linux-kernel - [PATCH] arch/x86/kernel/process.c: avoid unnecessary NULL check in get

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Date:   Wed, 21 Nov 2018 19:12:14 +0800
From:   Yafang Shao <laoar.shao@...il.com>
To:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Yafang Shao <laoar.shao@...il.com>
Subject: [PATCH] arch/x86/kernel/process.c: avoid unnecessary NULL check in get_wchan

Because the task p is always guaranteed to be non-NULL.

Signed-off-by: Yafang Shao <laoar.shao@...il.com>
---
 arch/x86/kernel/process.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index c93fcfd..3c3ee89 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -730,7 +730,7 @@ unsigned long get_wchan(struct task_struct *p)
 	unsigned long start, bottom, top, sp, fp, ip, ret = 0;
 	int count = 0;
 
-	if (!p || p == current || p->state == TASK_RUNNING)
+	if (p == current || p->state == TASK_RUNNING)
 		return 0;
 
 	if (!try_get_task_stack(p))
-- 
1.8.3.1