Re: [PATCH] virtio-mem: Work around format specifier mismatch for RISC-V

[Bruce Rogers <brogers@suse.com>]

On Thu, 2020-07-30 at 10:12 +0200, David Hildenbrand wrote:
> On 30.07.20 09:58, Stefano Garzarella wrote:
> > On Thu, Jul 30, 2020 at 09:51:19AM +0200, David Hildenbrand wrote:
> > > On 30.07.20 09:49, Stefano Garzarella wrote:
> > > > On Wed, Jul 29, 2020 at 06:54:38PM -0600, Bruce Rogers wrote:
> > > > > This likely affects other, less popular host architectures as
> > > > > well.
> > > > > Less common host architectures under linux get
> > > > > QEMU_VMALLOC_ALIGN (from
> > > > > which VIRTIO_MEM_MIN_BLOCK_SIZE is derived) define to a
> > > > > variable of
> > > > > type uintptr, which isn't compatible with the format
> > > > > specifier used to
> > > > > print a user message. Since this particular usage of the
> > > > > underlying data
> > > > > seems unique, the simple fix is to just cast it to the
> > > > > corresponding
> > > > > format specifier.
> > > > > 
> > > > > Signed-off-by: Bruce Rogers <brogers@suse.com>
> > > > > ---
> > > > >  hw/virtio/virtio-mem.c | 2 +-
> > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > > 
> > > > > diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c
> > > > > index c12e9f79b0..fd01ffd83e 100644
> > > > > --- a/hw/virtio/virtio-mem.c
> > > > > +++ b/hw/virtio/virtio-mem.c
> > > > > @@ -754,7 +754,7 @@ static void
> > > > > virtio_mem_set_block_size(Object *obj, Visitor *v, const char
> > > > > *name,
> > > > >  
> > > > >      if (value < VIRTIO_MEM_MIN_BLOCK_SIZE) {
> > > > >          error_setg(errp, "'%s' property has to be at least
> > > > > 0x%" PRIx32, name,
> > > > > -                   VIRTIO_MEM_MIN_BLOCK_SIZE);
> > > > > +                   (unsigned int)VIRTIO_MEM_MIN_BLOCK_SIZE);
> > > > 
> > > > Since we use PRIx32, could be better to cast
> > > > VIRTIO_MEM_MIN_BLOCK_SIZE
> > > > to uint32_t?
> > > 
> > > Yeah, I guess something like
> > > 
> > > -#define VIRTIO_MEM_MIN_BLOCK_SIZE QEMU_VMALLOC_ALIGN
> > > +#define VIRTIO_MEM_MIN_BLOCK_SIZE ((uint32_t)QEMU_VMALLOC_ALIGN)
> > > 
> > > would be cleaner
> > 
> > Yeah, it is cleaner.
> 
> Bruce, can you respin if you agree? Thanks!
> 
Agreed.

- Bruce