| From | Yury Norov <> | Subject | [PATCH 19/49] RDMA/hfi: replace cpumask_weight with cpumask_empty where appropriate | Date | Thu, 10 Feb 2022 14:49:03 -0800 |
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drivers/infiniband/hw/hfi1/affinity.c code calls cpumask_weight() to check if any bit of a given cpumask is set. We can do it more efficiently with cpumask_empty() because cpumask_empty() stops traversing the cpumask as soon as it finds first set bit, while cpumask_weight() counts all bits unconditionally.
Signed-off-by: Yury Norov <yury.norov@gmail.com> Reviewed-by: Leon Romanovsky <leonro@nvidia.com> --- drivers/infiniband/hw/hfi1/affinity.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/hw/hfi1/affinity.c b/drivers/infiniband/hw/hfi1/affinity.c index 706b3b659713..877f8e84a672 100644 --- a/drivers/infiniband/hw/hfi1/affinity.c +++ b/drivers/infiniband/hw/hfi1/affinity.c @@ -666,7 +666,7 @@ int hfi1_dev_affinity_init(struct hfi1_devdata *dd) * engines, use the same CPU cores as general/control * context. */ - if (cpumask_weight(&entry->def_intr.mask) == 0) + if (cpumask_empty(&entry->def_intr.mask)) cpumask_copy(&entry->def_intr.mask, &entry->general_intr_mask); } @@ -686,7 +686,7 @@ int hfi1_dev_affinity_init(struct hfi1_devdata *dd) * vectors, use the same CPU core as the general/control * context. */ - if (cpumask_weight(&entry->comp_vect_mask) == 0) + if (cpumask_empty(&entry->comp_vect_mask)) cpumask_copy(&entry->comp_vect_mask, &entry->general_intr_mask); } -- 2.32.0
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