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[5/9] lib/cpumask: reorganize cpumask_local_spread() logic

Message ID 20230121042436.2661843-6-yury.norov@gmail.com (mailing list archive)
State Accepted
Commit b1beed72b8b75d365fdbc925da856c212195051b
Delegated to: Netdev Maintainers
Headers show
Series sched: cpumask: improve on cpumask_local_spread() locality | expand

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Context Check Description
netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 4 this patch: 4
netdev/cc_maintainers success CCed 3 of 3 maintainers
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 4 this patch: 4
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 22 lines checked
netdev/kdoc success Errors and warnings before: 3 this patch: 3
netdev/source_inline success Was 0 now: 0

Commit Message

Yury Norov Jan. 21, 2023, 4:24 a.m. UTC 
Now after moving all NUMA logic into sched_numa_find_nth_cpu(),
else-branch of cpumask_local_spread() is just a function call, and
we can simplify logic by using ternary operator.

While here, replace BUG() with WARN_ON().

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Acked-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Peter Lafreniere <peter@n8pjl.ca>
---
 lib/cpumask.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/lib/cpumask.c b/lib/cpumask.c
index 255974cd6734..10aa15715c0d 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -127,16 +127,12 @@  unsigned int cpumask_local_spread(unsigned int i, int node)
 	/* Wrap: we always want a cpu. */
 	i %= num_online_cpus();
 
-	if (node == NUMA_NO_NODE) {
-		cpu = cpumask_nth(i, cpu_online_mask);
-		if (cpu < nr_cpu_ids)
-			return cpu;
-	} else {
-		cpu = sched_numa_find_nth_cpu(cpu_online_mask, i, node);
-		if (cpu < nr_cpu_ids)
-			return cpu;
-	}
-	BUG();
+	cpu = (node == NUMA_NO_NODE) ?
+		cpumask_nth(i, cpu_online_mask) :
+		sched_numa_find_nth_cpu(cpu_online_mask, i, node);
+
+	WARN_ON(cpu >= nr_cpu_ids);
+	return cpu;
 }
 EXPORT_SYMBOL(cpumask_local_spread);