[PATCH V2 6/7] lib/group_cpus: allow to group cpus in case of !CONFIG_SMP
From: Ming Lei <hidden>
Date: 2021-08-18 09:34:47
Also in:
lkml
Subsystem:
irq subsystem, library code, the rest · Maintainers:
Thomas Gleixner, Andrew Morton, Linus Torvalds
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 <redacted> --- lib/group_cpus.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
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