From: Christoph Hellwig <hch@lst.de>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Christoph Hellwig <hch@lst.de>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
linux-riscv <linux-riscv@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-arch <linux-arch@vger.kernel.org>,
Russell King <rmk@arm.linux.org.uk>
Subject: Re: remove set_fs for riscv
Date: Mon, 7 Sep 2020 08:03:56 +0200 [thread overview]
Message-ID: <20200907060356.GA18655@lst.de> (raw)
In-Reply-To: <CAK8P3a3BN-Afy4Gj+mGjxiKODUBZwjh+XRbXqQKV-uEhyhOTfA@mail.gmail.com>
On Mon, Sep 07, 2020 at 12:14:59AM +0200, Arnd Bergmann wrote:
> I've had a first pass at this now, see
>
> https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=arm-kill-set_fs
>
> There are a couple of things in there that ended up uglier than I was
> hoping for, and it's completely untested beyond compilation. Is this
> roughly what you had in mind? I can do some testing then and post
> it to the Arm mailing list.
Looks sensible. The OABI hacks a are a little ugly, but so would be
every other alternative.
Note that you don't need to add a TASK_SIZE_MAX definition to arm if you
base it on my series as that provides a default one. I also think with
these changes arm/nommu should be able to use UACCESS_MEMCPY.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch <linux-arch@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Paul Walmsley <paul.walmsley@sifive.com>,
linux-riscv <linux-riscv@lists.infradead.org>,
Christoph Hellwig <hch@lst.de>,
Russell King <rmk@arm.linux.org.uk>
Subject: Re: remove set_fs for riscv
Date: Mon, 7 Sep 2020 08:03:56 +0200 [thread overview]
Message-ID: <20200907060356.GA18655@lst.de> (raw)
In-Reply-To: <CAK8P3a3BN-Afy4Gj+mGjxiKODUBZwjh+XRbXqQKV-uEhyhOTfA@mail.gmail.com>
On Mon, Sep 07, 2020 at 12:14:59AM +0200, Arnd Bergmann wrote:
> I've had a first pass at this now, see
>
> https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=arm-kill-set_fs
>
> There are a couple of things in there that ended up uglier than I was
> hoping for, and it's completely untested beyond compilation. Is this
> roughly what you had in mind? I can do some testing then and post
> it to the Arm mailing list.
Looks sensible. The OABI hacks a are a little ugly, but so would be
every other alternative.
Note that you don't need to add a TASK_SIZE_MAX definition to arm if you
base it on my series as that provides a default one. I also think with
these changes arm/nommu should be able to use UACCESS_MEMCPY.
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next prev parent reply other threads:[~2020-09-07 6:04 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 16:52 remove set_fs for riscv Christoph Hellwig
2020-09-04 16:52 ` Christoph Hellwig
2020-09-04 16:52 ` [PATCH 1/8] maccess: add a generic __{get,put}_kernel_nofault for nommu Christoph Hellwig
2020-09-04 16:52 ` [PATCH 1/8] maccess: add a generic __{get, put}_kernel_nofault " Christoph Hellwig
2020-09-04 16:52 ` [PATCH 2/8] uaccess: provide a generic TASK_SIZE_MAX definition Christoph Hellwig
2020-09-04 16:52 ` Christoph Hellwig
2020-09-04 16:52 ` [PATCH 3/8] asm-generic: fix unaligned access hamdling in raw_copy_{from,to}_user Christoph Hellwig
2020-09-04 16:52 ` [PATCH 3/8] asm-generic: fix unaligned access hamdling in raw_copy_{from, to}_user Christoph Hellwig
2020-09-04 18:04 ` [PATCH 3/8] asm-generic: fix unaligned access hamdling in raw_copy_{from,to}_user Arnd Bergmann
2020-09-04 18:04 ` [PATCH 3/8] asm-generic: fix unaligned access hamdling in raw_copy_{from, to}_user Arnd Bergmann
2020-09-05 7:14 ` [PATCH 3/8] asm-generic: fix unaligned access hamdling in raw_copy_{from,to}_user Christoph Hellwig
2020-09-05 7:14 ` Christoph Hellwig
2020-09-04 18:06 ` Al Viro
2020-09-04 18:06 ` Al Viro
2020-09-04 22:35 ` Al Viro
2020-09-04 22:35 ` Al Viro
2020-09-05 14:41 ` Al Viro
2020-09-05 14:41 ` Al Viro
2020-09-07 8:07 ` Arnd Bergmann
2020-09-07 8:07 ` [PATCH 3/8] asm-generic: fix unaligned access hamdling in raw_copy_{from, to}_user Arnd Bergmann
2020-09-07 19:00 ` Sean Anderson
2020-09-07 19:00 ` Sean Anderson
2020-09-04 16:52 ` [PATCH 4/8] asm-generic: prepare uaccess.h for a set_fs-less world Christoph Hellwig
2020-09-04 16:52 ` Christoph Hellwig
2020-09-04 16:52 ` [PATCH 5/8] riscv: use memcpy based uaccess for nommu again Christoph Hellwig
2020-09-04 16:52 ` Christoph Hellwig
2020-09-04 16:52 ` [PATCH 6/8] riscv: refactor __get_user and __put_user Christoph Hellwig
2020-09-04 16:52 ` Christoph Hellwig
2020-09-04 16:52 ` [PATCH 7/8] riscv: implement __get_kernel_nofault and __put_user_nofault Christoph Hellwig
2020-09-04 16:52 ` Christoph Hellwig
2020-09-04 16:52 ` [PATCH 8/8] riscv: remove address space overrides using set_fs() Christoph Hellwig
2020-09-04 16:52 ` Christoph Hellwig
2020-09-04 18:15 ` remove set_fs for riscv Arnd Bergmann
2020-09-04 18:15 ` Arnd Bergmann
2020-09-05 7:17 ` Christoph Hellwig
2020-09-05 7:17 ` Christoph Hellwig
2020-09-05 12:17 ` Arnd Bergmann
2020-09-05 12:17 ` Arnd Bergmann
2020-09-06 22:14 ` Arnd Bergmann
2020-09-06 22:14 ` Arnd Bergmann
2020-09-07 6:03 ` Christoph Hellwig [this message]
2020-09-07 6:03 ` Christoph Hellwig
2020-09-07 14:58 ` Arnd Bergmann
2020-09-07 14:58 ` Arnd Bergmann
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