linux-kernel - [PATCH] KVM-async_pf: Delete an unnecessary check before the function call "kmem_cache

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Message-ID: <5648543E.1000202@users.sourceforge.net>
Date:	Sun, 15 Nov 2015 10:45:34 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Gleb Natapov <gleb@...nel.org>, Paolo Bonzini <pbonzini@...hat.com>
Cc:	kvm@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] KVM-async_pf: Delete an unnecessary check before the function
 call "kmem_cache_destroy"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 15 Nov 2015 10:40:36 +0100

The kmem_cache_destroy() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 virt/kvm/async_pf.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c
index 77d42be..3531599 100644
--- a/virt/kvm/async_pf.c
+++ b/virt/kvm/async_pf.c
@@ -57,8 +57,7 @@ int kvm_async_pf_init(void)
 
 void kvm_async_pf_deinit(void)
 {
-	if (async_pf_cache)
-		kmem_cache_destroy(async_pf_cache);
+	kmem_cache_destroy(async_pf_cache);
 	async_pf_cache = NULL;
 }
 
-- 
2.6.2

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