Re: [Xen-devel] bogus wrap check in xen-netback

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 25.04.18 at 11:04, <olaf@xxxxxxxxx> wrote:
> Am Wed, 25 Apr 2018 09:59:23 +0100
> schrieb Wei Liu <wei.liu2@xxxxxxxxxx>:
> 
>> Do you have the full diff of your changes? 
> 
> Not right now. But without 'val', or val being uint, the same error happens 
> in f():
> 
> #include <stdio.h>
> void f(void)
> {
>         unsigned short req_prod = 0, req_cons = 65400;
>         unsigned short val;
>         val = req_prod - req_cons;
>         printf("req_prod - req_cons %u\n", val);
>         printf("req_prod - req_cons %x\n", val);
> }

Well, of course - anything more narrow than int will be promoted to int first.

Jan



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel