diff options
| author | Steven Rostedt <srostedt@redhat.com> | 2008-12-17 15:43:00 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-18 12:56:56 +0100 |
| commit | e05a43b744fb9518cbf8539a7ef33164ac60a70f (patch) | |
| tree | ce45f7e86fe15b3b021cf416caa85bcf4dd38001 /kernel/trace | |
| parent | trace: add a way to enable or disable the stack tracer (diff) | |
| download | linux-e05a43b744fb9518cbf8539a7ef33164ac60a70f.tar.xz linux-e05a43b744fb9518cbf8539a7ef33164ac60a70f.zip | |
trace: better use of stack_trace_enabled for boot up code
Impact: clean up
Andrew Morton suggested to use the stack_tracer_enabled variable
to decide whether or not to start stack tracing on bootup.
This lets us remove the start_stack_trace variable.
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_stack.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index 4842c969c785..d0871bc0aca5 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -308,7 +308,7 @@ stack_trace_sysctl(struct ctl_table *table, int write, mutex_lock(&stack_sysctl_mutex); - ret = proc_dointvec(table, write, file, buffer, lenp, ppos); + ret = proc_dointvec(table, write, file, buffer, lenp, ppos); if (ret || !write || (last_stack_tracer_enabled == stack_tracer_enabled)) @@ -326,11 +326,10 @@ stack_trace_sysctl(struct ctl_table *table, int write, return ret; } -static int start_stack_trace __initdata; - static __init int enable_stacktrace(char *str) { - start_stack_trace = 1; + stack_tracer_enabled = 1; + last_stack_tracer_enabled = 1; return 1; } __setup("stacktrace", enable_stacktrace); @@ -352,10 +351,8 @@ static __init int stack_trace_init(void) if (!entry) pr_warning("Could not create debugfs 'stack_trace' entry\n"); - if (start_stack_trace) { + if (stack_tracer_enabled) register_ftrace_function(&trace_ops); - stack_tracer_enabled = 1; - } return 0; } |