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| author |   David Rientjes <rientjes@google.com> | 2008-02-09 00:10:15 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-09 11:08:33 -0800 |
| commit | 60c12b1202a60eabb1c61317e5d2678fcea9893f (patch) | |
| tree | 143e5bdbd10d32832fce9183500deebad6c6e4db /include/linux/memcontrol.h | |
| parent | UML: fix hostfs build (diff) | |
| download | linux-dev-60c12b1202a60eabb1c61317e5d2678fcea9893f.tar.xz linux-dev-60c12b1202a60eabb1c61317e5d2678fcea9893f.zip | |
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 'include/linux/memcontrol.h')
| -rw-r--r-- | include/linux/memcontrol.h | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 9815951ec995..925d57b236aa 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -51,10 +51,8 @@ extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask); int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); -static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm) -{ - return rcu_dereference(mm->mem_cgroup); -} +#define vm_match_cgroup(mm, cgroup) \ + ((cgroup) == rcu_dereference((mm)->mem_cgroup)) extern int mem_cgroup_prepare_migration(struct page *page); extern void mem_cgroup_end_migration(struct page *page); @@ -123,9 +121,9 @@ static inline int mem_cgroup_cache_charge(struct page *page, return 0; } -static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm) +static inline int vm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) { - return NULL; + return 1; } static inline int task_in_mem_cgroup(struct task_struct *task, |