On Tue, Apr 05, 2016 at 01:57:36PM +0100, Chris Wilson wrote:
> I have instances where I want to use drm_malloc_ab() but with a custom
> gfp mask. And with those, where I want a temporary allocation, I want to
> try a high-order kmalloc() before using a vmalloc().
>
> So refactor my usage into drm_malloc_gfp().
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Acked-by: Dave Airlie <airlied@xxxxxxxxxx>
> +static __inline__ void *drm_malloc_gfp(size_t nmemb, size_t size, gfp_t gfp)
> +{
> + if (size != 0 && nmemb > SIZE_MAX / size)
> + return NULL;
I know Dave G. has some fancy code to detect when the size parameter is
not constant, but one thing I noticed was that gcc would uninline this
function and we would lose the constant folding. Is there anything we
can do to convince gcc to avoid a div here (other than pure macro)?
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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