From: "Yury Norov [NVIDIA]" <yury.norov@gmail.com>
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: Yury Norov [NVIDIA] <yury.norov@gmail.com>
---
drivers/infiniband/hw/hfi1/affinity.c | 16 ++++------------
1 file changed, 4 insertions(+), 12 deletions(-)
diff --git a/drivers/infiniband/hw/hfi1/affinity.c b/drivers/infiniband/hw/hfi1/affinity.c
index f2c530ab85a5..9ea80b777061 100644
--- a/drivers/infiniband/hw/hfi1/affinity.c
+++ b/drivers/infiniband/hw/hfi1/affinity.c
@@ -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,
--
2.43.0