From: Kirill Tkhai ktkhai@virtuozzo.com
[ Upstream commit 44bd4a4759d5a714767aa6be7e806ab54b7fa3a8 ]
This is just refactoring to allow the next patches to have memcg pointer in list_lru_from_kmem().
Link: http://lkml.kernel.org/r/153063060664.1818.9541345386733498582.stgit@localho... Signed-off-by: Kirill Tkhai ktkhai@virtuozzo.com Acked-by: Vladimir Davydov vdavydov.dev@gmail.com Tested-by: Shakeel Butt shakeelb@google.com Cc: Al Viro viro@zeniv.linux.org.uk Cc: Andrey Ryabinin aryabinin@virtuozzo.com Cc: Chris Wilson chris@chris-wilson.co.uk Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Guenter Roeck linux@roeck-us.net Cc: "Huang, Ying" ying.huang@intel.com Cc: Johannes Weiner hannes@cmpxchg.org Cc: Josef Bacik jbacik@fb.com Cc: Li RongQing lirongqing@baidu.com Cc: Matthew Wilcox willy@infradead.org Cc: Matthias Kaehlcke mka@chromium.org Cc: Mel Gorman mgorman@techsingularity.net Cc: Michal Hocko mhocko@kernel.org Cc: Minchan Kim minchan@kernel.org Cc: Philippe Ombredanne pombredanne@nexb.com Cc: Roman Gushchin guro@fb.com Cc: Sahitya Tummala stummala@codeaurora.org Cc: Stephen Rothwell sfr@canb.auug.org.au Cc: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp Cc: Thomas Gleixner tglx@linutronix.de Cc: Waiman Long longman@redhat.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- mm/list_lru.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-)
diff --git a/mm/list_lru.c b/mm/list_lru.c index 786176b1a0ee..b685b820a6d9 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -74,18 +74,24 @@ static __always_inline struct mem_cgroup *mem_cgroup_from_kmem(void *ptr) }
static inline struct list_lru_one * -list_lru_from_kmem(struct list_lru_node *nlru, void *ptr) +list_lru_from_kmem(struct list_lru_node *nlru, void *ptr, + struct mem_cgroup **memcg_ptr) { - struct mem_cgroup *memcg; + struct list_lru_one *l = &nlru->lru; + struct mem_cgroup *memcg = NULL;
if (!nlru->memcg_lrus) - return &nlru->lru; + goto out;
memcg = mem_cgroup_from_kmem(ptr); if (!memcg) - return &nlru->lru; + goto out;
- return list_lru_from_memcg_idx(nlru, memcg_cache_id(memcg)); + l = list_lru_from_memcg_idx(nlru, memcg_cache_id(memcg)); +out: + if (memcg_ptr) + *memcg_ptr = memcg; + return l; } #else static inline bool list_lru_memcg_aware(struct list_lru *lru) @@ -100,8 +106,11 @@ list_lru_from_memcg_idx(struct list_lru_node *nlru, int idx) }
static inline struct list_lru_one * -list_lru_from_kmem(struct list_lru_node *nlru, void *ptr) +list_lru_from_kmem(struct list_lru_node *nlru, void *ptr, + struct mem_cgroup **memcg_ptr) { + if (memcg_ptr) + *memcg_ptr = NULL; return &nlru->lru; } #endif /* CONFIG_MEMCG_KMEM */ @@ -114,7 +123,7 @@ bool list_lru_add(struct list_lru *lru, struct list_head *item)
spin_lock(&nlru->lock); if (list_empty(item)) { - l = list_lru_from_kmem(nlru, item); + l = list_lru_from_kmem(nlru, item, NULL); list_add_tail(item, &l->list); l->nr_items++; nlru->nr_items++; @@ -134,7 +143,7 @@ bool list_lru_del(struct list_lru *lru, struct list_head *item)
spin_lock(&nlru->lock); if (!list_empty(item)) { - l = list_lru_from_kmem(nlru, item); + l = list_lru_from_kmem(nlru, item, NULL); list_del_init(item); l->nr_items--; nlru->nr_items--;