1 files changed, 3 insertions, 1 deletions

diff --git a/ipc/shm.c b/ipc/shm.c
index d0259e3ad1c0..a86a3a5c8a19 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -268,7 +268,9 @@ static int shm_mmap(struct file * file, struct vm_area_struct * vma)
         if (ret != 0)
                 return ret;
         sfd->vm_ops = vma->vm_ops;
+#ifdef CONFIG_MMU
         BUG_ON(!sfd->vm_ops->fault);
+#endif
         vma->vm_ops = &shm_vm_ops;
         shm_open(vma);
 
@@ -714,7 +716,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
                         struct user_struct * user = current->user;
                         if (!is_file_hugepages(shp->shm_file)) {
                                 err = shmem_lock(shp->shm_file, 1, user);
-                                if (!err) {
+                                if (!err && !(shp->shm_perm.mode & SHM_LOCKED)){
                                         shp->shm_perm.mode |= SHM_LOCKED;
                                         shp->mlock_user = user;
                                 }