mm: unify remaining mem_cont, mem, etc. variable names to memcg

Signed-off-by: Johannes Weiner <jweiner@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 81aabfbc731e7f7e0852e6245ecccb812d67ac7b..4b70e05566e0e9c07073d760f097e0a46502a18f 100644 (file)
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -54,10 +54,10 @@ extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
                                gfp_t gfp_mask);
 /* for swap handling */
 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
-               struct page *page, gfp_t mask, struct mem_cgroup **ptr);
+               struct page *page, gfp_t mask, struct mem_cgroup **memcgp);
 extern void mem_cgroup_commit_charge_swapin(struct page *page,
-                                       struct mem_cgroup *ptr);
-extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
+                                       struct mem_cgroup *memcg);
+extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg);
 
 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
                                        gfp_t gfp_mask);
@@ -98,7 +98,7 @@ extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
 
 extern int
 mem_cgroup_prepare_migration(struct page *page,
-       struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
+       struct page *newpage, struct mem_cgroup **memcgp, gfp_t gfp_mask);
 extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
        struct page *oldpage, struct page *newpage, bool migration_ok);
 
@@ -181,17 +181,17 @@ static inline int mem_cgroup_cache_charge(struct page *page,
 }
 
 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
-               struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
+               struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp)
 {
        return 0;
 }
 
 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
-                                         struct mem_cgroup *ptr)
+                                         struct mem_cgroup *memcg)
 {
 }
 
-static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
+static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
 {
 }
 
@@ -270,7 +270,7 @@ static inline struct cgroup_subsys_state
 
 static inline int
 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
-       struct mem_cgroup **ptr, gfp_t gfp_mask)
+       struct mem_cgroup **memcgp, gfp_t gfp_mask)
 {
        return 0;
 }

diff --git a/include/linux/oom.h b/include/linux/oom.h
index 6f9d04a8533606afa788c351909c5dba74e54438..552fba9c7d5a5a17386901ba00c6f403513e636f 100644 (file)
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -43,7 +43,7 @@ enum oom_constraint {
 extern void compare_swap_oom_score_adj(int old_val, int new_val);
 extern int test_set_oom_score_adj(int new_val);
 
-extern unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *mem,
+extern unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *memcg,
                        const nodemask_t *nodemask, unsigned long totalpages);
 extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
 extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 2148b122779b5a2fd8421c5e15cfc9ca91ea85ff..5ee84fb941e27d1633bf13a671e2787f97be5dbc 100644 (file)
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -157,7 +157,7 @@ static inline void page_dup_rmap(struct page *page)
  * Called from mm/vmscan.c to handle paging out
  */
 int page_referenced(struct page *, int is_locked,
-                       struct mem_cgroup *cnt, unsigned long *vm_flags);
+                       struct mem_cgroup *memcg, unsigned long *vm_flags);
 int page_referenced_one(struct page *, struct vm_area_struct *,
        unsigned long address, unsigned int *mapcount, unsigned long *vm_flags);
 
@@ -235,7 +235,7 @@ int rmap_walk(struct page *page, int (*rmap_one)(struct page *,
 #define anon_vma_link(vma)     do {} while (0)
 
 static inline int page_referenced(struct page *page, int is_locked,
-                                 struct mem_cgroup *cnt,
+                                 struct mem_cgroup *memcg,
                                  unsigned long *vm_flags)
 {
        *vm_flags = 0;

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 4425f62f37df9a72e3d518fc03a03ff828ebaa88..859ed879b2d8608838ff417fbb571642dd0ffd50 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2778,12 +2778,12 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  */
 int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
                                 struct page *page,
-                                gfp_t mask, struct mem_cgroup **ptr)
+                                gfp_t mask, struct mem_cgroup **memcgp)
 {
        struct mem_cgroup *memcg;
        int ret;
 
