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authorWu Fengguang <fengguang.wu@intel.com>2009-12-16 06:19:59 -0500
committerAndi Kleen <ak@linux.intel.com>2009-12-16 06:19:59 -0500
commitd324236b3333e87c8825b35f2104184734020d35 (patch)
treee8ad6b50e50f975b692cc6a15d5812a51d0047ad /include/linux/memcontrol.h
parente42d9d5d47961fb5db0be65b56dd52fe7b2421f1 (diff)
memcg: add accessor to mem_cgroup.css
So that an outside user can free the reference count grabbed by try_get_mem_cgroup_from_page(). CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> CC: Hugh Dickins <hugh.dickins@tiscali.co.uk> CC: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> CC: Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'include/linux/memcontrol.h')
-rw-r--r--include/linux/memcontrol.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index fc9bae82ac42..2c30a1116d84 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -81,6 +81,8 @@ int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
81 return cgroup == mem; 81 return cgroup == mem;
82} 82}
83 83
84extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
85
84extern int 86extern int
85mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr); 87mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
86extern void mem_cgroup_end_migration(struct mem_cgroup *mem, 88extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
@@ -206,6 +208,11 @@ static inline int task_in_mem_cgroup(struct task_struct *task,
206 return 1; 208 return 1;
207} 209}
208 210
211static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
212{
213 return NULL;
214}
215
209static inline int 216static inline int
210mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr) 217mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
211{ 218{