summaryrefslogtreecommitdiffstats
path: root/mm/pagewalk.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/pagewalk.c')
-rw-r--r--mm/pagewalk.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index ee4ff87c58c1..f7929406e776 100644
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -181,6 +181,9 @@ static int walk_hugetlb_range(struct vm_area_struct *vma,
*
* If any callback returns a non-zero value, the walk is aborted and
* the return value is propagated back to the caller. Otherwise 0 is returned.
+ *
+ * walk->mm->mmap_sem must be held for at least read if walk->hugetlb_entry
+ * is !NULL.
*/
int walk_page_range(unsigned long addr, unsigned long end,
struct mm_walk *walk)