-       *ptr = NULL;
+       *memcgp = NULL;
 
        if (mem_cgroup_disabled())
                return 0;
@@ -2801,27 +2801,27 @@ int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
        memcg = try_get_mem_cgroup_from_page(page);
        if (!memcg)
                goto charge_cur_mm;
-       *ptr = memcg;
-       ret = __mem_cgroup_try_charge(NULL, mask, 1, ptr, true);
+       *memcgp = memcg;
+       ret = __mem_cgroup_try_charge(NULL, mask, 1, memcgp, true);
        css_put(&memcg->css);
        return ret;
 charge_cur_mm:
        if (unlikely(!mm))
                mm = &init_mm;
-       return __mem_cgroup_try_charge(mm, mask, 1, ptr, true);
+       return __mem_cgroup_try_charge(mm, mask, 1, memcgp, true);
 }
 
 static void
-__mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *ptr,
+__mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *memcg,
                                        enum charge_type ctype)
 {
        if (mem_cgroup_disabled())
                return;
-       if (!ptr)
+       if (!memcg)
                return;
-       cgroup_exclude_rmdir(&ptr->css);
+       cgroup_exclude_rmdir(&memcg->css);
 
-       __mem_cgroup_commit_charge_lrucare(page, ptr, ctype);
+       __mem_cgroup_commit_charge_lrucare(page, memcg, ctype);
        /*
         * Now swap is on-memory. This means this page may be
         * counted both as mem and swap....double count.
@@ -2831,21 +2831,22 @@ __mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *ptr,
         */
        if (do_swap_account && PageSwapCache(page)) {
                swp_entry_t ent = {.val = page_private(page)};
+               struct mem_cgroup *swap_memcg;
                unsigned short id;
-               struct mem_cgroup *memcg;
 
                id = swap_cgroup_record(ent, 0);
                rcu_read_lock();
-               memcg = mem_cgroup_lookup(id);
-               if (memcg) {
+               swap_memcg = mem_cgroup_lookup(id);
+               if (swap_memcg) {
                        /*
                         * This recorded memcg can be obsolete one. So, avoid
                         * calling css_tryget
                         */
-                       if (!mem_cgroup_is_root(memcg))
-                               res_counter_uncharge(&memcg->memsw, PAGE_SIZE);
-                       mem_cgroup_swap_statistics(memcg, false);
-                       mem_cgroup_put(memcg);
+                       if (!mem_cgroup_is_root(swap_memcg))
+                               res_counter_uncharge(&swap_memcg->memsw,
+                                                    PAGE_SIZE);
+                       mem_cgroup_swap_statistics(swap_memcg, false);
+                       mem_cgroup_put(swap_memcg);
                }
                rcu_read_unlock();
        }
@@ -2854,13 +2855,14 @@ __mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *ptr,
         * So, rmdir()->pre_destroy() can be called while we do this charge.
         * In that case, we need to call pre_destroy() again. check it here.
         */
-       cgroup_release_and_wakeup_rmdir(&ptr->css);
+       cgroup_release_and_wakeup_rmdir(&memcg->css);
 }
 
-void mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *ptr)
+void mem_cgroup_commit_charge_swapin(struct page *page,
+                                    struct mem_cgroup *memcg)
 {
-       __mem_cgroup_commit_charge_swapin(page, ptr,
-                                       MEM_CGROUP_CHARGE_TYPE_MAPPED);
+       __mem_cgroup_commit_charge_swapin(page, memcg,
+                                         MEM_CGROUP_CHARGE_TYPE_MAPPED);
 }
 
 void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
@@ -3189,14 +3191,14 @@ static inline int mem_cgroup_move_swap_account(swp_entry_t entry,
  * page belongs to.
  */
 int mem_cgroup_prepare_migration(struct page *page,
-       struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask)
+       struct page *newpage, struct mem_cgroup **memcgp, gfp_t gfp_mask)
 {
        struct mem_cgroup *memcg = NULL;
        struct page_cgroup *pc;
        enum charge_type ctype;
        int ret = 0;
 
-       *ptr = NULL;
+       *memcgp = NULL;
 
        VM_BUG_ON(PageTransHuge(page));
        if (mem_cgroup_disabled())
@@ -3247,10 +3249,10 @@ int mem_cgroup_prepare_migration(struct page *page,
        if (!memcg)
                return 0;
 
-       *ptr = memcg;
-       ret = __mem_cgroup_try_charge(NULL, gfp_mask, 1, ptr, false);
+       *memcgp = memcg;
+       ret = __mem_cgroup_try_charge(NULL, gfp_mask, 1, memcgp, false);
        css_put(&memcg->css);/* drop extra refcnt */
-       if (ret || *ptr == NULL) {
+       if (ret || *memcgp == NULL) {
                if (PageAnon(page)) {
                        lock_page_cgroup(pc);
                        ClearPageCgroupMigration(pc);

