From: Al Viro <viro@zeniv.linux.org.uk>
To: Christoph Hellwig <hch@lst.de>
Cc: mark.rutland@arm.com, dalias@libc.org,
linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org,
peterz@infradead.org, linux-mips@vger.kernel.org,
linux-mm@kvack.org, guoren@kernel.org,
sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org,
linux-riscv@lists.infradead.org, will@kernel.org,
ardb@kernel.org, linux-arch@vger.kernel.org,
linux-s390@vger.kernel.org, bcain@codeaurora.org, deller@gmx.de,
x86@kernel.org, linux@armlinux.org.uk,
linux-csky@vger.kernel.org, mingo@redhat.com,
geert@linux-m68k.org, linux-snps-arc@lists.infradead.org,
linux-xtensa@linux-xtensa.org, arnd@arndb.de, hca@linux.ibm.com,
linux-alpha@vger.kernel.org, linux-um@lists.infradead.org,
linuxppc-dev@lists.ozlabs.org, linux-m68k@lists.linux-m68k.org,
openrisc@lists.librecores.org, green.hu@gmail.com,
shorne@gmail.com, linux-arm-kernel@lists.infradead.org,
Arnd Bergmann <arnd@kernel.org>,
monstr@monstr.eu, tsbogend@alpha.franken.de,
linux-parisc@vger.kernel.org, nickhu@andestech.com,
jcmvbkbc@gmail.com, linux-api@vger.kernel.org,
linux-kernel@vger.kernel.org, dinguyen@kernel.org,
ebiederm@xmission.com, richard@nod.at, akpm@linux-foundation.org,
Linus Torvalds <torvalds@linux-foundation.org>,
davem@davemloft.net
Subject: Re: [PATCH 09/14] m68k: drop custom __access_ok()
Date: Tue, 15 Feb 2022 07:13:42 +0000 [thread overview]
Message-ID: <YgtSpk0boDjsyjFK@zeniv-ca.linux.org.uk> (raw)
In-Reply-To: <20220215062942.GA12551@lst.de>
On Tue, Feb 15, 2022 at 07:29:42AM +0100, Christoph Hellwig wrote:
> 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).
parisc is also such... How about
select ALTERNATE_SPACE_USERLAND
for that bunch? While we are at it, how many unusual access_ok() instances are
left after this series? arm64, itanic, um, anything else?
FWIW, sparc32 has a slightly unusual instance (see uaccess_32.h there); it's
obviously cheaper than generic and I wonder if the trick is legitimate (and
applicable elsewhere, perhaps)...
next prev parent reply other threads:[~2022-02-15 7:15 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-14 16:34 [PATCH 00/14] clean up asm/uaccess.h, kill set_fs for good Arnd Bergmann
2022-02-14 16:34 ` [PATCH 01/14] uaccess: fix integer overflow on access_ok() Arnd Bergmann
2022-02-14 16:58 ` Christoph Hellwig
2022-02-14 16:34 ` [PATCH 02/14] sparc64: add __{get,put}_kernel_nocheck() Arnd Bergmann
2022-02-14 16:34 ` [PATCH 03/14] nds32: fix access_ok() checks in get/put_user Arnd Bergmann
2022-02-14 17:01 ` Christoph Hellwig
2022-02-14 17:10 ` David Laight
2022-02-15 9:18 ` Arnd Bergmann
2022-02-15 10:25 ` Greg KH
2022-02-14 16:34 ` [PATCH 04/14] x86: use more conventional access_ok() definition Arnd Bergmann
2022-02-14 17:02 ` Christoph Hellwig
2022-02-14 19:45 ` Arnd Bergmann
2022-02-14 20:00 ` Christoph Hellwig
2022-02-14 20:01 ` Linus Torvalds
2022-02-14 20:17 ` Al Viro
2022-02-15 2:47 ` Al Viro
2022-02-14 20:24 ` Linus Torvalds
2022-02-14 22:13 ` David Laight
2022-02-14 16:34 ` [PATCH 05/14] uaccess: add generic __{get,put}_kernel_nofault Arnd Bergmann
2022-02-14 17:02 ` Christoph Hellwig
2022-02-15 0:31 ` Al Viro
2022-02-15 13:16 ` Arnd Bergmann
