cpuset: Fix incorrect memory_pressure control file mapping

The memory_pressure control file was incorrectly set up without
a private value (0, by default). As a result, this control
file was treated like memory_migrate on read. By adding back the
FILE_MEMORY_PRESSURE private value, the correct memory pressure value
will be returned.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 7dbdb199d3bf ("cgroup: replace cftype->mode with CFTYPE_WORLD_WRITABLE")
Cc: stable@vger.kernel.org # v4.4+

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index ca8376e5008c7c16ca91175e3ad1021ec69e2777..8362bac0d1793d14c67c14ca110e98e5a3496b22 100644 (file)
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -1891,6 +1891,7 @@ static struct cftype files[] = {
        {
                .name = "memory_pressure",
                .read_u64 = cpuset_read_u64,
+               .private = FILE_MEMORY_PRESSURE,
        },
 
        {