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-rw-r--r--mm/mlock.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/mlock.c b/mm/mlock.c
index 3446b7ef731e..4d3fea267e0d 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)