Allows group_cpus_evenly() to be called in case of !CONFIG_SMP by simply
assigning all CPUs into the 1st group.
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
lib/Makefile | 2 +-
lib/group_cpus.c | 14 ++++++++++++++
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/lib/Makefile b/lib/Makefile
index ff1cbe4958a1..3dbdc7f01215 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -338,7 +338,7 @@ obj-$(CONFIG_SBITMAP) += sbitmap.o
obj-$(CONFIG_PARMAN) += parman.o
-obj-$(CONFIG_SMP) += group_cpus.o
+obj-y += group_cpus.o
# GCC library routines
obj-$(CONFIG_GENERIC_LIB_ASHLDI3) += ashldi3.o
diff --git a/lib/group_cpus.c b/lib/group_cpus.c
index f7165b38c9d0..b34f7d309f9c 100644
--- a/lib/group_cpus.c
+++ b/lib/group_cpus.c
@@ -327,6 +327,7 @@ 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
@@ -411,4 +412,17 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps)
}
return masks;
}
+#else
+struct cpumask *group_cpus_evenly(unsigned int numgrps)
+{
+ struct cpumask *masks = kcalloc(numgrps, sizeof(*masks), GFP_KERNEL);
+
+ if (!masks)
+ return NULL;
+
+ /* assign all CPUs(cpu 0) to the 1st group only */
+ cpumask_copy(&masks[0], cpu_possible_mask);
+ return masks;
+}
+#endif
EXPORT_SYMBOL_GPL(group_cpus_evenly);
--
2.31.1
