[RFC PATCH 6/7] lib/group_cpus: allow to group cpus in case of !CONFIG_SMP
STALE1896d
From: Ming Lei <hidden>
Date: 2021-07-19 09:58:30
Also in:
lkml
Subsystem:
irq subsystem, the rest · Maintainers:
Thomas Gleixner, Linus Torvalds
Revision rfc of 4 in this series.
Revisions (4)
- rfc current
- v1 [diff vs current]
- v2 [diff vs current]
- v3 [diff vs current]
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> --- include/linux/group_cpus.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/include/linux/group_cpus.h b/include/linux/group_cpus.h
index e42807ec61f6..79e5cc15bd96 100644
--- a/include/linux/group_cpus.h
+++ b/include/linux/group_cpus.h@@ -9,6 +9,20 @@ #include <linux/kernel.h> #include <linux/cpu.h> +#ifdef CONFIG_SMP struct cpumask *group_cpus_evenly(unsigned int numgrps); +#else +static inline 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 #endif
--
2.31.1