From 6a5726dd6fcc330ef386016e160389e05fd0015d Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 28 Nov 2008 01:19:41 -0800 Subject: sparc64: Add save_stack_trace_tsk(). And this allows us to indicate HAVE_LATENCYTOP_SUPPORT. Signed-off-by: David S. Miller --- arch/sparc64/kernel/stacktrace.c | 32 +++++++++++++++++++++++--------- 1 file changed, 23 insertions(+), 9 deletions(-) (limited to 'arch/sparc64') diff --git a/arch/sparc64/kernel/stacktrace.c b/arch/sparc64/kernel/stacktrace.c index 4e21d4a57d3..acb12f67375 100644 --- a/arch/sparc64/kernel/stacktrace.c +++ b/arch/sparc64/kernel/stacktrace.c @@ -7,17 +7,18 @@ #include "kstack.h" -void save_stack_trace(struct stack_trace *trace) +static void __save_stack_trace(struct thread_info *tp, + struct stack_trace *trace, + bool skip_sched) { - struct thread_info *tp = task_thread_info(current); unsigned long ksp, fp; - stack_trace_flush(); - - __asm__ __volatile__( - "mov %%fp, %0" - : "=r" (ksp) - ); + if (tp == current_thread_info()) { + stack_trace_flush(); + __asm__ __volatile__("mov %%fp, %0" : "=r" (ksp)); + } else { + ksp = tp->ksp; + } fp = ksp + STACK_BIAS; do { @@ -43,8 +44,21 @@ void save_stack_trace(struct stack_trace *trace) if (trace->skip > 0) trace->skip--; - else + else if (!skip_sched || !in_sched_functions(pc)) trace->entries[trace->nr_entries++] = pc; } while (trace->nr_entries < trace->max_entries); } + +void save_stack_trace(struct stack_trace *trace) +{ + __save_stack_trace(current_thread_info(), trace, false); +} EXPORT_SYMBOL_GPL(save_stack_trace); + +void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) +{ + struct thread_info *tp = task_thread_info(tsk); + + __save_stack_trace(tp, trace, true); +} +EXPORT_SYMBOL_GPL(save_stack_trace_tsk); -- cgit v1.2.3-18-g5258