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RDMA/hfi: Replace cpumask_weight with cpumask_empty where appropriate

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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.

Link: https://lore.kernel.org/r/20220210224933.379149-20-yury.norov@gmail.com
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Yury Norov 2022-02-10 14:49:03 -08:00 committed by Jason Gunthorpe
parent 2f1b2820b5
commit 3c8bc3954d
1 changed files with 2 additions and 2 deletions
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4
drivers/infiniband/hw/hfi1/affinity.c
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@ -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);
}