linux-kernel - Re: [PATCH] trace: Fix some checker warnings

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Date:   Sun, 4 Dec 2022 21:39:29 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Cc:     kernel test robot <lkp@...el.com>,
        David Howells <dhowells@...hat.com>,
        oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] trace: Fix some checker warnings

On Mon, 5 Dec 2022 11:22:36 +0900
Masami Hiramatsu (Google) <mhiramat@...nel.org> wrote:

> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index 5cfc95a52bc3..14f18edfe5bc 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -6572,7 +6572,8 @@ tracing_thresh_write(struct file *filp, const char __user *ubuf,
>  	return ret;
>  }
>  
> -#if defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER)
> +#if defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER) \
> +	|| defined(CONFIG_OSNOISE_TRACER)
>  

When it gets this much, we need to put it into the trace.h header and
define it. Actually, we have something that handles this too.

#if (defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER) \
        || defined(CONFIG_OSNOISE_TRACER)) && defined(CONFIG_FSNOTIFY)
#define LATENCY_FS_NOTIFY
#endif


We can add:

 #if (defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER) \
	|| defined(CONFIG_OSNOISE_TRACER)) && defined(CONFIG_FSNOTIFY)
 #define LATENCY_FS_NOTIFY
+#define USES_MAX_TRACE
 #endif

And use that instead.

-- Steve