linux-kernel - Re: [PATCH 4/5] tools lib api fs: Add {tracefs,debugfs}

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Date:	Sun, 25 Jan 2015 18:02:03 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Olsa <jolsa@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH 4/5] tools lib api fs: Add {tracefs,debugfs}_configured()
 functions

On Sat, Jan 24, 2015 at 01:13:34PM -0500, Steven Rostedt wrote:

SNIP

>  #include <sys/mount.h>
>  #include <linux/kernel.h>
>  
> @@ -24,6 +27,16 @@ static const char * const debugfs_known_mountpoints[] = {
>  
>  static bool debugfs_found;
>  
> +bool debugfs_configured(void)
> +{
> +	struct stat st;
> +
> +	if (stat(DEBUGFS_DEFAULT_PATH, &st) < 0)
> +		return false;
> +

hum, should  this function rather do

bool debugfs_configured(void)
{
	return debugfs_find_mountpoint() != NULL;
}


SNIP

>  static bool tracefs_found;
>  
> +bool tracefs_configured(void)
> +{
> +	struct stat st;
> +
> +	if (stat(TRACEFS_DEFAULT_PATH, &st) < 0)
> +		return false;
> +
> +	return true;
> +}

same for this one..

jirka
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