memcontrol: move mm_cgroup to header file

[linux-2.6-omap-h63xx.git] / include / linux / memcontrol.h

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 9d0a830423b625f7ab6a8315dedc429621323b32..4f580268b1b7e9e41f9553204b406ed5cc87e132 100644 (file)
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -20,6 +20,9 @@
 #ifndef _LINUX_MEMCONTROL_H
 #define _LINUX_MEMCONTROL_H
 
+#include <linux/rcupdate.h>
+#include <linux/mm.h>
+
 struct mem_cgroup;
 struct page_cgroup;
 struct page;
@@ -32,7 +35,8 @@ extern void mm_free_cgroup(struct mm_struct *mm);
 extern void page_assign_page_cgroup(struct page *page,
                                        struct page_cgroup *pc);
 extern struct page_cgroup *page_get_page_cgroup(struct page *page);
-extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm);
+extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+                               gfp_t gfp_mask);
 extern void mem_cgroup_uncharge(struct page_cgroup *pc);
 extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
@@ -42,8 +46,13 @@ extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
                                        struct mem_cgroup *mem_cont,
                                        int active);
 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
-extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm);
-extern struct mem_cgroup *mm_cgroup(struct mm_struct *mm);
+extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
+                                       gfp_t gfp_mask);
+
+static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
+{
+       return rcu_dereference(mm->mem_cgroup);
+}
 
 static inline void mem_cgroup_uncharge_page(struct page *page)
 {
@@ -70,7 +79,8 @@ static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
        return NULL;
 }
 
-static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm)
+static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
+                                       gfp_t gfp_mask)
 {
        return 0;
 }
@@ -89,12 +99,13 @@ static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
 }
 
 static inline int mem_cgroup_cache_charge(struct page *page,
-                                               struct mm_struct *mm)
+                                               struct mm_struct *mm,
+                                               gfp_t gfp_mask)
 {
        return 0;
 }
 
-static inline struct mem_cgroup *mm_cgroup(struct mm_struct *mm)
+static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
 {
        return NULL;
 }