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Message-ID: <20230801220733.1987762-3-surenb@google.com>
Date: Tue, 1 Aug 2023 15:07:28 -0700
From: Suren Baghdasaryan <surenb@...gle.com>
To: akpm@...ux-foundation.org
Cc: torvalds@...ux-foundation.org, jannh@...gle.com,
willy@...radead.org, liam.howlett@...cle.com, david@...hat.com,
peterx@...hat.com, ldufour@...ux.ibm.com, vbabka@...e.cz,
michel@...pinasse.org, jglisse@...gle.com, mhocko@...e.com,
hannes@...xchg.org, dave@...olabs.net, hughd@...gle.com,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
stable@...r.kernel.org, Suren Baghdasaryan <surenb@...gle.com>
Subject: [PATCH v2 2/6] mm: for !CONFIG_PER_VMA_LOCK equate write lock
assertion for vma and mmap
When CONFIG_PER_VMA_LOCK=n, vma_assert_write_locked() should be equivalent
to mmap_assert_write_locked().
Suggested-by: Jann Horn <jannh@...gle.com>
Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
---
include/linux/mm.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 406ab9ea818f..262b5f44101d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -750,7 +750,8 @@ static inline void vma_end_read(struct vm_area_struct *vma) {}
static inline void vma_start_write(struct vm_area_struct *vma) {}
static inline bool vma_try_start_write(struct vm_area_struct *vma)
{ return true; }
-static inline void vma_assert_write_locked(struct vm_area_struct *vma) {}
+static inline void vma_assert_write_locked(struct vm_area_struct *vma)
+ { mmap_assert_write_locked(vma->vm_mm); }
static inline void vma_mark_detached(struct vm_area_struct *vma,
bool detached) {}
--
2.41.0.585.gd2178a4bd4-goog
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