On Fri, Jun 26, 2015 at 11:04:49PM -0700, Joe Perches wrote:
> On Sat, 2015-06-27 at 06:36 +0100, Vasiliy Korchagin wrote:
> > This patch fixes the checkpatch.pl error:
> >
> > ERROR: Macros with complex values should be enclosed in parentheses
> > +#define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
> >
> > by expanding it as this macro is used only once.
> []
> > Notes:
> > Here is another version with macro expansion. Inline function expansion doesn't
> > seem like a good idea to me as it would make things overcomplicated.
>
> It looks like it'd be simpler to use vsprintf extension %pU
> ---
> drivers/staging/lustre/lustre/obdclass/uuid.c | 34 +--------------------------
> 1 file changed, 1 insertion(+), 33 deletions(-)
>
> diff --git a/drivers/staging/lustre/lustre/obdclass/uuid.c b/drivers/staging/lustre/lustre/obdclass/uuid.c
> index ff0a01b..b0b0157 100644
> --- a/drivers/staging/lustre/lustre/obdclass/uuid.c
> +++ b/drivers/staging/lustre/lustre/obdclass/uuid.c
> @@ -43,40 +43,8 @@
> #include "../include/obd_support.h"
> #include "../include/obd_class.h"
>
> -
> -static inline __u32 consume(int nob, __u8 **ptr)
> -{
> - __u32 value;
> -
> - LASSERT(nob <= sizeof(value));
> -
> - for (value = 0; nob > 0; --nob)
> - value = (value << 8) | *((*ptr)++);
> - return value;
> -}
> -
> -#define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
> -
> -static void uuid_unpack(class_uuid_t in, __u16 *uu, int nr)
> -{
> - __u8 *ptr = in;
> -
> - LASSERT(nr * sizeof(*uu) == sizeof(class_uuid_t));
> -
> - while (nr-- > 0)
> - CONSUME(uu[nr], &ptr);
> -}
> -
> void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
> {
> - /* uu as an array of __u16's */
> - __u16 uuid[sizeof(class_uuid_t) / sizeof(__u16)];
> -
> - CLASSERT(ARRAY_SIZE(uuid) == 8);
> -
> - uuid_unpack(uu, uuid, ARRAY_SIZE(uuid));
> - sprintf(out->uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
> - uuid[0], uuid[1], uuid[2], uuid[3],
> - uuid[4], uuid[5], uuid[6], uuid[7]);
> + sprintf(out->uuid, "%pU", uu);
> }
> EXPORT_SYMBOL(class_uuid_unparse);
I agree, much better, can you resend this in a form I can apply?
thanks,
greg k-h
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