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[PARISC] be more defensive in process.c::get_wchan 

While debugging, I noticed we don't check the task_struct arg passed to
get_wchan, whereas everyone else does.

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Kyle McMartin 2007-05-30 02:36:00 -04:00 committed by Kyle McMartin
parent 376e210b71
commit cc650a7a9f
1 changed files with 4 additions and 0 deletions
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4
arch/parisc/kernel/process.c
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@ -381,6 +381,10 @@ get_wchan(struct task_struct *p)
struct unwind_frame_info info;
unsigned long ip;
int count = 0;
if (!p || p == current || p->state == TASK_RUNNING)
return 0;
/*
* These bracket the sleeping functions..
*/