (rsv->rsv_start < goal) ? rsv : NULL;
 }

 /*
diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index a177122..bfa62e9 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -310,11 +310,7 @@ search_reserve_window(struct rb_root *root,
ext3_fsblk_t goal)
 	 * side of the interval containing the goal.  If it's the RHS,
 	 * we need to back up one.
 	 */
-	if (rsv->rsv_start > goal) {
-		n = rb_prev(&rsv->rsv_node);
-		rsv = rb_entry(n, struct ext3_reserve_window_node, rsv_node);
-	}
-	return rsv;
+    return (rsv->rsv_start < goal) ? rsv : NULL;
 }

 /**
-- 
1.6.6


-- 
Peter Pan(潘卫平)
Red Flag Software Co.,Ltd
--
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