Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1230229

Re: [PATCH 1/2] kernel/trace: call helper function to check global_trace

Show all headers | View raw

On Tue, 22 Sep 2015 21:43:12 +0800
Yaowei Bai <bywxiaobai@163.com> wrote:

> Use helper function tracing_is_enabled() to check if global_trace
> has been disabled.

Actually, I prefer not to.

> 
> No functional change.
> 
> Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
> ---
>  kernel/trace/trace.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index 6e79408..b0bd322a 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -7111,7 +7111,7 @@ __init static int tracer_alloc_buffers(void)
>  		goto out_free_savedcmd;
>  	}
>  
> -	if (global_trace.buffer_disabled)
> +	if (!tracing_is_enabled())

Yes, the above is functionally equivalent. But tracing_is_enabled() is
not a "helper function" but actually an external interface for other
parts of the tracing system.

The above code is the actual setup of the tracing infrastructure, that
is used to allocate the tracing buffers. They may now use the same
logic, but there's no guarantee that it will in the future.

-- Steve


>  		tracing_off();
>  
>  	if (trace_boot_clock) {

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 1/2] kernel/trace: call helper function to check global_trace Yaowei Bai <bywxiaobai@163.com> - 2015-09-22 15:50 +0200
  Re: [PATCH 1/2] kernel/trace: call helper function to check  global_trace Steven Rostedt <rostedt@goodmis.org> - 2015-09-22 16:00 +0200
    Re: [PATCH 1/2] kernel/trace: call helper function to check  global_trace Yaowei Bai <bywxiaobai@163.com> - 2015-09-23 16:00 +0200

csiph-web