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 6dfd07d5eaf30a064752b9770d48a896860ac5ee..e2e1402a115c5a2d2e10310919b9a4395ba0fe11 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -146,7 +146,7 @@ struct task_struct *find_lock_task_mm(struct task_struct *p)
 
 /* return true if the task is not adequate as candidate victim task. */
 static bool oom_unkillable_task(struct task_struct *p,
-               const struct mem_cgroup *mem, const nodemask_t *nodemask)
+               const struct mem_cgroup *memcg, const nodemask_t *nodemask)
 {
        if (is_global_init(p))
                return true;
@@ -154,7 +154,7 @@ static bool oom_unkillable_task(struct task_struct *p,
                return true;
 
        /* When mem_cgroup_out_of_memory() and p is not member of the group */
-       if (mem && !task_in_mem_cgroup(p, mem))
+       if (memcg && !task_in_mem_cgroup(p, memcg))
                return true;
 
        /* p may not have freeable memory in nodemask */
@@ -173,12 +173,12 @@ static bool oom_unkillable_task(struct task_struct *p,
  * predictable as possible.  The goal is to return the highest value for the
  * task consuming the most memory to avoid subsequent oom failures.
  */
-unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *mem,
+unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *memcg,
                      const nodemask_t *nodemask, unsigned long totalpages)
 {
        int points;
 
-       if (oom_unkillable_task(p, mem, nodemask))
+       if (oom_unkillable_task(p, memcg, nodemask))
                return 0;
 
        p = find_lock_task_mm(p);
@@ -302,7 +302,7 @@ static enum oom_constraint constrained_alloc(struct zonelist *zonelist,
  * (not docbooked, we don't want this one cluttering up the manual)
  */
 static struct task_struct *select_bad_process(unsigned int *ppoints,
-               unsigned long totalpages, struct mem_cgroup *mem,
+               unsigned long totalpages, struct mem_cgroup *memcg,
                const nodemask_t *nodemask)
 {
        struct task_struct *g, *p;
@@ -314,7 +314,7 @@ static struct task_struct *select_bad_process(unsigned int *ppoints,
 
                if (p->exit_state)
                        continue;
-               if (oom_unkillable_task(p, mem, nodemask))
+               if (oom_unkillable_task(p, memcg, nodemask))
                        continue;
 
                /*
@@ -358,7 +358,7 @@ static struct task_struct *select_bad_process(unsigned int *ppoints,
                        }
                }
 
-               points = oom_badness(p, mem, nodemask, totalpages);
+               points = oom_badness(p, memcg, nodemask, totalpages);
                if (points > *ppoints) {
                        chosen = p;
                        *ppoints = points;
@@ -381,14 +381,14 @@ static struct task_struct *select_bad_process(unsigned int *ppoints,
  *
  * Call with tasklist_lock read-locked.
  */
-static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *nodemask)
+static void dump_tasks(const struct mem_cgroup *memcg, const nodemask_t *nodemask)
 {
        struct task_struct *p;
        struct task_struct *task;
 
        pr_info("[ pid ]   uid  tgid total_vm      rss cpu oom_adj oom_score_adj name\n");
        for_each_process(p) {
-               if (oom_unkillable_task(p, mem, nodemask))
+               if (oom_unkillable_task(p, memcg, nodemask))
                        continue;
 
                task = find_lock_task_mm(p);
@@ -411,7 +411,7 @@ static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *nodemask)
 }
 
 static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order,
-                       struct mem_cgroup *mem, const nodemask_t *nodemask)
+                       struct mem_cgroup *memcg, const nodemask_t *nodemask)
 {
        task_lock(current);
        pr_warning("%s invoked oom-killer: gfp_mask=0x%x, order=%d, "
@@ -421,10 +421,10 @@ static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order,
        cpuset_print_task_mems_allowed(current);
        task_unlock(current);
        dump_stack();
-       mem_cgroup_print_oom_info(mem, p);
+       mem_cgroup_print_oom_info(memcg, p);
        show_mem(SHOW_MEM_FILTER_NODES);
        if (sysctl_oom_dump_tasks)
-               dump_tasks(mem, nodemask);
+               dump_tasks(memcg, nodemask);
 }
 
