| Message ID | 20240906174941.1147197-2-costa.shul@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | powerpc/xive: Use cpumask_intersects() | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/github-powerpc_ppctests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_selftests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_sparse | success | Successfully ran 4 jobs. |
| snowpatch_ozlabs/github-powerpc_clang | success | Successfully ran 5 jobs. |
| snowpatch_ozlabs/github-powerpc_kernel_qemu | success | Successfully ran 21 jobs. |
On Sat, Sep 7, 2024 at 1:50 AM Costa Shulyupin <costa.shul@redhat.com> wrote: > > Replace `cpumask_any_and(a, b) >= nr_cpu_ids` > with the more readable `!cpumask_intersects(a, b)`. > > Signed-off-by: Costa Shulyupin <costa.shul@redhat.com> > --- > arch/powerpc/sysdev/xive/common.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c > index fa01818c1972c..a6c388bdf5d08 100644 > --- a/arch/powerpc/sysdev/xive/common.c > +++ b/arch/powerpc/sysdev/xive/common.c > @@ -726,7 +726,7 @@ static int xive_irq_set_affinity(struct irq_data *d, > pr_debug("%s: irq %d/0x%x\n", __func__, d->irq, hw_irq); > > /* Is this valid ? */ > - if (cpumask_any_and(cpumask, cpu_online_mask) >= nr_cpu_ids) > + if (!cpumask_intersects(cpumask, cpu_online_mask)) > return -EINVAL; Reviewed-by: Ming Lei <ming.lei@redhat.com>
Costa Shulyupin <costa.shul@redhat.com> writes: > Replace `cpumask_any_and(a, b) >= nr_cpu_ids` > with the more readable `!cpumask_intersects(a, b)`. I agree it's more readable. It would be nice if the change log told me that both functions have similar performance behaviour. I'm not saying this is a super hot path, but CPU masks can get pretty big, and some cpumask routines compute the full mask while others short-circuit. cheers > diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c > index fa01818c1972c..a6c388bdf5d08 100644 > --- a/arch/powerpc/sysdev/xive/common.c > +++ b/arch/powerpc/sysdev/xive/common.c > @@ -726,7 +726,7 @@ static int xive_irq_set_affinity(struct irq_data *d, > pr_debug("%s: irq %d/0x%x\n", __func__, d->irq, hw_irq); > > /* Is this valid ? */ > - if (cpumask_any_and(cpumask, cpu_online_mask) >= nr_cpu_ids) > + if (!cpumask_intersects(cpumask, cpu_online_mask)) > return -EINVAL; > > /* > -- > 2.45.0
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index fa01818c1972c..a6c388bdf5d08 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -726,7 +726,7 @@ static int xive_irq_set_affinity(struct irq_data *d, pr_debug("%s: irq %d/0x%x\n", __func__, d->irq, hw_irq); /* Is this valid ? */ - if (cpumask_any_and(cpumask, cpu_online_mask) >= nr_cpu_ids) + if (!cpumask_intersects(cpumask, cpu_online_mask)) return -EINVAL; /*
Replace `cpumask_any_and(a, b) >= nr_cpu_ids` with the more readable `!cpumask_intersects(a, b)`. Signed-off-by: Costa Shulyupin <costa.shul@redhat.com> --- arch/powerpc/sysdev/xive/common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)