linux-kernel - Re: [PATCH 08/14] tracing: Switch trace_events

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Message-ID: <20241220083829.1e1aa9d3@gandalf.local.home>
Date: Fri, 20 Dec 2024 08:38:29 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland
 <mark.rutland@....com>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Andrew Morton <akpm@...ux-foundation.org>, Peter Zijlstra
 <peterz@...radead.org>
Subject: Re: [PATCH 08/14] tracing: Switch trace_events_trigger.c code over
 to use guard()

On Thu, 19 Dec 2024 15:12:06 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> @@ -288,28 +280,22 @@ static ssize_t event_trigger_regex_write(struct file *file,
>  
>  	buf = memdup_user_nul(ubuf, cnt);
>  	if (IS_ERR(buf))
> -		return PTR_ERR(buf);
> +		return PTR_ERR(no_free_ptr(buf));
>  

I just realized that __free(kfree) is defined as:

  DEFINE_FREE(kfree, void *, if (!IS_ERR_OR_NULL(_T)) kfree(_T))

where it can handle IS_ERR(), so the above doesn't need that no_free_ptr(buf).

-- Steve