 #define K(x) ((x) << (PAGE_SHIFT-10))
@@ -478,7 +478,7 @@ static int oom_kill_task(struct task_struct *p)
 
 static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
                            unsigned int points, unsigned long totalpages,
-                           struct mem_cgroup *mem, nodemask_t *nodemask,
+                           struct mem_cgroup *memcg, nodemask_t *nodemask,
                            const char *message)
 {
        struct task_struct *victim = p;
@@ -487,7 +487,7 @@ static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
        unsigned int victim_points = 0;
 
        if (printk_ratelimit())
-               dump_header(p, gfp_mask, order, mem, nodemask);
+               dump_header(p, gfp_mask, order, memcg, nodemask);
 
        /*
         * If the task is already exiting, don't alarm the sysadmin or kill
@@ -518,7 +518,7 @@ static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
                        /*
                         * oom_badness() returns 0 if the thread is unkillable
                         */
-                       child_points = oom_badness(child, mem, nodemask,
+                       child_points = oom_badness(child, memcg, nodemask,
                                                                totalpages);
                        if (child_points > victim_points) {
                                victim = child;
@@ -555,7 +555,7 @@ static void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask,
 }
 
 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
-void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask)
+void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask)
 {
        unsigned long limit;
        unsigned int points = 0;
@@ -572,14 +572,14 @@ void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask)
        }
 
        check_panic_on_oom(CONSTRAINT_MEMCG, gfp_mask, 0, NULL);
-       limit = mem_cgroup_get_limit(mem) >> PAGE_SHIFT;
+       limit = mem_cgroup_get_limit(memcg) >> PAGE_SHIFT;
        read_lock(&tasklist_lock);
 retry:
-       p = select_bad_process(&points, limit, mem, NULL);
+       p = select_bad_process(&points, limit, memcg, NULL);
        if (!p || PTR_ERR(p) == -1UL)
                goto out;
 
-       if (oom_kill_process(p, gfp_mask, 0, points, limit, mem, NULL,
+       if (oom_kill_process(p, gfp_mask, 0, points, limit, memcg, NULL,
                                "Memory cgroup out of memory"))
                goto retry;
 out:

diff --git a/mm/rmap.c b/mm/rmap.c
index 60aa349dbd2af456da603e6097a2efffb1beaf2b..54d140a7cd225da6d40f1ed9a6aa54e8df3094aa 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -727,7 +727,7 @@ out:
 }
 
 static int page_referenced_anon(struct page *page,
-                               struct mem_cgroup *mem_cont,
+                               struct mem_cgroup *memcg,
                                unsigned long *vm_flags)
 {
        unsigned int mapcount;
@@ -750,7 +750,7 @@ static int page_referenced_anon(struct page *page,
                 * counting on behalf of references from different
                 * cgroups
                 */
-               if (mem_cont && !mm_match_cgroup(vma->vm_mm, mem_cont))
+               if (memcg && !mm_match_cgroup(vma->vm_mm, memcg))
                        continue;
                referenced += page_referenced_one(page, vma, address,
                                                  &mapcount, vm_flags);
@@ -765,7 +765,7 @@ static int page_referenced_anon(struct page *page,
 /**
  * page_referenced_file - referenced check for object-based rmap
  * @page: the page we're checking references on.
- * @mem_cont: target memory controller
+ * @memcg: target memory control group
  * @vm_flags: collect encountered vma->vm_flags who actually referenced the page
  *
  * For an object-based mapped page, find all the places it is mapped and
@@ -776,7 +776,7 @@ static int page_referenced_anon(struct page *page,
  * This function is only called from page_referenced for object-based pages.
  */
 static int page_referenced_file(struct page *page,
-                               struct mem_cgroup *mem_cont,
+                               struct mem_cgroup *memcg,
                                unsigned long *vm_flags)
 {
        unsigned int mapcount;
@@ -818,7 +818,7 @@ static int page_referenced_file(struct page *page,
                 * counting on behalf of references from different
                 * cgroups
                 */
-               if (mem_cont && !mm_match_cgroup(vma->vm_mm, mem_cont))
+               if (memcg && !mm_match_cgroup(vma->vm_mm, memcg))
                        continue;
                referenced += page_referenced_one(page, vma, address,
                                                  &mapcount, vm_flags);
@@ -834,7 +834,7 @@ static int page_referenced_file(struct page *page,
  * page_referenced - test if the page was referenced
  * @page: the page to test
  * @is_locked: caller holds lock on the page
- * @mem_cont: target memory controller
+ * @memcg: target memory cgroup
  * @vm_flags: collect encountered vma->vm_flags who actually referenced the page
  *
  * Quick test_and_clear_referenced for all mappings to a page,
@@ -842,7 +842,7 @@ static int page_referenced_file(struct page *page,
  */
 int page_referenced(struct page *page,
                    int is_locked,
-                   struct mem_cgroup *mem_cont,
+                   struct mem_cgroup *memcg,
                    unsigned long *vm_flags)
 {
        int referenced = 0;
@@ -858,13 +858,13 @@ int page_referenced(struct page *page,
                        }
                }
                if (unlikely(PageKsm(page)))
-                       referenced += page_referenced_ksm(page, mem_cont,
+                       referenced += page_referenced_ksm(page, memcg,
                                                                vm_flags);
                else if (PageAnon(page))
-                       referenced += page_referenced_anon(page, mem_cont,
+                       referenced += page_referenced_anon(page, memcg,
                                                                vm_flags);
                else if (page->mapping)
-                       referenced += page_referenced_file(page, mem_cont,
+                       referenced += page_referenced_file(page, memcg,
                                                                vm_flags);
                if (we_locked)
                        unlock_page(page);

