Quoting Mika Kuoppala (2019-07-10 16:34:23)
> Chris Wilson <ch...@chris-wilson.co.uk> writes:
> 
> > Specify that we do want a 64b value for sizeof(u32) as we want to
> > compute the mask of the upper 62bits.
> >
> > Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
> > Cc: Mika Kuoppala <mika.kuopp...@linux.intel.com>
> > ---
> >  drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c 
> > b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> > index 3abe15a08b6d..275ec1bfc2be 100644
> > --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> > +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> > @@ -1539,7 +1539,7 @@ static int igt_vm_isolation(void *arg)
> >  
> >                       div64_u64_rem(i915_prandom_u64_state(&prng),
> >                                     vm_total, &offset);
> > -                     offset &= -sizeof(u32);
> > +                     offset &= -(u64)sizeof(u32);
> 
> Taking a sizeof of something we know the size of.

u32 is a proxy for dword, and I was just trying to be more expressive
that we want the address aligned to a dword for the MI_STORE_DWORD_IMM
used. alignof_dword maybe?
-Chris
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