2022-02-14 16:34 ` [PATCH 06/14] mips: use simpler access_ok() Arnd Bergmann
2022-02-14 16:34 ` [PATCH 07/14] uaccess: generalize access_ok() Arnd Bergmann
2022-02-14 17:04 ` Christoph Hellwig
2022-02-14 17:15 ` Al Viro
2022-02-14 19:25 ` Arnd Bergmann
2022-02-15 10:58 ` Mark Rutland
2022-02-14 16:34 ` [PATCH 08/14] arm64: simplify access_ok() Arnd Bergmann
2022-02-14 21:06 ` Robin Murphy
2022-02-15 8:17 ` Ard Biesheuvel
2022-02-15 9:12 ` Arnd Bergmann
2022-02-15 9:21 ` Ard Biesheuvel
2022-02-15 9:39 ` Arnd Bergmann
2022-02-15 10:39 ` Mark Rutland
2022-02-15 10:37 ` Mark Rutland
2022-02-16 19:43 ` Christophe Leroy
2022-02-15 9:30 ` David Laight
2022-02-15 11:24 ` Mark Rutland
2022-02-15 11:07 ` Mark Rutland
2022-02-14 16:34 ` [PATCH 09/14] m68k: drop custom __access_ok() Arnd Bergmann
2022-02-15 0:37 ` Al Viro
2022-02-15 6:29 ` Christoph Hellwig
2022-02-15 7:13 ` Al Viro [this message]
2022-02-15 10:02 ` Arnd Bergmann
2022-02-15 13:28 ` David Laight
2022-02-14 16:34 ` [PATCH 10/14] uaccess: remove most CONFIG_SET_FS users Arnd Bergmann
2022-02-14 17:06 ` Christoph Hellwig
2022-02-14 19:40 ` Arnd Bergmann
2022-02-14 16:34 ` [PATCH 11/14] sparc64: remove CONFIG_SET_FS support Arnd Bergmann
2022-02-14 17:06 ` Christoph Hellwig
2022-02-16 13:06 ` Arnd Bergmann
2022-02-15 0:48 ` Al Viro
2022-02-16 13:07 ` Arnd Bergmann
2022-02-14 16:34 ` [PATCH 12/14] sh: " Arnd Bergmann
2022-02-14 16:34 ` [PATCH 13/14] ia64: " Arnd Bergmann
2022-02-14 16:34 ` [PATCH 14/14] uaccess: drop set_fs leftovers Arnd Bergmann
2022-02-15 3:03 ` Al Viro
2022-02-15 7:46 ` Helge Deller
2022-02-15 8:10 ` Arnd Bergmann
2022-02-14 17:35 ` [PATCH 00/14] clean up asm/uaccess.h, kill set_fs for good Linus Torvalds
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YgtSpk0boDjsyjFK@zeniv-ca.linux.org.uk \
--to=viro@zeniv.linux.org.uk \
--cc=akpm@linux-foundation.org \
--cc=ardb@kernel.org \
--cc=arnd@arndb.de \
--cc=arnd@kernel.org \
--cc=bcain@codeaurora.org \
--cc=dalias@libc.org \
--cc=davem@davemloft.net \
--cc=deller@gmx.de \
--cc=dinguyen@kernel.org \
--cc=ebiederm@xmission.com \
--cc=geert@linux-m68k.org \
--cc=green.hu@gmail.com \
--cc=guoren@kernel.org \
--cc=hca@linux.ibm.com \
--cc=hch@lst.de \
--cc=jcmvbkbc@gmail.com \
--cc=linux-alpha@vger.kernel.org \
--cc=linux-api@vger.kernel.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-csky@vger.kernel.org \
--cc=linux-hexagon@vger.kernel.org \
--cc=linux-ia64@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-m68k@lists.linux-m68k.org \
--cc=linux-mips@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-parisc@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux-sh@vger.kernel.org \
--cc=linux-snps-arc@lists.infradead.org \
--cc=linux-um@lists.infradead.org \
--cc=linux-xtensa@linux-xtensa.org \
--cc=linux@armlinux.org.uk \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mark.rutland@arm.com \
--cc=mingo@redhat.com \
--cc=monstr@monstr.eu \
--cc=nickhu@andestech.com \
--cc=openrisc@lists.librecores.org \
--cc=peterz@infradead.org \
--cc=richard@nod.at \
--cc=shorne@gmail.com \
--cc=sparclinux@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=tsbogend@alpha.franken.de \
--cc=will@kernel.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).