diff --git a/fs/proc/base.c b/fs/proc/base.c
index 62ec367d7f943cad7ff7ae799d9cb5a34ca54e47..7a89f1f0c8f0cb17901b087f5d768b0ba660fb25 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -3481,7 +3481,7 @@ static const struct pid_entry tgid_base_stuff[] = {
 	REG("smart_grid_level", 0640, proc_pid_sg_level_operations),
 #endif
 #ifdef CONFIG_FAST_SYSCALL
-	REG("xcall", 0644, proc_pid_xcall_operations),
+	REG("xcall", 0640, proc_pid_xcall_operations),
 #endif
 #ifdef CONFIG_SCHED_AUTOGROUP
 	REG("autogroup",  S_IRUGO|S_IWUSR, proc_pid_sched_autogroup_operations),