pagewalk: add locking-rule comments

[pandora-kernel.git] / include / linux / mm.h

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 6321e84..3c5505a 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -911,6 +911,8 @@ unsigned long unmap_vmas(struct mmu_gather *tlb,
  * @pte_entry: if set, called for each non-empty PTE (4th-level) entry
  * @pte_hole: if set, called for each hole at all levels
  * @hugetlb_entry: if set, called for each hugetlb entry
+ *                *Caution*: The caller must hold mmap_sem() if @hugetlb_entry
+ *                           is used.
  *
  * (see walk_page_range for more details)
  */