Merge remote-tracking branch 'lsk/v3.10/topic/gator' into linux-linaro-lsk

[firefly-linux-kernel-4.4.55.git] / kernel / user_namespace.c

diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index 9064b919a4066fe9fca676581479e9162de56717..9bea1d7dd21fac61c2084cb5bc295c1980c2573e 100644 (file)
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -148,7 +148,7 @@ static u32 map_id_range_down(struct uid_gid_map *map, u32 id, u32 count)
 
        /* Find the matching extent */
        extents = map->nr_extents;
-       smp_read_barrier_depends();
+       smp_rmb();
        for (idx = 0; idx < extents; idx++) {
                first = map->extent[idx].first;
                last = first + map->extent[idx].count - 1;
@@ -172,7 +172,7 @@ static u32 map_id_down(struct uid_gid_map *map, u32 id)
 
        /* Find the matching extent */
        extents = map->nr_extents;
-       smp_read_barrier_depends();
+       smp_rmb();
        for (idx = 0; idx < extents; idx++) {
                first = map->extent[idx].first;
                last = first + map->extent[idx].count - 1;
@@ -195,7 +195,7 @@ static u32 map_id_up(struct uid_gid_map *map, u32 id)
 
        /* Find the matching extent */
        extents = map->nr_extents;
-       smp_read_barrier_depends();
+       smp_rmb();
        for (idx = 0; idx < extents; idx++) {
                first = map->extent[idx].lower_first;
                last = first + map->extent[idx].count - 1;
@@ -611,9 +611,8 @@ static ssize_t map_write(struct file *file, const char __user *buf,
         * were written before the count of the extents.
         *
         * To achieve this smp_wmb() is used on guarantee the write
-        * order and smp_read_barrier_depends() is guaranteed that we
-        * don't have crazy architectures returning stale data.
-        *
+        * order and smp_rmb() is guaranteed that we don't have crazy
+        * architectures returning stale data.
         */
        mutex_lock(&id_map_mutex);