linux-kernel - [PATCH] kernel-audit: Delete unnecessary checks before two function calls

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Date:	Sun, 15 Nov 2015 12:42:52 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Eric Paris <eparis@...hat.com>, Paul Moore <paul@...l-moore.com>,
	linux-audit@...hat.com
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] kernel-audit: Delete unnecessary checks before two function
 calls

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 15 Nov 2015 12:38:33 +0100

The functions consume_skb() and kfree_skb() test whether their argument
is NULL and then return immediately.
Thus the tests around their calls are not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 kernel/audit.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index 5ffcbd3..1e8e228 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -509,8 +509,7 @@ static void flush_hold_queue(void)
 	 * if auditd just disappeared but we
 	 * dequeued an skb we need to drop ref
 	 */
-	if (skb)
-		consume_skb(skb);
+	consume_skb(skb);
 }
 
 static int kauditd_thread(void *dummy)
@@ -1232,9 +1231,7 @@ static void audit_buffer_free(struct audit_buffer *ab)
 	if (!ab)
 		return;
 
-	if (ab->skb)
-		kfree_skb(ab->skb);
-
+	kfree_skb(ab->skb);
 	spin_lock_irqsave(&audit_freelist_lock, flags);
 	if (audit_freelist_count > AUDIT_MAXFREE)
 		kfree(ab);
-- 
2.6.2

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