Commit 59ae2e3c authored by Yury Norov [NVIDIA]'s avatar Yury Norov [NVIDIA] Committed by Leon Romanovsky
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RDMA: hfi1: simplify init_real_cpu_mask() 



The function opencodes cpumask_nth() and cpumask_clear_cpus(). The
dedicated helpers are easier to use and  usually much faster than
opencoded for-loops.

While there, drop useless clear of real_cpu_mask.

Signed-off-by: default avatarYury Norov [NVIDIA] <yury.norov@gmail.com>
Link: https://patch.msgid.link/20250604193947.11834-5-yury.norov@gmail.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent 15b05363

drivers/infiniband/hw/hfi1/affinity.c

+5 −14
Original line number Diff line number Diff line
@@ -92,9 +92,7 @@ static void cpu_mask_set_put(struct cpu_mask_set *set, int cpu) 
/* Initialize non-HT cpu cores mask */

void init_real_cpu_mask(void)

{

	int possible, curr_cpu, i, ht;



	cpumask_clear(&node_affinity.real_cpu_mask);

	int possible, curr_cpu, ht;



	/* Start with cpu online mask as the real cpu mask */

	cpumask_copy(&node_affinity.real_cpu_mask, cpu_online_mask);
@@ -110,17 +108,10 @@ void init_real_cpu_mask(void) 
	 * "real" cores.  Assumes that HT cores are not enumerated in

	 * succession (except in the single core case).

	 */

	curr_cpu = cpumask_first(&node_affinity.real_cpu_mask);

	for (i = 0; i < possible / ht; i++)

		curr_cpu = cpumask_next(curr_cpu, &node_affinity.real_cpu_mask);

	/*

	 * Step 2.  Remove the remaining HT siblings.  Use cpumask_next() to

	 * skip any gaps.

	 */

	for (; i < possible; i++) {

		cpumask_clear_cpu(curr_cpu, &node_affinity.real_cpu_mask);

		curr_cpu = cpumask_next(curr_cpu, &node_affinity.real_cpu_mask);

	}

	curr_cpu = cpumask_nth(possible / ht, &node_affinity.real_cpu_mask) + 1;



	/* Step 2.  Remove the remaining HT siblings. */

	cpumask_clear_cpus(&node_affinity.real_cpu_mask, curr_cpu, nr_cpu_ids - curr_cpu);

}



int node_affinity_init(void)