linux-kernel - [PATCH 3/4] sysfs: remove useless test from sysfs_merge

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Date:	Mon, 10 Jan 2011 16:23:24 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Dan Carpenter <error27@...il.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 3/4] sysfs: remove useless test from sysfs_merge_group

From: Alan Stern <stern@...land.harvard.edu>

Dan Carpenter pointed out that the new sysfs_merge_group() and
sysfs_unmerge_group() routines requires their grp argument to be
non-NULL, because they dereference grp to obtain the list of
attributes.  Hence it's pointless for the routines to include a test
and special-case handling for when grp is NULL.  This patch (as1433)
removes the unneeded tests.

Signed-off-by: Alan Stern <stern@...land.harvard.edu>
CC: Dan Carpenter <error27@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 fs/sysfs/group.c |   10 ++--------
 1 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 442f34f..c8769dc 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -165,10 +165,7 @@ int sysfs_merge_group(struct kobject *kobj,
 	struct attribute *const *attr;
 	int i;
 
-	if (grp)
-		dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name);
-	else
-		dir_sd = sysfs_get(kobj->sd);
+	dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name);
 	if (!dir_sd)
 		return -ENOENT;
 
@@ -195,10 +192,7 @@ void sysfs_unmerge_group(struct kobject *kobj,
 	struct sysfs_dirent *dir_sd;
 	struct attribute *const *attr;
 
-	if (grp)
-		dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name);
-	else
-		dir_sd = sysfs_get(kobj->sd);
+	dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name);
 	if (dir_sd) {
 		for (attr = grp->attrs; *attr; ++attr)
 			sysfs_hash_and_remove(dir_sd, NULL, (*attr)->name);
-- 
1.7.3.2

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