Re: [Qemu-devel] [PATCH 18/32] hd-geometry: Switch to uint32_t to match BlockConf

["Andreas Färber" <afaerber@suse.de>]

Am 03.07.2012 21:11, schrieb Blue Swirl:
> On Mon, Jul 2, 2012 at 2:34 PM, Stefan Hajnoczi <stefanha@gmail.com> wrote:
>> On Mon, Jul 2, 2012 at 3:15 PM, Markus Armbruster <armbru@redhat.com> wrote:
>>> Andreas Färber <afaerber@suse.de> writes:
>>>
>>>> Am 02.07.2012 14:55, schrieb Stefan Hajnoczi:
>>>>> On Fri, Jun 29, 2012 at 05:34:40PM +0200, Markus Armbruster wrote:
>>>>>> Best to use the same type, to avoid unwanted truncation or sign
>>>>>> extension.
>>>>>>
>>>>>> BlockConf can't use plain int for cyls, heads and secs, because
>>>>>> integer properties require an exact width.
>>>>>>
>>>>>> Signed-off-by: Markus Armbruster <armbru@redhat.com>
>>>>>> ---
>>>>>>  blockdev.h       |    2 +-
>>>>>>  hw/hd-geometry.c |    4 ++--
>>>>>>  hw/ide/core.c    |    2 +-
>>>>>>  hw/scsi-disk.c   |    2 +-
>>>>>>  hw/virtio-blk.c  |    2 +-
>>>>>>  5 files changed, 6 insertions(+), 6 deletions(-)
>>>>>
>>>>> It would be nice to update the hd_geometry_lchs_guess() trace event that
>>>>> you added to use uint32_t + %u instead of int + %d.
>>>>
>>>> PRIu32?
>>>
>>> uint32_t: Good point, will do.
>>>
>>> Conversion specifier: trace-events routinely prints uint32_t with %d and
>>> %x, never with PRI*32.  I'm happy to change from %d to %u, but reluctant
>>> to add the first use of PRIu32.
>>
>> Either is fine by me although we might as well continue to do %u.
> 
> I'd also vote for %u. PRI*32 do not seem very useful compared to plain
> int versions.

If it's not useful we should use unsigned int.

Mixing both is simply wrong. I'm okay with fixing it consistently in a
follow-up though. The Broken Window theory scores again (lack of const,
non-CamelCase type names, placement of {, wrong semicolons, etc.).

Andreas

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