From: Dan Carpenter <dan.carpenter@oracle.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Frederic Weisbecker <fweisbec@gmail.com>,
Namhyung Kim <namhyung@gmail.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Clemens Ladisch <clemens@ladisch.de>,
linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] x86, dumpstack: removed unneeded check in dump_trace()
Date: Sat, 28 Jan 2012 13:52:46 +0300 [thread overview]
Message-ID: <20120128105246.GA25092@elgon.mountain> (raw)
Smatch complains that we have some inconsistent NULL checking. If
"task" were NULL then it would lead to a NULL dereference later. We
can remove this test because earlier on in the function we have:
if (!task)
task = current;
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 6d728d9..af7785f 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -129,7 +129,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
if (!stack) {
if (regs)
stack = (unsigned long *)regs->sp;
- else if (task && task != current)
+ else if (task != current)
stack = (unsigned long *)task->thread.sp;
else
stack = &dummy;
next reply other threads:[~2012-01-28 10:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-28 10:52 Dan Carpenter [this message]
2012-01-28 11:00 ` [patch] x86, dumpstack: removed unneeded check in dump_trace() Frederic Weisbecker
2012-01-30 13:20 ` [tip:perf/urgent] x86/dumpstack: Remove " tip-bot for Dan Carpenter
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