On Fri, Jan 20, 2017 at 08:21:28AM +0100, Markus Armbruster wrote:
> "Michael S. Tsirkin" writes:
>
> > On Thu, Jan 19, 2017 at 02:33:40PM +0100, Markus Armbruster wrote:
> >> Paolo Bonzini writes:
> >>
> >> > On 19/01/2017 09:12, Markus Armbruster wrote:
> >> >> "Michael S. Tsirkin" writes:
>
"Michael S. Tsirkin" writes:
> On Thu, Jan 19, 2017 at 02:33:40PM +0100, Markus Armbruster wrote:
>> Paolo Bonzini writes:
>>
>> > On 19/01/2017 09:12, Markus Armbruster wrote:
>> >> "Michael S. Tsirkin" writes:
>> >>
>> >>> QEMU_BUILD_BUG_ON uses a typedef in order to be safe
>> >>> to use o
On Thu, Jan 19, 2017 at 02:58:48PM -0600, Eric Blake wrote:
> On 01/19/2017 01:25 PM, Michael S. Tsirkin wrote:
>
> > +#define QEMU_BUILD_BUG_ON_ZERO(x) (sizeof(int[(x) ? -1 : 1]) -
> > sizeof(int))
> >>>
> >>> Linux here uses:
> >>>
> >>> #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int
On Thu, Jan 19, 2017 at 02:33:40PM +0100, Markus Armbruster wrote:
> Paolo Bonzini writes:
>
> > On 19/01/2017 09:12, Markus Armbruster wrote:
> >> "Michael S. Tsirkin" writes:
> >>
> >>> QEMU_BUILD_BUG_ON uses a typedef in order to be safe
> >>> to use outside functions, but sometimes it's use
On 01/19/2017 01:25 PM, Michael S. Tsirkin wrote:
> +#define QEMU_BUILD_BUG_ON_ZERO(x) (sizeof(int[(x) ? -1 : 1]) -
> sizeof(int))
>>>
>>> Linux here uses:
>>>
>>> #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
>>>
>>> and the issue is that sizeof(int[(x) ? -1 : 1]) could b
On Thu, Jan 19, 2017 at 02:33:40PM +0100, Markus Armbruster wrote:
> Paolo Bonzini writes:
>
> > On 19/01/2017 09:12, Markus Armbruster wrote:
> >> "Michael S. Tsirkin" writes:
> >>
> >>> QEMU_BUILD_BUG_ON uses a typedef in order to be safe
> >>> to use outside functions, but sometimes it's use
Paolo Bonzini writes:
> On 19/01/2017 09:12, Markus Armbruster wrote:
>> "Michael S. Tsirkin" writes:
>>
>>> QEMU_BUILD_BUG_ON uses a typedef in order to be safe
>>> to use outside functions, but sometimes it's useful
>>> to have a version that can be used within an expression.
>>> Following wh
On 19/01/2017 09:12, Markus Armbruster wrote:
> "Michael S. Tsirkin" writes:
>
>> QEMU_BUILD_BUG_ON uses a typedef in order to be safe
>> to use outside functions, but sometimes it's useful
>> to have a version that can be used within an expression.
>> Following what Linux does, introduce QEMU_
"Michael S. Tsirkin" writes:
> QEMU_BUILD_BUG_ON uses a typedef in order to be safe
> to use outside functions, but sometimes it's useful
> to have a version that can be used within an expression.
> Following what Linux does, introduce QEMU_BUILD_BUG_ON_ZERO
> that return zero after checking cond
QEMU_BUILD_BUG_ON uses a typedef in order to be safe
to use outside functions, but sometimes it's useful
to have a version that can be used within an expression.
Following what Linux does, introduce QEMU_BUILD_BUG_ON_ZERO
that return zero after checking condition at build time.
Signed-off-by: Mich
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