linux-kernel - [PATCH] staging: lustre: acl: fix ifnullfree.cocci warnings

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Message-ID: <20151109194350.GA117144@cairo>
Date:	Tue, 10 Nov 2015 03:43:50 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Shivani Bhardwaj <shivanib134@...il.com>
Cc:	kbuild-all@...org, gregkh@...uxfoundation.org,
	andreas.dilger@...el.com, oleg.drokin@...el.com,
	lustre-devel@...ts.lustre.org, linux-kernel@...r.kernel.org,
	devel@...verdev.osuosl.org
Subject: [PATCH] staging: lustre: acl: fix ifnullfree.cocci warnings

drivers/staging/lustre/lustre/llite/xattr.c:199:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values.

 NULL check before some freeing functions is not needed.

 Based on checkpatch warning
 "kfree(NULL) is safe this check is probably not required"
 and kfreeaddr.cocci by Julia Lawall.

Generated by: scripts/coccinelle/free/ifnullfree.cocci

CC: Shivani Bhardwaj <shivanib134@...il.com>
Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
---

 xattr.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/staging/lustre/lustre/llite/xattr.c
+++ b/drivers/staging/lustre/lustre/llite/xattr.c
@@ -192,11 +192,10 @@ int ll_setxattr_common(struct inode *ino
 			 valid, name, pv, size, 0, flags,
 			 ll_i2suppgid(inode), &req);
 #ifdef CONFIG_FS_POSIX_ACL
-	if (new_value != NULL)
 		/*
 		 * Release the posix ACL space.
 		 */
-		kfree(new_value);
+	kfree(new_value);
 	if (acl != NULL)
 		lustre_ext_acl_xattr_free(acl);
 #endif
--
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