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Subject[PATCH 18/54] drivers/infiniband: replace cpumask_weight with cpumask_empty where appropriate
Date
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>
---
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 98c813ba4304..38eee675369a 100644
--- a/drivers/infiniband/hw/hfi1/affinity.c
+++ b/drivers/infiniband/hw/hfi1/affinity.c
@@ -667,7 +667,7 @@ 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);
}
@@ -687,7 +687,7 @@ 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);
}
--
2.30.2
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