linux-kernel - Re: [PATCH 1/1] drivers/edac/edac_module.c: remove unnecessary test on unsigned value

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Date:	Tue, 10 Jun 2014 20:27:19 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Fabian Frederick <fabf@...net.be>
Cc:	linux-kernel@...r.kernel.org,
	Doug Thompson <dougthompson@...ssion.com>
Subject: Re: [PATCH 1/1] drivers/edac/edac_module.c: remove unnecessary test
 on unsigned value

On Mon, Jun 09, 2014 at 09:20:18PM +0200, Fabian Frederick wrote:
> unsigned long value is never < 0
> 
> Cc: Doug Thompson <dougthompson@...ssion.com>
> Cc: Borislav Petkov <bp@...en8.de>
> Signed-off-by: Fabian Frederick <fabf@...net.be>
> ---
>  drivers/edac/edac_module.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/edac/edac_module.c b/drivers/edac/edac_module.c
> index a66941f..e6d1691 100644
> --- a/drivers/edac/edac_module.c
> +++ b/drivers/edac/edac_module.c
> @@ -28,7 +28,7 @@ static int edac_set_debug_level(const char *buf, struct kernel_param *kp)
>  	if (ret)
>  		return ret;
>  
> -	if (val < 0 || val > 4)
> +	if (val > 4)
>  		return -EINVAL;

Ok, so I don't know how you caught this but FWIW, we have those W= build
switches which trigger it too (which is a good thing that we have them
:-))

$ make W=1 drivers/edac/edac_module.o

...

drivers/edac/edac_module.c: In function ‘edac_set_debug_level’:
drivers/edac/edac_module.c:31:2: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
  if (val < 0 || val > 4)

Applied, thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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