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 82fa835ed5f1c1f644dab682910cad8bde3b0718..5758d89d5f5eee71d459e7d6eb458d1e5af325e5 100644 (file)
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -850,12 +850,13 @@ unsigned int count_swap_pages(int type, int free)
 static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
                unsigned long addr, swp_entry_t entry, struct page *page)
 {
-       struct mem_cgroup *ptr;
+       struct mem_cgroup *memcg;
        spinlock_t *ptl;
        pte_t *pte;
        int ret = 1;
 
-       if (mem_cgroup_try_charge_swapin(vma->vm_mm, page, GFP_KERNEL, &ptr)) {
+       if (mem_cgroup_try_charge_swapin(vma->vm_mm, page,
+                                        GFP_KERNEL, &memcg)) {
                ret = -ENOMEM;
                goto out_nolock;
        }
@@ -863,7 +864,7 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
        pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
        if (unlikely(!pte_same(*pte, swp_entry_to_pte(entry)))) {
                if (ret > 0)
-                       mem_cgroup_cancel_charge_swapin(ptr);
+                       mem_cgroup_cancel_charge_swapin(memcg);
                ret = 0;
                goto out;
        }
@@ -874,7 +875,7 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
        set_pte_at(vma->vm_mm, addr, pte,
                   pte_mkold(mk_pte(page, vma->vm_page_prot)));
        page_add_anon_rmap(page, vma, addr);
-       mem_cgroup_commit_charge_swapin(page, ptr);
+       mem_cgroup_commit_charge_swapin(page, memcg);
        swap_free(entry);
        /*
         * Move the page to the active list so it is not

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 0ba7d3567dda25cceaf99c861e447272346d18b5..1715e4e88d22a230b9f181e3e9bbb1ce6d8b59d2 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2375,7 +2375,7 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
 
 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
 
-unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
+unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *memcg,
                                                gfp_t gfp_mask, bool noswap,
                                                struct zone *zone,
                                                unsigned long *nr_scanned)
@@ -2387,10 +2387,10 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
                .may_unmap = 1,
                .may_swap = !noswap,
                .order = 0,
-               .target_mem_cgroup = mem,
+               .target_mem_cgroup = memcg,
        };
        struct mem_cgroup_zone mz = {
-               .mem_cgroup = mem,
+               .mem_cgroup = memcg,
                .zone = zone,
        };
 
@@ -2416,7 +2416,7 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
        return sc.nr_reclaimed;
 }
 
-unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
+unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,
                                           gfp_t gfp_mask,
                                           bool noswap)
 {
@@ -2429,7 +2429,7 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
                .may_swap = !noswap,
                .nr_to_reclaim = SWAP_CLUSTER_MAX,
                .order = 0,
-               .target_mem_cgroup = mem_cont,
+               .target_mem_cgroup = memcg,
                .nodemask = NULL, /* we don't care the placement */
                .gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
                                (GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK),
@@ -2443,7 +2443,7 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
         * take care of from where we get pages. So the node where we start the
         * scan does not need to be the current node.
         */
-       nid = mem_cgroup_select_victim_node(mem_cont);
+       nid = mem_cgroup_select_victim_node(memcg);
 
        zonelist = NODE_DATA(nid)->node_zonelists;