Re: [PATCH 4/6] tools/gup_benchmark: Allow user specified file

[Keith Busch <keith.busch@intel.com>]

On Wed, Oct 10, 2018 at 03:31:01PM -0700, Andrew Morton wrote:
> On Wed, 10 Oct 2018 13:56:03 -0600 Keith Busch <keith.busch@intel.com> wrote:
> > +	filed = open(file, O_RDWR|O_CREAT);
> > +	if (filed < 0)
> > +		perror("open"), exit(filed);
> 
> Ick.  Like this, please:

Yeah, I agree. I just copied the style this file had been using in other
error cases, but I still find it less readable than your recommendation. 
 
> --- a/tools/testing/selftests/vm/gup_benchmark.c~tools-gup_benchmark-allow-user-specified-file-fix
> +++ a/tools/testing/selftests/vm/gup_benchmark.c
> @@ -71,8 +71,10 @@ int main(int argc, char **argv)
>  	}
>  
>  	filed = open(file, O_RDWR|O_CREAT);
> -	if (filed < 0)
> -		perror("open"), exit(filed);
> +	if (filed < 0) {
> +		perror("open");
> +		exit(filed);
> +	}
>  
>  	gup.nr_pages_per_call = nr_pages;
>  	gup.flags = write;
>