On Thu, Oct 17, 2019 at 01:28:29PM +0530, Ramalingam C wrote:
> On 2019-10-10 at 17:51:23 +0300, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> >
> > Make the ways/sets arrays static cosnt u8 to shrink things a bit.
> >
> > text data bss dec hex filename
> > - 23935 629 128 24692 6074 i915_drv.o
> > + 23818 629 128 24575 5fff i915_drv.o
> >
> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/i915_drv.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> > index f02a34722217..0b8c13ae4857 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.c
> > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > @@ -1073,8 +1073,8 @@ intel_get_dram_info(struct drm_i915_private *dev_priv)
> >
> > static u32 gen9_edram_size_mb(struct drm_i915_private *dev_priv, u32 cap)
> > {
> > - const unsigned int ways[8] = { 4, 8, 12, 16, 16, 16, 16, 16 };
> > - const unsigned int sets[4] = { 1, 1, 2, 2 };
> > + static const u8 ways[8] = { 4, 8, 12, 16, 16, 16, 16, 16 };
> > + static const u8 sets[4] = { 1, 1, 2, 2 };
> Asking for my understanding. unsigned int -> u8 make sense to shrink the
> size. Could you please add reasoning for adding static? moving it into
> data segment hence reducing the stack?
Possibly. My usual approach is to just make all such things
static const unless there is a real reason not to.
>
> -Ram
> >
> > return EDRAM_NUM_BANKS(cap) *
> > ways[EDRAM_WAYS_IDX(cap)] *
> > --
> > 2.21.0
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel
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