[PATCH 2/2] mm: document FAULT_FLAG_VMA_LOCK flag

[Suren Baghdasaryan]

FAULT_FLAG_VMA_LOCK flag was introduced without proper description. Fix
this by documenting it.

Fixes: 863be34fc093 ("mm: add FAULT_FLAG_VMA_LOCK flag")
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/all/20230301113648.7c279865@xxxxxxxxxxxxxxxx/
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
---
Fix cleanly apply over mm-unstable, SHA in "Fixes" is from that tree.

 include/linux/mm_types.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 89bbf7d8a312..ef74ea892c5b 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -1064,6 +1064,7 @@ typedef struct {
  *                      mapped after the fault.
  * @FAULT_FLAG_ORIG_PTE_VALID: whether the fault has vmf->orig_pte cached.
  *                        We should only access orig_pte if this flag set.
+ * @FAULT_FLAG_VMA_LOCK: The fault is handled under VMA lock.
  *
  * About @FAULT_FLAG_ALLOW_RETRY and @FAULT_FLAG_TRIED: we can specify
  * whether we would allow page faults to retry by specifying these two
-- 
2.39.2.722.g9855ee24e9-goog