So that one can check its cgroup id and free the reference count grabbed by try_get_mem_cgroup_from_page(). Signed-off-by: Wu Fengguang --- include/linux/memcontrol.h | 7 +++++++ mm/memcontrol.c | 6 ++++++ 2 files changed, 13 insertions(+) --- linux-mm.orig/include/linux/memcontrol.h 2009-08-31 15:25:48.000000000 +0800 +++ linux-mm/include/linux/memcontrol.h 2009-08-31 15:27:00.000000000 +0800 @@ -81,6 +81,8 @@ int mm_match_cgroup(const struct mm_stru return cgroup == mem; } +extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem); + extern int mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr); extern void mem_cgroup_end_migration(struct mem_cgroup *mem, @@ -206,6 +208,11 @@ static inline int task_in_mem_cgroup(str return 1; } +static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) +{ + return NULL; +} + static inline int mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr) { --- linux-mm.orig/mm/memcontrol.c 2009-08-31 15:25:48.000000000 +0800 +++ linux-mm/mm/memcontrol.c 2009-08-31 15:25:52.000000000 +0800 @@ -282,6 +282,12 @@ mem_cgroup_zoneinfo(struct mem_cgroup *m return &mem->info.nodeinfo[nid]->zoneinfo[zid]; } +struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) +{ + return &mem->css; +} +EXPORT_SYMBOL(mem_cgroup_css); + static struct mem_cgroup_per_zone * page_cgroup_zoneinfo(struct page_cgroup *pc) { -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/