linux-kernel - Re: [PATCH] staging: most: Adds parentheses around macros with complex values

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Date:   Thu, 23 Mar 2017 09:59:24 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Mark Stenglein <mark@...ngle.in>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: most: Adds parentheses around macros with
 complex values

On Thu, Mar 23, 2017 at 04:38:38AM -0400, Mark Stenglein wrote:
> Fixes three instances of the following checklist error:
>     - ERROR: Macros with complex values should be enclosed
>       in parentheses
> 
> Simply adds parentheses around the macros to fix the problem.
> 
> Signed-off-by: Mark Stenglein <mark@...ngle.in>
> ---
>  drivers/staging/most/mostcore/core.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/staging/most/mostcore/core.c b/drivers/staging/most/mostcore/core.c
> index 191404bc5906..13e65f149d68 100644
> --- a/drivers/staging/most/mostcore/core.c
> +++ b/drivers/staging/most/mostcore/core.c
> @@ -341,8 +341,8 @@ static ssize_t show_channel_starving(struct most_c_obj *c,
>  	return snprintf(buf, PAGE_SIZE, "%d\n", c->is_starving);
>  }
>  
> -#define create_show_channel_attribute(val) \
> -	static MOST_CHNL_ATTR(val, 0444, show_##val, NULL)
> +#define(create_show_channel_attribute(val)          \
> +	static MOST_CHNL_ATTR(val, 0444, show_##val, NULL))

I don't think this does what you think it does.  Did you test build
this???

Please learn C before working on kernel code, the kernel is not a place
to learn it.

thanks,

greg k-h