1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 4eef925477fc..927692734bcf 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -383,14 +383,14 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
                         get_file(file);
                         if (tmp->vm_flags & VM_DENYWRITE)
                                 atomic_dec(&inode->i_writecount);
-                        spin_lock(&mapping->i_mmap_lock);
+                        mutex_lock(&mapping->i_mmap_mutex);
                         if (tmp->vm_flags & VM_SHARED)
                                 mapping->i_mmap_writable++;
                         flush_dcache_mmap_lock(mapping);
                         /* insert tmp into the share list, just after mpnt */
                         vma_prio_tree_add(tmp, mpnt);
                         flush_dcache_mmap_unlock(mapping);
-                        spin_unlock(&mapping->i_mmap_lock);
+                        mutex_unlock(&mapping->i_mmap_mutex);
                 }
 
                 /*