diff options
| author | Markus Metzger <markus.t.metzger@intel.com> | 2009-02-24 13:55:18 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-24 18:23:34 +0100 |
| commit | 5e01cb695d29619dd551bac7d6aa4ef1dc8ebc95 (patch) | |
| tree | 441e5401fe99fbf75468b3245c77db34fc6aef58 /kernel/trace | |
| parent | a7f4463e0300b5135c0f0caf7c34a0529405f986 (diff) | |
x86, ftrace: fix section mismatch in hw-branch-tracer
Fix an invalid memory reference problem when cpu hotplug support is
disabled and the hw-branch-tracer is set as current tracer.
Initializing the tracer calls bts_trace_init() which has already
been freed at this time.
Reported-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_hw_branches.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/trace/trace_hw_branches.c b/kernel/trace/trace_hw_branches.c index 3561aace075..3335e807144 100644 --- a/kernel/trace/trace_hw_branches.c +++ b/kernel/trace/trace_hw_branches.c @@ -127,20 +127,18 @@ static struct notifier_block bts_hotcpu_notifier __cpuinitdata = { .notifier_call = bts_hotcpu_handler }; -static int __cpuinit bts_trace_init(struct trace_array *tr) +static int bts_trace_init(struct trace_array *tr) { hw_branch_trace = tr; - register_hotcpu_notifier(&bts_hotcpu_notifier); bts_trace_start(tr); return 0; } -static void __cpuinit bts_trace_reset(struct trace_array *tr) +static void bts_trace_reset(struct trace_array *tr) { bts_trace_stop(tr); - unregister_hotcpu_notifier(&bts_hotcpu_notifier); } static void bts_trace_print_header(struct seq_file *m) @@ -299,6 +297,7 @@ struct tracer bts_tracer __read_mostly = __init static int init_bts_trace(void) { + register_hotcpu_notifier(&bts_hotcpu_notifier); return register_tracer(&bts_tracer); } device_initcall(init_bts_trace); |