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Commit 6a5726dd authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Add save_stack_trace_tsk(). 



And this allows us to indicate HAVE_LATENCYTOP_SUPPORT.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3a29db32

arch/sparc/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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

arch/sparc64/kernel/stacktrace.c

+23 −9
Original line number Diff line number Diff line
@@ -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;



	if (tp == current_thread_info()) {

		stack_trace_flush();



	__asm__ __volatile__(

		"mov	%%fp, %0"

		: "=r" (ksp)

	);

		__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);