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authorDavid Rientjes <rientjes@google.com>2008-02-09 00:10:15 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-09 11:08:33 -0800
commit60c12b1202a60eabb1c61317e5d2678fcea9893f (patch)
tree143e5bdbd10d32832fce9183500deebad6c6e4db /mm
parent6966a97753854c8b5336cf3997d5d1d205d91b12 (diff)
memcontrol: add vm_match_cgroup()
mm_cgroup() is exclusively used to test whether an mm's mem_cgroup pointer is pointing to a specific cgroup. Instead of returning the pointer, we can just do the test itself in a new macro: vm_match_cgroup(mm, cgroup) returns non-zero if the mm's mem_cgroup points to cgroup. Otherwise it returns zero. Signed-off-by: David Rientjes <rientjes@google.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memcontrol.c2
-rw-r--r--mm/rmap.c4
2 files changed, 3 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5c2c702af61..6bded84c20c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -399,7 +399,7 @@ int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem)
int ret;
task_lock(task);
- ret = task->mm && mm_cgroup(task->mm) == mem;
+ ret = task->mm && vm_match_cgroup(task->mm, mem);
task_unlock(task);
return ret;
}
diff --git a/mm/rmap.c b/mm/rmap.c
index a0e92a263d1..8fd527c4e2b 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -321,7 +321,7 @@ static int page_referenced_anon(struct page *page,
* counting on behalf of references from different
* cgroups
*/
- if (mem_cont && (mm_cgroup(vma->vm_mm) != mem_cont))
+ if (mem_cont && !vm_match_cgroup(vma->vm_mm, mem_cont))
continue;
referenced += page_referenced_one(page, vma, &mapcount);
if (!mapcount)
@@ -382,7 +382,7 @@ static int page_referenced_file(struct page *page,
* counting on behalf of references from different
* cgroups
*/
- if (mem_cont && (mm_cgroup(vma->vm_mm) != mem_cont))
+ if (mem_cont && !vm_match_cgroup(vma->vm_mm, mem_cont))
continue;
if ((vma->vm_flags & (VM_LOCKED|VM_MAYSHARE))
== (VM_LOCKED|VM_MAYSHARE)) {