x86/process: Avoid unnecessary NULL check in get_wchan()
Task 'p' is always guaranteed to be non-NULL, because the only call sites are in fs/proc/ which all guarantee a non-NULL task pointer. [ mingo: Improved the changelog. ] Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1542798734-12532-1-git-send-email-laoar.shao@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -730,7 +730,7 @@ unsigned long get_wchan(struct task_struct *p)
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unsigned long start, bottom, top, sp, fp, ip, ret = 0;
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unsigned long start, bottom, top, sp, fp, ip, ret = 0;
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int count = 0;
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int count = 0;
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if (!p || p == current || p->state == TASK_RUNNING)
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if (p == current || p->state == TASK_RUNNING)
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return 0;
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return 0;
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if (!try_get_task_stack(p))
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if (!try_get_task_stack(p))
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