The quilt patch titled
Subject: mm/gup: add an assertion that the mmap lock is locked
has been removed from the -mm tree. Its filename was
mm-gup-add-an-assertion-that-the-mmap-lock-is-locked.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Jason Gunthorpe <jgg@xxxxxxxxxx>
Subject: mm/gup: add an assertion that the mmap lock is locked
Date: Tue, 24 Jan 2023 16:34:27 -0400
Since commit 5b78ed24e8ec ("mm/pagemap: add mmap_assert_locked()
annotations to find_vma*()") we already have this assertion, it is just
buried in find_vma():
__get_user_pages_locked()
__get_user_pages()
find_extend_vma()
find_vma()
Also check it at the top of __get_user_pages_locked() as a form of
documentation.
Link: https://lkml.kernel.org/r/6-v2-987e91b59705+36b-gup_tidy_jgg@xxxxxxxxxx
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Reviewed-by: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/gup.c | 2 ++
1 file changed, 2 insertions(+)
--- a/mm/gup.c~mm-gup-add-an-assertion-that-the-mmap-lock-is-locked
+++ a/mm/gup.c
@@ -1360,6 +1360,8 @@ static __always_inline long __get_user_p
must_unlock = true;
*locked = 1;
}
+ else
+ mmap_assert_locked(mm);
if (flags & FOLL_PIN)
mm_set_has_pinned_flag(&mm->flags);
_
Patches currently in -mm which might be from jgg@xxxxxxxxxx are
