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From: Steven Rostedt <rostedt@goodmis.org>
To: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH 1/4] ftrace: Simplify glob handling in unregister_ftrace_function_probe_func()
Date: Mon, 15 May 2017 13:22:10 -0400	[thread overview]
Message-ID: <20170515132210.5efab11c@gandalf.local.home> (raw)
In-Reply-To: <95a1ae9c5dc472fa8b23c0f2ce0ad8276f35d30e.1494702964.git.naveen.n.rao@linux.vnet.ibm.com>

On Sun, 14 May 2017 01:01:01 +0530
"Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com> wrote:

> Handle a NULL glob properly.
> 
> Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
> ---
>  kernel/trace/ftrace.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index 39dca4e86a94..28dc824ad072 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -4144,9 +4144,9 @@ unregister_ftrace_function_probe_func(char *glob, struct trace_array *tr,
>  	int i, ret = -ENODEV;
>  	int size;
>  
> -	if (glob && (strcmp(glob, "*") == 0 || !strlen(glob)))
> +	if (!glob || (glob && (strcmp(glob, "*") == 0 || !strlen(glob))))

Actually, this can also be simplified.

	if (!glob || strcmp(glob, "*") == 0) || !strlen(glob))

No need to check if glob exists past the first expression.

-- Steve

>  		func_g.search = NULL;
> -	else if (glob) {
> +	else {
>  		int not;
>  
>  		func_g.type = filter_parse_regex(glob, strlen(glob),

  reply	other threads:[~2017-05-15 17:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-13 19:31 [PATCH 0/4] ftrace: Fix a few issues Naveen N. Rao
2017-05-13 19:31 ` [PATCH 1/4] ftrace: Simplify glob handling in unregister_ftrace_function_probe_func() Naveen N. Rao
2017-05-15 17:22   ` Steven Rostedt [this message]
2017-05-16  8:07     ` Naveen N. Rao
2017-05-13 19:31 ` [PATCH 2/4] ftrace/instances: Clear function triggers when removing instances Naveen N. Rao
2017-05-15 15:21   ` Steven Rostedt
2017-05-15 16:11     ` Steven Rostedt
2017-05-16 16:11       ` Masami Hiramatsu
2017-05-16  2:20   ` Steven Rostedt
2017-05-16 14:01     ` Naveen N. Rao
2017-05-16 17:44       ` Naveen N. Rao
2017-05-16 18:33         ` Steven Rostedt
2017-06-06 17:06           ` Shuah Khan
2017-06-06 17:37             ` Naveen N. Rao
2017-05-13 19:31 ` [PATCH 3/4] selftests/ftrace: Fix bashisms Naveen N. Rao
2017-05-15 15:16   ` Steven Rostedt
2017-05-16 14:25     ` Masami Hiramatsu
2017-05-13 19:31 ` [PATCH 4/4] selftests/ftrace: Add test to remove instance with active event triggers Naveen N. Rao

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