Re: [PATCH 09/14] m68k: drop custom __access_ok()
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- To: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
- Subject: Re: [PATCH 09/14] m68k: drop custom __access_ok()
- From: Christoph Hellwig <hch@xxxxxx>
- Date: Tue, 15 Feb 2022 07:29:42 +0100
- Cc: Arnd Bergmann <arnd@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, linux-arch@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-api@xxxxxxxxxxxxxxx, arnd@xxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux@xxxxxxxxxxxxxxx, will@xxxxxxxxxx, guoren@xxxxxxxxxx, bcain@xxxxxxxxxxxxxx, geert@xxxxxxxxxxxxxx, monstr@xxxxxxxxx, tsbogend@xxxxxxxxxxxxxxxx, nickhu@xxxxxxxxxxxxx, green.hu@xxxxxxxxx, dinguyen@xxxxxxxxxx, shorne@xxxxxxxxx, deller@xxxxxx, mpe@xxxxxxxxxxxxxx, peterz@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, mark.rutland@xxxxxxx, hca@xxxxxxxxxxxxx, dalias@xxxxxxxx, davem@xxxxxxxxxxxxx, richard@xxxxxx, x86@xxxxxxxxxx, jcmvbkbc@xxxxxxxxx, ebiederm@xxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, ardb@xxxxxxxxxx, linux-alpha@xxxxxxxxxxxxxxx, linux-snps-arc@xxxxxxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-csky@xxxxxxxxxxxxxxx, linux-hexagon@xxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-m68k@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, openrisc@xxxxxxxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linux-um@xxxxxxxxxxxxxxxxxxx, linux-xtensa@xxxxxxxxxxxxxxxx
- In-reply-to: <Ygr11RGjj3C9uAUg@zeniv-ca.linux.org.uk>
- References: <20220214163452.1568807-1-arnd@kernel.org> <20220214163452.1568807-10-arnd@kernel.org> <Ygr11RGjj3C9uAUg@zeniv-ca.linux.org.uk>
- User-agent: Mutt/1.5.17 (2007-11-01)
On Tue, Feb 15, 2022 at 12:37:41AM +0000, Al Viro wrote:
> Perhaps simply wrap that sucker into #ifdef CONFIG_CPU_HAS_ADDRESS_SPACES
> (and trim the comment down to "coldfire and 68000 will pick generic
> variant")?
I wonder if we should invert CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE,
select the separate address space config for s390, sparc64, non-coldfire
m68k and mips with EVA and then just have one single access_ok for
overlapping address space (as added by Arnd) and non-overlapping ones
(always return true).
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