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authorIngo Molnar <mingo@kernel.org>2023-01-18 14:14:01 +0300
committerIngo Molnar <mingo@kernel.org>2023-01-18 14:16:47 +0300
commit188a569658584e93930ab60334c5a1079c0330d8 (patch)
tree6ce09e489b47df3172ee819c9b80bc11feefc34d /lib/group_cpus.c
parent6a6dcae8f486c3f3298d0767d34505121c7b0b81 (diff)
downloadlinux-188a569658584e93930ab60334c5a1079c0330d8.tar.xz
genirq/affinity: Only build SMP-only helper functions on SMP kernels
allnoconfig grew these new build warnings in lib/group_cpus.c: lib/group_cpus.c:247:12: warning: ‘__group_cpus_evenly’ defined but not used [-Wunused-function] lib/group_cpus.c:75:13: warning: ‘build_node_to_cpumask’ defined but not used [-Wunused-function] lib/group_cpus.c:66:13: warning: ‘free_node_to_cpumask’ defined but not used [-Wunused-function] lib/group_cpus.c:43:23: warning: ‘alloc_node_to_cpumask’ defined but not used [-Wunused-function] Widen the #ifdef CONFIG_SMP block to not expose unused helpers on non-SMP builds. Also annotate the preprocessor branches for better readability. Fixes: f7b3ea8cf72f ("genirq/affinity: Move group_cpus_evenly() into lib/") Cc: Ming Lei <ming.lei@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20221227022905.352674-6-ming.lei@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/group_cpus.c')
-rw-r--r--lib/group_cpus.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/group_cpus.c b/lib/group_cpus.c
index 99f08c6cb9d9..9c837a35fef7 100644
--- a/lib/group_cpus.c
+++ b/lib/group_cpus.c
@@ -9,6 +9,8 @@
#include <linux/sort.h>
#include <linux/group_cpus.h>
+#ifdef CONFIG_SMP
+
static void grp_spread_init_one(struct cpumask *irqmsk, struct cpumask *nmsk,
unsigned int cpus_per_grp)
{
@@ -327,7 +329,6 @@ static int __group_cpus_evenly(unsigned int startgrp, unsigned int numgrps,
return done;
}
-#ifdef CONFIG_SMP
/**
* group_cpus_evenly - Group all CPUs evenly per NUMA/CPU locality
* @numgrps: number of groups
@@ -412,7 +413,7 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps)
}
return masks;
}
-#else
+#else /* CONFIG_SMP */
struct cpumask *group_cpus_evenly(unsigned int numgrps)
{
struct cpumask *masks = kcalloc(numgrps, sizeof(*masks), GFP_KERNEL);
@@ -424,4 +425,4 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps)
cpumask_copy(&masks[0], cpu_possible_mask);
return masks;
}
-#endif
+#endif /* CONFIG_SMP */