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RDMA: hfi1: simplify init_real_cpu_mask()

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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: Yury Norov [NVIDIA] <yury.norov@gmail.com>
Link: https://patch.msgid.link/20250604193947.11834-5-yury.norov@gmail.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Yury Norov [NVIDIA] 2025-06-04 15:39:40 -04:00 committed by Leon Romanovsky
parent 15b0536313
commit 59ae2e3c6a
1 changed files with 5 additions and 14 deletions
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19
drivers/infiniband/hw/hfi1/affinity.c
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@ -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)