Convert the comment into an assertion.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
mm/rmap.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/mm/rmap.c b/mm/rmap.c
index 2608c40dffad..619d4d65d99b 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -182,8 +182,6 @@ static void anon_vma_chain_link(struct vm_area_struct *vma,
* for the new allocation. At the same time, we do not want
* to do any locking for the common case of already having
* an anon_vma.
- *
- * This must be called with the mmap_lock held for reading.
*/
int __anon_vma_prepare(struct vm_area_struct *vma)
{
@@ -191,6 +189,7 @@ int __anon_vma_prepare(struct vm_area_struct *vma)
struct anon_vma *anon_vma, *allocated;
struct anon_vma_chain *avc;
+ mmap_assert_locked(mm);
might_sleep();
avc = anon_vma_chain_alloc(GFP_KERNEL);
--
2.43.0
