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sparc64: Add save_stack_trace_tsk(). 

And this allows us to indicate HAVE_LATENCYTOP_SUPPORT.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-11-28 01:19:41 -08:00
parent 3a29db3222
commit 6a5726dd6f
2 changed files with 27 additions and 9 deletions
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4
arch/sparc/Kconfig
View File

@ -72,6 +72,10 @@ config LOCKDEP_SUPPORT
bool
default y if SPARC64
config HAVE_LATENCYTOP_SUPPORT
bool
default y if SPARC64
config AUDIT_ARCH
bool
default y if SPARC64

32
arch/sparc64/kernel/stacktrace.c
View File

@ -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);