cgroup/misc: Store atomic64_t reads to u64

Change 'new_usage' type to u64 so it can be compared with unsigned 'max'
and 'capacity' properly even if the value crosses the signed boundary.

Signed-off-by: Haitao Huang <haitao.huang@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/kernel/cgroup/misc.c b/kernel/cgroup/misc.c
index abbe9aa5cdd17b0c20cf06c05ba562e7d46b8034..79a3717a5803aa40c7674edc8e0c37443168b33f 100644 (file)
--- a/kernel/cgroup/misc.c
+++ b/kernel/cgroup/misc.c
@@ -142,7 +142,7 @@ int misc_cg_try_charge(enum misc_res_type type, struct misc_cg *cg, u64 amount)
        struct misc_cg *i, *j;
        int ret;
        struct misc_res *res;
-       s64 new_usage;
+       u64 new_usage;
 
        if (!(valid_type(type) && cg && READ_ONCE(misc_res_capacity[type])))
                return -EINVAL;