diff options
| author |   Yang Shi <yang.shi@linux.alibaba.com> | 2019-03-05 15:48:02 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-05 21:07:19 -0800 |
| commit | 59118c42a60b997d277ad04d2309a6ec30682e5e (patch) | |
| tree | 0fb0ac1dfa73f1bcc6e75260b26cf6a54dc0c755 /include/linux/swap.h | |
| parent | selftests/memfd: add tests for F_SEAL_FUTURE_WRITE seal (diff) | |
| download | wireguard-linux-59118c42a60b997d277ad04d2309a6ec30682e5e.tar.xz wireguard-linux-59118c42a60b997d277ad04d2309a6ec30682e5e.zip | |
mm: swap: use mem_cgroup_is_root() instead of deferencing css->parent
mem_cgroup_is_root() is the preferred API to check if memcg is root or
not. Use it instead of deferencing css->parent.
Link: http://lkml.kernel.org/r/1547232913-118148-1-git-send-email-yang.shi@linux.alibaba.com
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Tim Chen <tim.c.chen@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/swap.h')
| -rw-r--r-- | include/linux/swap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index 622025ac1461..649529be91f2 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -625,7 +625,7 @@ 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; |