linux-kernel - [PATCH 2/2] mm: document FAULT_FLAG_VMA

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Message-ID: <20230301022720.1380780-2-surenb@google.com>
Date:   Tue, 28 Feb 2023 18:27:20 -0800
From:   Suren Baghdasaryan <surenb@...gle.com>
To:     akpm@...ux-foundation.org
Cc:     sfr@...b.auug.org.au, error27@...il.com, willy@...radead.org,
        david@...hat.com, Liam.Howlett@...cle.com, jgg@...pe.ca,
        yuzhao@...gle.com, dhowells@...hat.com, hughd@...gle.com,
        mathieu.desnoyers@...icios.com, pasha.tatashin@...een.com,
        laurent.dufour@...ibm.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, surenb@...gle.com
Subject: [PATCH 2/2] mm: document FAULT_FLAG_VMA_LOCK flag

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@...b.auug.org.au>
Link: https://lore.kernel.org/all/20230301113648.7c279865@canb.auug.org.au/
Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
---
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