linux-kernel - Re: [PATCH] Staging: octeon-usb: fixed a macro coding style issue

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Message-ID: <20140425142133.GA14201@kroah.com>
Date:	Fri, 25 Apr 2014 07:21:33 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Nicolas Del Piano <ndel314@...il.com>
Cc:	devel@...verdev.osuosl.org, david.daney@...ium.com,
	raluca.oncioiu91@...il.com, linux-kernel@...r.kernel.org,
	aaro.koskinen@....fi
Subject: Re: [PATCH] Staging: octeon-usb: fixed a macro coding style issue

On Fri, Apr 25, 2014 at 10:48:22AM -0300, Nicolas Del Piano wrote:
> Fixed a coding style error, macros with complex values should be enclosed in parentheses.
> 
> Signed-off-by: Nicolas Del Piano <ndel314@...il.com>
> ---
>  drivers/staging/octeon-usb/octeon-hcd.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/octeon-usb/octeon-hcd.c b/drivers/staging/octeon-usb/octeon-hcd.c
> index 8b8ce72..ef3a8ce 100644
> --- a/drivers/staging/octeon-usb/octeon-hcd.c
> +++ b/drivers/staging/octeon-usb/octeon-hcd.c
> @@ -246,7 +246,7 @@ enum cvmx_usb_pipe_flags {
>  };
> 
>  /* Normal prefetch that use the pref instruction. */
> -#define CVMX_PREFETCH(address, offset) asm volatile ("pref %[type], %[off](%[rbase])" : : [rbase] "d" (address), [off] "I" (offset), [type] "n" (0))
> +#define CVMX_PREFETCH(address, offset) (asm volatile ("pref %[type], %[off](%[rbase])" : : [rbase] "d" (address), [off] "I" (offset), [type] "n" (0)))
> 
>  /* Maximum number of times to retry failed transactions */
>  #define MAX_RETRIES		3

Will that actually compile?

Why the heck are we using asm in a define in the first place?  Shouldn't
this be an inline function or something?

thanks,

greg k-h
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