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| author | David S. Miller <davem@davemloft.net> | 2008-11-28 12:19:41 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-12-04 20:17:09 +0300 |
| commit | 6a5726dd6fcc330ef386016e160389e05fd0015d (patch) | |
| tree | 833607b0a7be8c8946eae1d3c7cd4ee7e1224bbb /arch/sparc64 | |
| parent | 3a29db32220387cd66e4d02c907c8949c28c5ecb (diff) | |
| download | linux-6a5726dd6fcc330ef386016e160389e05fd0015d.tar.xz | |
sparc64: Add save_stack_trace_tsk().
And this allows us to indicate HAVE_LATENCYTOP_SUPPORT.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
| -rw-r--r-- | arch/sparc64/kernel/stacktrace.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/arch/sparc64/kernel/stacktrace.c b/arch/sparc64/kernel/stacktrace.c index 4e21d4a57d3b..acb12f673757 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); |