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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2015-12-23 14:53:27 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2015-12-28 10:42:07 -0500 |
| commit | eed67d75b66748a498a0592d9704081a98509444 (patch) | |
| tree | 098921068889614ab3d042c37ce6a73a1ad27e47 /mm/memcontrol.c | |
| parent | 6bf024e69333f9371c634aa4cf04c95da86697f4 (diff) | |
| download | lwn-eed67d75b66748a498a0592d9704081a98509444.tar.gz lwn-eed67d75b66748a498a0592d9704081a98509444.zip | |
cgroup: Fix uninitialized variable warning
Commit 1f7dd3e5a6e4 ("cgroup: fix handling of multi-destination migration
from subtree_control enabling") introduced the following compiler warning:
mm/memcontrol.c: In function ‘mem_cgroup_can_attach’:
mm/memcontrol.c:4790:9: warning: ‘memcg’ may be used uninitialized in this function [-Wmaybe-uninitialized]
mc.to = memcg;
^
Fix this by initializing 'memcg' to NULL.
This was found using gcc (GCC) 4.9.2 20150212 (Red Hat 4.9.2-6).
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c92a65b2b4ab..7ca43ebe13c0 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4782,7 +4782,7 @@ static void mem_cgroup_clear_mc(void) static int mem_cgroup_can_attach(struct cgroup_taskset *tset) { struct cgroup_subsys_state *css; - struct mem_cgroup *memcg; + struct mem_cgroup *memcg = NULL; /* unneeded init to make gcc happy */ struct mem_cgroup *from; struct task_struct *leader, *p; struct mm_struct *mm; |