Hi Am 04.02.21 um 19:17 schrieb Colin King:
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Don't populate the const array m_div_val on the stack but instead make
it static. Makes the object code smaller by 29 bytes:
Before:
text data bss dec hex filename
34736 4552 0 39288 9978 drivers/gpu/drm/mgag200/mgag200_mode.o
After:
text data bss dec hex filename
34625 4616 0 39241 9949 drivers/gpu/drm/mgag200/mgag200_mode.o
(gcc version 10.2.0)
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Very nice. I'm actually surprised that the compiler doesn't figure this out automatically. When I once tested this (in userspace) it did so. Maybe the kernel is different?
For style reasons, I would have moved the static definition to the top of the function; before the variable declarations. In any case:
Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx> If I don't here from you, I'll merge the patch soonish. Best regards Thomas
--- drivers/gpu/drm/mgag200/mgag200_mode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c index 1dfc42170059..27f33af09798 100644 --- a/drivers/gpu/drm/mgag200/mgag200_mode.c +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c @@ -712,7 +712,7 @@ static int mga_g200er_set_plls(struct mga_device *mdev, long clock) unsigned int p, m, n; unsigned int computed, vco; int tmp; - const unsigned int m_div_val[] = { 1, 2, 4, 8 }; + static const unsigned int m_div_val[] = { 1, 2, 4, 8 };m = n = p = 0;vcomax = 1488000;
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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