Re: [PATCH 02/23] arm64: allow pte_offset_map() to fail
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- To: Hugh Dickins <hughd@xxxxxxxxxx>
- Subject: Re: [PATCH 02/23] arm64: allow pte_offset_map() to fail
- From: Catalin Marinas <catalin.marinas@xxxxxxx>
- Date: Thu, 25 May 2023 17:37:16 +0100
- Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Mike Kravetz <mike.kravetz@xxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxx>, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>, Greg Ungerer <gerg@xxxxxxxxxxxxxx>, Michal Simek <monstr@xxxxxxxxx>, Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>, Helge Deller <deller@xxxxxx>, John David Anglin <dave.anglin@xxxxxxxx>, "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>, John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Chris Zankel <chris@xxxxxxxxxx>, Max Filippov <jcmvbkbc@xxxxxxxxx>, x86@xxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-m68k@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx
- In-reply-to: <e72f6f3e-a8d4-3ed-2b4-5d3ced41484@google.com>
- References: <77a5d8c-406b-7068-4f17-23b7ac53bc83@google.com> <e72f6f3e-a8d4-3ed-2b4-5d3ced41484@google.com>
On Tue, May 09, 2023 at 09:43:47PM -0700, Hugh Dickins wrote:
> In rare transient cases, not yet made possible, pte_offset_map() and
> pte_offset_map_lock() may not find a page table: handle appropriately.
>
> Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
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