linux-kernel - [PATCH v2] x86: kvm: remove NULL check before kfree

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Message-Id: <20220614133458.147314-1-dzm91@hust.edu.cn>
Date:   Tue, 14 Jun 2022 21:34:58 +0800
From:   Dongliang Mu <dzm91@...t.edu.cn>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>
Cc:     mudongliang <mudongliangabcd@...il.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] x86: kvm: remove NULL check before kfree

From: mudongliang <mudongliangabcd@...il.com>

kfree can handle NULL pointer as its argument.
According to coccinelle isnullfree check, remove NULL check
before kfree operation.

Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
---
v1->v2: modify my signature name
 arch/x86/kernel/kvm.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 1a3658f7e6d9..d4e48b4a438b 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -236,8 +236,7 @@ void kvm_async_pf_task_wake(u32 token)
 	raw_spin_unlock(&b->lock);
 
 	/* A dummy token might be allocated and ultimately not used.  */
-	if (dummy)
-		kfree(dummy);
+	kfree(dummy);
 }
 EXPORT_SYMBOL_GPL(kvm_async_pf_task_wake);
 
-- 
2.35.1