Messages in this thread Patch in this message | | | From | Yang Shi <> | Subject | [PATCH] mm: swap: use mem_cgroup_is_root() instead of deferencing css->parent | Date | Sat, 12 Jan 2019 02:55:13 +0800 |
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mem_cgroup_is_root() is preferred API to check if memcg is root or not. Use it instead of deferencing css->parent.
Cc: Huang Ying <ying.huang@intel.com> Cc: Tim Chen <tim.c.chen@intel.com> Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com> --- include/linux/swap.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/swap.h b/include/linux/swap.h index a8f6d5d..8739063 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -623,7 +623,7 @@ static inline int mem_cgroup_swappiness(struct mem_cgroup *memcg) return vm_swappiness; /* root ? */ - if (mem_cgroup_disabled() || !memcg->css.parent) + if (mem_cgroup_disabled() || mem_cgroup_is_root(memcg)) return vm_swappiness; return memcg->swappiness; -- 1.8.3.1
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