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author | Frederic Weisbecker <fweisbec@gmail.com> | 2008-11-16 05:57:26 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-11-16 07:55:23 +0100 |
commit | 1c80025a49855b12fa09bb6db71820e3367b1369 (patch) | |
tree | 063fe72ed9bb3410c3293c83a7882cecc46e7410 /kernel/trace/trace_sysprof.c | |
parent | e6e7a65aabdb696cf05a56cfd495c49a11fd4cde (diff) | |
download | kernel_samsung_tuna-1c80025a49855b12fa09bb6db71820e3367b1369.zip kernel_samsung_tuna-1c80025a49855b12fa09bb6db71820e3367b1369.tar.gz kernel_samsung_tuna-1c80025a49855b12fa09bb6db71820e3367b1369.tar.bz2 |
tracing/ftrace: change the type of the init() callback
Impact: extend the ->init() method with the ability to fail
This bring a way to know if the initialization of a tracer successed.
A tracer must return 0 on success and a traditional error (ie:
-ENOMEM) if it fails.
If a tracer fails to init, it is free to print a detailed warn. The
tracing api will not and switch to a new tracer will just return the
error from the init callback.
Note: this will be used for the return tracer.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_sysprof.c')
-rw-r--r-- | kernel/trace/trace_sysprof.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/trace_sysprof.c b/kernel/trace/trace_sysprof.c index 05f7534..54960ed 100644 --- a/kernel/trace/trace_sysprof.c +++ b/kernel/trace/trace_sysprof.c @@ -261,11 +261,12 @@ static void stop_stack_trace(struct trace_array *tr) mutex_unlock(&sample_timer_lock); } -static void stack_trace_init(struct trace_array *tr) +static int stack_trace_init(struct trace_array *tr) { sysprof_trace = tr; start_stack_trace(tr); + return 0; } static void stack_trace_reset(struct trace_array *tr) |