Commit 15b05363 authored by Yury Norov [NVIDIA]'s avatar Yury Norov [NVIDIA] Committed by Leon Romanovsky
Browse files

RDMA: hfi1: simplify find_hw_thread_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.

Signed-off-by: default avatarYury Norov [NVIDIA] <yury.norov@gmail.com>
Link: https://patch.msgid.link/20250604193947.11834-4-yury.norov@gmail.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent 59f7d213

drivers/infiniband/hw/hfi1/affinity.c

+4 −12
Original line number Diff line number Diff line
@@ -963,7 +963,7 @@ void hfi1_put_irq_affinity(struct hfi1_devdata *dd, 
static void find_hw_thread_mask(uint hw_thread_no, cpumask_var_t hw_thread_mask,

				struct hfi1_affinity_node_list *affinity)

{

	int possible, curr_cpu, i;

	int curr_cpu;

	uint num_cores_per_socket;



	cpumask_copy(hw_thread_mask, &affinity->proc.mask);
@@ -976,17 +976,9 @@ static void find_hw_thread_mask(uint hw_thread_no, cpumask_var_t hw_thread_mask, 
						node_affinity.num_online_nodes;



	/* Removing other siblings not needed for now */

	possible = cpumask_weight(hw_thread_mask);

	curr_cpu = cpumask_first(hw_thread_mask);

	for (i = 0;

	     i < num_cores_per_socket * node_affinity.num_online_nodes;

	     i++)

		curr_cpu = cpumask_next(curr_cpu, hw_thread_mask);



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

		cpumask_clear_cpu(curr_cpu, hw_thread_mask);

		curr_cpu = cpumask_next(curr_cpu, hw_thread_mask);

	}

	curr_cpu = cpumask_cpumask_nth(num_cores_per_socket *

			node_affinity.num_online_nodes, hw_thread_mask) + 1;

	cpumask_clear_cpus(hw_thread_mask, curr_cpu, nr_cpu_ids - curr_cpu);



	/* Identifying correct HW threads within physical cores */

	cpumask_shift_left(hw_thread_mask, hw_thread_mask,