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authorChristoph Hellwig <hch@lst.de>2007-05-08 00:23:29 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:14:58 -0700
commitab1b6f03a10ba1f5638188ab06bf46e33ac3a160 (patch)
tree2dc7ce01df5d51d81e250dd9cee1b7b04627466e /arch/mips/kernel/stacktrace.c
parent7e4c3690b07f04b1942c39db358a5c8a72831daa (diff)
simplify the stacktrace code
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>
Diffstat (limited to 'arch/mips/kernel/stacktrace.c')
-rw-r--r--arch/mips/kernel/stacktrace.c22
1 files changed, 6 insertions, 16 deletions
diff --git a/arch/mips/kernel/stacktrace.c b/arch/mips/kernel/stacktrace.c
index a586aba337a..ebd9db8d1ec 100644
--- a/arch/mips/kernel/stacktrace.c
+++ b/arch/mips/kernel/stacktrace.c
@@ -31,8 +31,7 @@ static void save_raw_context_stack(struct stack_trace *trace,
}
}
-static void save_context_stack(struct stack_trace *trace,
- struct task_struct *task, struct pt_regs *regs)
+static void save_context_stack(struct stack_trace *trace, struct pt_regs *regs)
{
unsigned long sp = regs->regs[29];
#ifdef CONFIG_KALLSYMS
@@ -41,7 +40,7 @@ static void save_context_stack(struct stack_trace *trace,
if (raw_show_trace || !__kernel_text_address(pc)) {
unsigned long stack_page =
- (unsigned long)task_stack_page(task);
+ (unsigned long)task_stack_page(current);
if (stack_page && sp >= stack_page &&
sp <= stack_page + THREAD_SIZE - 32)
save_raw_context_stack(trace, sp);
@@ -54,7 +53,7 @@ static void save_context_stack(struct stack_trace *trace,
trace->entries[trace->nr_entries++] = pc;
if (trace->nr_entries >= trace->max_entries)
break;
- pc = unwind_stack(task, &sp, pc, &ra);
+ pc = unwind_stack(current, &sp, pc, &ra);
} while (pc);
#else
save_raw_context_stack(trace, sp);
@@ -64,22 +63,13 @@ static void save_context_stack(struct stack_trace *trace,
/*
* Save stack-backtrace addresses into a stack_trace buffer.
*/
-void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
+void save_stack_trace(struct stack_trace *trace)
{
struct pt_regs dummyregs;
struct pt_regs *regs = &dummyregs;
WARN_ON(trace->nr_entries || !trace->max_entries);
- if (task && task != current) {
- regs->regs[29] = task->thread.reg29;
- regs->regs[31] = 0;
- regs->cp0_epc = task->thread.reg31;
- } else {
- if (!task)
- task = current;
- prepare_frametrace(regs);
- }
-
- save_context_stack(trace, task, regs);
+ prepare_frametrace(regs);
+ save_context_stack(trace, regs);
}