1 files changed, 11 insertions, 0 deletions

diff --git a/mm/mlock.c b/mm/mlock.c
index 3446b7ef731..4d3fea267e0 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -10,7 +10,18 @@
 #include <linux/mm.h>
 #include <linux/mempolicy.h>
 #include <linux/syscalls.h>
+#include <linux/sched.h>
+#include <linux/module.h>
 
+int can_do_mlock(void)
+{
+        if (capable(CAP_IPC_LOCK))
+                return 1;
+        if (current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur != 0)
+                return 1;
+        return 0;
+}
+EXPORT_SYMBOL(can_do_mlock);
 
 static int mlock_fixup(struct vm_area_struct *vma, struct vm_area_struct **prev,
         unsigned long start, unsigned long end, unsigned int newflags)