lkml.org 
[lkml]   [2016]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[RFC][PATCH 01/12] perf: Add lockdep assertions

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
kernel/events/core.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -1246,6 +1246,8 @@ ctx_group_list(struct perf_event *event,
static void
list_add_event(struct perf_event *event, struct perf_event_context *ctx)
{
+ lockdep_assert_held(&ctx->lock);
+
WARN_ON_ONCE(event->attach_state & PERF_ATTACH_CONTEXT);
event->attach_state |= PERF_ATTACH_CONTEXT;

@@ -2342,8 +2344,10 @@ static void ctx_sched_out(struct perf_ev
struct perf_cpu_context *cpuctx,
enum event_type_t event_type)
{
- struct perf_event *event;
int is_active = ctx->is_active;
+ struct perf_event *event;
+
+ lockdep_assert_held(&ctx->lock);

ctx->is_active &= ~event_type;
if (likely(!ctx->nr_events))
@@ -2725,8 +2729,10 @@ ctx_sched_in(struct perf_event_context *
enum event_type_t event_type,
struct task_struct *task)
{
- u64 now;
int is_active = ctx->is_active;
+ u64 now;
+
+ lockdep_assert_held(&ctx->lock);

ctx->is_active |= event_type;
if (likely(!ctx->nr_events))

\
 
 \ /
  Last update: 2016-01-11 18:01    [W:0.176 / U:0.172 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site