Re: [PATCH v3] include/linux/skbuff.h: using '(__u16) ~0U' instead of '~0U'

Chen Gang
2013-06-05T11:16:55Z

On 06/05/2013 04:36 PM, David Miller wrote:
> From: Chen Gang <gang.chen@asianux.com>
> Date: Wed, 05 Jun 2013 08:54:22 +0800
>
>> >
>> > Both 'transport_header' and 'mac_header' are __u16, which are
>> > never equal to '~0U'.
>> >
>> > So need use '(__u16) ~0U' instead of '~0U'.
>> >
>> > The related warning (with EXTRA_CFLAGS=-W ARCH=m68k for allmodconfig)
>> > include/linux/skbuff.h:1587:2: warning: comparison is always true due to limited range of data type [-Wtype-limits]
>> > ...
>> >
>> > Use meaningful macro instead of hard code number, and better to
>> > initialize 'skb->transport_header' in __alloc_skb_head(), too.
>> >
>> >
>> >
>> > Signed-off-by: Chen Gang <gang.chen@asianux.com>
> Your patch doesn't apply to the tree because this has been fixed already
> for several days by using "typeof(x) ~0U"
>
>

OK, thanks.

--
Chen Gang

Asianux Corporation