From ab1b6f03a10ba1f5638188ab06bf46e33ac3a160 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 8 May 2007 00:23:29 -0700 Subject: 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 Cc: Paul Mundt Cc: Ralf Baechle Cc: Martin Schwidefsky Cc: "David S. Miller" Cc: Andi Kleen Cc: Akinobu Mita Acked-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/mips/kernel/stacktrace.c | 22 ++++++---------------- 1 file changed, 6 insertions(+), 16 deletions(-) (limited to 'arch/mips/kernel/stacktrace.c') diff --git a/arch/mips/kernel/stacktrace.c b/arch/mips/kernel/stacktrace.c index a586aba337a7..ebd9db8d1ece 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); } -- cgit v1.2.1