LU-13783 libcfs: switch from ->mmap_sem to mmap_lock()

[fs/lustre-release.git] / lustre / llite / llite_mmap.c

diff --git a/lustre/llite/llite_mmap.c b/lustre/llite/llite_mmap.c
index 8ac6698..ee41cdf 100644 (file)
--- a/lustre/llite/llite_mmap.c
+++ b/lustre/llite/llite_mmap.c
@@ -54,21 +54,22 @@ void policy_from_vma(union ldlm_policy_data *policy, struct vm_area_struct *vma,
 struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr,
                                size_t count)
 {
-        struct vm_area_struct *vma, *ret = NULL;
-        ENTRY;
+       struct vm_area_struct *vma, *ret = NULL;
+       ENTRY;
 
-        /* mmap_sem must have been held by caller. */
-        LASSERT(!down_write_trylock(&mm->mmap_sem));
+       /* mmap_lock must have been held by caller. */
+       LASSERT(!mmap_write_trylock(mm));
 
-        for(vma = find_vma(mm, addr);
-            vma != NULL && vma->vm_start < (addr + count); vma = vma->vm_next) {
-                if (vma->vm_ops && vma->vm_ops == &ll_file_vm_ops &&
-                    vma->vm_flags & VM_SHARED) {
-                        ret = vma;
-                        break;
-                }
-        }
-        RETURN(ret);
+       for (vma = find_vma(mm, addr);
+            vma != NULL && vma->vm_start < (addr + count);
+            vma = vma->vm_next) {
+               if (vma->vm_ops && vma->vm_ops == &ll_file_vm_ops &&
+                   vma->vm_flags & VM_SHARED) {
+                       ret = vma;
+                       break;
+               }
+       }
+       RETURN(ret);
 }
 
 /**