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authorDavid S. Miller <davem@davemloft.net>2008-11-28 01:19:41 -0800
committerDavid S. Miller <davem@davemloft.net>2008-12-04 09:17:09 -0800
commit6a5726dd6fcc330ef386016e160389e05fd0015d (patch)
tree833607b0a7be8c8946eae1d3c7cd4ee7e1224bbb /arch/sparc64/kernel
parent3a29db32220387cd66e4d02c907c8949c28c5ecb (diff)
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/kernel')
-rw-r--r--arch/sparc64/kernel/stacktrace.c32
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);