[PATCH V4 1/7] mm: memcontrol: add helper of memcg_get_e_css
From: Ming Lei <hidden>
Date: 2021-08-06 08:03:50
Also in:
lkml
Subsystem:
control group - memory resource controller (memcg), the rest · Maintainers:
Johannes Weiner, Michal Hocko, Roman Gushchin, Shakeel Butt, Linus Torvalds
And helper of memcg_get_e_css() so that the consumer needn't to call cgroup_get_e_css(cgroup, &memory_cgrp_subsys) directly, since &memory_cgrp_subsys has to be used in case that MEMCG is enabled. Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ming Lei <redacted> --- include/linux/memcontrol.h | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index bfe5c486f4ad..741852addbd7 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h@@ -1101,6 +1101,11 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, gfp_t gfp_mask, unsigned long *total_scanned); +static inline +struct cgroup_subsys_state *memcg_get_e_css(struct cgroup_subsys_state *css) +{ + return cgroup_get_e_css(css->cgroup, &memory_cgrp_subsys); +} #else /* CONFIG_MEMCG */ #define MEM_CGROUP_ID_SHIFT 0
@@ -1456,6 +1461,11 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, { return 0; } +static inline +struct cgroup_subsys_state *memcg_get_e_css(struct cgroup_subsys_state *css) +{ + return NULL; +} #endif /* CONFIG_MEMCG */ static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx)
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2.31.1