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simplify the stacktrace code

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Simplify the stacktrace code:

 - remove the unused task argument to save_stack_trace, it's always
   current
 - remove the all_contexts flag, it's alwasy 0

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Andi Kleen <ak@suse.de>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig
2007-05-08 00:23:29 -07:00
committed by Linus Torvalds
parent 7e4c3690b0
commit ab1b6f03a1
8 changed files with 28 additions and 61 deletions
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18
arch/s390/kernel/stacktrace.c
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@@ -59,7 +59,7 @@ static unsigned long save_context_stack(struct stack_trace *trace,
}
}
void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
void save_stack_trace(struct stack_trace *trace)
{
register unsigned long sp asm ("15");
unsigned long orig_sp, new_sp;
@@ -69,20 +69,16 @@ void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
new_sp = save_context_stack(trace, &trace->skip, orig_sp,
S390_lowcore.panic_stack - PAGE_SIZE,
S390_lowcore.panic_stack);
if ((new_sp != orig_sp) && !trace->all_contexts)
if (new_sp != orig_sp)
return;
new_sp = save_context_stack(trace, &trace->skip, new_sp,
S390_lowcore.async_stack - ASYNC_SIZE,
S390_lowcore.async_stack);
if ((new_sp != orig_sp) && !trace->all_contexts)
if (new_sp != orig_sp)
return;
if (task)
save_context_stack(trace, &trace->skip, new_sp,
(unsigned long) task_stack_page(task),
(unsigned long) task_stack_page(task) + THREAD_SIZE);
else
save_context_stack(trace, &trace->skip, new_sp,
S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);
save_context_stack(trace, &trace->skip, new_sp,
S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);
return;
}