---

yaml
---
r: 180556
b: refs/heads/master
c: e04984c
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4b505db9c4c72dbd2a8e66b8d681640101325af6
+refs/heads/master: e04984c8394b17bab85c28956ada6aba81cdf746

trunk/include/linux/hw_breakpoint.h

@@ -44,7 +44,7 @@ static inline int hw_breakpoint_type(struct perf_event *bp)
 	return bp->attr.bp_type;
 }
 
-static inline int hw_breakpoint_len(struct perf_event *bp)
+static inline unsigned long hw_breakpoint_len(struct perf_event *bp)
 {
 	return bp->attr.bp_len;
 }

trunk/include/linux/perf_event.h

@@ -211,11 +211,9 @@ struct perf_event_attr {
 		__u32		wakeup_watermark; /* bytes before wakeup   */
 	};
 
-	__u32			__reserved_2;
-
-	__u64			bp_addr;
 	__u32			bp_type;
-	__u32			bp_len;
+	__u64			bp_addr;
+	__u64			bp_len;
 };
 
 /*

trunk/kernel/hw_breakpoint.c

@@ -360,8 +360,8 @@ EXPORT_SYMBOL_GPL(register_user_hw_breakpoint);
 int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr)
 {
 	u64 old_addr = bp->attr.bp_addr;
+	u64 old_len = bp->attr.bp_len;
 	int old_type = bp->attr.bp_type;
-	int old_len = bp->attr.bp_len;
 	int err = 0;
 
 	perf_event_disable(bp);

trunk/kernel/perf_event.c

@@ -4580,7 +4580,7 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr,
 	if (attr->type >= PERF_TYPE_MAX)
 		return -EINVAL;
 
-	if (attr->__reserved_1 || attr->__reserved_2)
+	if (attr->__reserved_1)
 		return -EINVAL;
 
 	if (attr->sample_type & ~(PERF_SAMPLE_MAX-1))

trunk/kernel/trace/trace_kprobe.c

@@ -689,7 +689,7 @@ static int create_trace_probe(int argc, char **argv)
 			return -EINVAL;
 		}
 		/* an address specified */
-		ret = strict_strtoul(&argv[0][2], 0, (unsigned long *)&addr);
+		ret = strict_strtoul(&argv[1][0], 0, (unsigned long *)&addr);
 		if (ret) {
 			pr_info("Failed to parse address.\n");
 			return ret;

trunk/kernel/trace/trace_stack.c

@@ -157,6 +157,7 @@ stack_max_size_write(struct file *filp, const char __user *ubuf,
 	unsigned long val, flags;
 	char buf[64];
 	int ret;
+	int cpu;
 
 	if (count >= sizeof(buf))
 		return -EINVAL;
@@ -171,9 +172,20 @@ stack_max_size_write(struct file *filp, const char __user *ubuf,
 		return ret;
 
 	local_irq_save(flags);
+
+	/*
+	 * In case we trace inside arch_spin_lock() or after (NMI),
+	 * we will cause circular lock, so we also need to increase
+	 * the percpu trace_active here.
+	 */
+	cpu = smp_processor_id();
+	per_cpu(trace_active, cpu)++;
+
 	arch_spin_lock(&max_stack_lock);
 	*ptr = val;
 	arch_spin_unlock(&max_stack_lock);
+
+	per_cpu(trace_active, cpu)--;
 	local_irq_restore(flags);
 
 	return count;
@@ -206,7 +218,13 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
 
 static void *t_start(struct seq_file *m, loff_t *pos)
 {
+	int cpu;
+
 	local_irq_disable();
+
+	cpu = smp_processor_id();
+	per_cpu(trace_active, cpu)++;
+
 	arch_spin_lock(&max_stack_lock);
 
 	if (*pos == 0)
@@ -217,7 +235,13 @@ static void *t_start(struct seq_file *m, loff_t *pos)
 
 static void t_stop(struct seq_file *m, void *p)
 {
+	int cpu;
+
 	arch_spin_unlock(&max_stack_lock);
+
+	cpu = smp_processor_id();
+	per_cpu(trace_active, cpu)--;
+
 	local_irq_enable();
 }
 

trunk/tools/perf/builtin-top.c

@@ -705,7 +705,7 @@ static void print_mapped_keys(void)
 		fprintf(stdout, "\t[w]     toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
 
 	fprintf(stdout,
-		"\t[K]     hide kernel_symbols symbols.             \t(%s)\n",
+		"\t[K]     hide kernel_symbols symbols.     \t(%s)\n",
 		hide_kernel_symbols ? "yes" : "no");
 	fprintf(stdout,
 		"\t[U]     hide user symbols.               \t(%s)\n",

trunk/tools/perf/util/event.c

@@ -295,10 +295,10 @@ void thread__find_addr_location(struct thread *self,
 	al->thread = self;
 	al->addr = addr;
 
-	if (cpumode & PERF_RECORD_MISC_KERNEL) {
+	if (cpumode == PERF_RECORD_MISC_KERNEL) {
 		al->level = 'k';
 		mg = &session->kmaps;
-	} else if (cpumode & PERF_RECORD_MISC_USER)
+	} else if (cpumode == PERF_RECORD_MISC_USER)
 		al->level = '.';
 	else {
 		al->level = 'H';