mm: page_counter: pull "-1" handling out of page_counter_memparse()

The unified hierarchy interface for memory cgroups will no longer use "-1"
to mean maximum possible resource value.  In preparation for this, make
the string an argument and let the caller supply it.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Cc: Greg Thelen <gthelen@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index dc5c4cd0afdf..6453ea5a27aa 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3414,7 +3414,7 @@ static ssize_t mem_cgroup_write(struct kernfs_open_file *of,
         int ret;
 
         buf = strstrip(buf);
-        ret = page_counter_memparse(buf, &nr_pages);
+        ret = page_counter_memparse(buf, "-1", &nr_pages);
         if (ret)
                 return ret;
 
@@ -3786,7 +3786,7 @@ static int __mem_cgroup_usage_register_event(struct mem_cgroup *memcg,
         unsigned long usage;
         int i, size, ret;
 
-        ret = page_counter_memparse(args, &threshold);
+        ret = page_counter_memparse(args, "-1", &threshold);
         if (ret)
                 return ret;