Re: [Qemu-devel] [QEMU PATCH v3 6/9] vmstate: Add support for kernel integer types

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Liran Alon (liran.alon@oracle.com) wrote:
> 
> 
> > On 18 Jun 2019, at 11:55, Dr. David Alan Gilbert <dgilbert@redhat.com> wrote:
> > 
> > * Liran Alon (liran.alon@oracle.com) wrote:
> >> Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
> >> Reviewed-by: Maran Wilson <maran.wilson@oracle.com>
> >> Signed-off-by: Liran Alon <liran.alon@oracle.com>
> >> ---
> >> include/migration/vmstate.h | 18 ++++++++++++++++++
> >> 1 file changed, 18 insertions(+)
> >> 
> >> diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
> >> index 9224370ed59a..a85424fb0483 100644
> >> --- a/include/migration/vmstate.h
> >> +++ b/include/migration/vmstate.h
> >> @@ -797,6 +797,15 @@ extern const VMStateInfo vmstate_info_qtailq;
> >> #define VMSTATE_UINT64_V(_f, _s, _v)                                  \
> >>     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint64, uint64_t)
> > 
> > A comment here stating they're for Linux kernel types would be nice.
> 
> I didn’t want to state this because in theory these types can be used not in kernel context…
> I thought commit message is sufficient. I think comments in code should be made to clarify
> things. But to justify existence I think commit message should be used.
> But if you insist, I have no strong objection of adding such comment.

It's only a 'would be nice' - it's just I don't want people trying to
use them for other places (I'm not sure what happens if you pass a
uint8_t to VMSTATE_U8 ???

> > 
> >> +#define VMSTATE_U8_V(_f, _s, _v)                                   \
> >> +    VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint8, __u8)
> >> +#define VMSTATE_U16_V(_f, _s, _v)                                  \
> >> +    VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint16, __u16)
> >> +#define VMSTATE_U32_V(_f, _s, _v)                                  \
> >> +    VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint32, __u32)
> >> +#define VMSTATE_U64_V(_f, _s, _v)                                  \
> >> +    VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint64, __u64)
> >> +
> > 
> > Have you checked that builds OK on a non-Linux system?
> 
> Hmm that’s a good point. No. :P

Worth a check if you can find one lying around :-)

Dave

> -Liran
> 
> > 
> > Dave
> > 
> >> #define VMSTATE_BOOL(_f, _s)                                          \
> >>     VMSTATE_BOOL_V(_f, _s, 0)
> >> 
> >> @@ -818,6 +827,15 @@ extern const VMStateInfo vmstate_info_qtailq;
> >> #define VMSTATE_UINT64(_f, _s)                                        \
> >>     VMSTATE_UINT64_V(_f, _s, 0)
> >> 
> >> +#define VMSTATE_U8(_f, _s)                                         \
> >> +    VMSTATE_U8_V(_f, _s, 0)
> >> +#define VMSTATE_U16(_f, _s)                                        \
> >> +    VMSTATE_U16_V(_f, _s, 0)
> >> +#define VMSTATE_U32(_f, _s)                                        \
> >> +    VMSTATE_U32_V(_f, _s, 0)
> >> +#define VMSTATE_U64(_f, _s)                                        \
> >> +    VMSTATE_U64_V(_f, _s, 0)
> >> +
> >> #define VMSTATE_UINT8_EQUAL(_f, _s, _err_hint)                        \
> >>     VMSTATE_SINGLE_FULL(_f, _s, 0, 0,                                 \
> >>                         vmstate_info_uint8_equal, uint8_t, _err_hint)
> >> -- 
> >> 2.20.1
> >> 
> > --
> > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK