Re: [PATCH v2 2/4] backlight: pwm_bl: eliminate a 64/32 division

2019-10-14 Thread Lee Jones
On Tue, 08 Oct 2019, Rasmus Villemoes wrote: > lightness*1000 is nowhere near overflowing 32 bits, so we can just use > an ordinary 32/32 division, which is much cheaper than the 64/32 done > via do_div(). > > Reviewed-by: Daniel Thompson > Signed-off-by: Rasmus Villemoes > --- >

[PATCH v2 2/4] backlight: pwm_bl: eliminate a 64/32 division

2019-10-08 Thread Rasmus Villemoes
lightness*1000 is nowhere near overflowing 32 bits, so we can just use an ordinary 32/32 division, which is much cheaper than the 64/32 done via do_div(). Reviewed-by: Daniel Thompson Signed-off-by: Rasmus Villemoes --- drivers/video/backlight/pwm_bl.c | 2 +- 1 file changed, 1 insertion(+), 1