random: Use this_cpu_inc_return
__this_cpu_inc can create a single instruction to do the same as __get_cpu_var()++. Cc: Richard Kennedy <richard@rsk.demon.co.uk> Cc: Matt Mackall <mpm@selenic.com> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
parent
ee1be86263
commit
b29c617af3
|
@ -626,7 +626,7 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
|
|||
preempt_disable();
|
||||
/* if over the trickle threshold, use only 1 in 4096 samples */
|
||||
if (input_pool.entropy_count > trickle_thresh &&
|
||||
(__get_cpu_var(trickle_count)++ & 0xfff))
|
||||
((__this_cpu_inc_return(trickle_count) - 1) & 0xfff))
|
||||
goto out;
|
||||
|
||||
sample.jiffies = jiffies;
|
||||
|
|
Loading…
Reference in a new issue