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Commit 540ad6b6 authored by Linus Torvalds's avatar Linus Torvalds
Browse files
parents 2fa82e1f ba773f7c
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+7 −2
Original line number Diff line number Diff line
@@ -572,7 +572,6 @@ static int __kgdb_notify(struct die_args *args, unsigned long cmd)
	return NOTIFY_STOP;
}

#ifdef CONFIG_KGDB_LOW_LEVEL_TRAP
int kgdb_ll_trap(int cmd, const char *str,
		 struct pt_regs *regs, long err, int trap, int sig)
{
@@ -590,7 +589,6 @@ int kgdb_ll_trap(int cmd, const char *str,

	return __kgdb_notify(&args, cmd);
}
#endif /* CONFIG_KGDB_LOW_LEVEL_TRAP */

static int
kgdb_notify(struct notifier_block *self, unsigned long cmd, void *ptr)
@@ -625,6 +623,12 @@ int kgdb_arch_init(void)
	return register_die_notifier(&kgdb_notifier);
}

static void kgdb_hw_overflow_handler(struct perf_event *event, int nmi,
		struct perf_sample_data *data, struct pt_regs *regs)
{
	kgdb_ll_trap(DIE_DEBUG, "debug", regs, 0, 0, SIGTRAP);
}

void kgdb_arch_late(void)
{
	int i, cpu;
@@ -655,6 +659,7 @@ void kgdb_arch_late(void)
		for_each_online_cpu(cpu) {
			pevent = per_cpu_ptr(breakinfo[i].pev, cpu);
			pevent[0]->hw.sample_period = 1;
			pevent[0]->overflow_handler = kgdb_hw_overflow_handler;
			if (pevent[0]->destroy != NULL) {
				pevent[0]->destroy = NULL;
				release_bp_slot(*pevent);