Re: [PATCH 8/9] RISC-V: User-facing API

From	Christoph Hellwig <hch@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 8/9] RISC-V: User-facing API
Date	2017-07-11 16:00 +0200
Message-ID	<u23RO-31D-75@gated-at.bofh.it> (permalink)
References	<u0hcu-7dv-23@gated-at.bofh.it> <u1NjX-1cd-9@gated-at.bofh.it> <u23oJ-2Qv-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, Jul 11, 2017 at 02:22:15PM +0100, Will Deacon wrote:
> The problem is that by supporting these hypothetical designs that can't do
> atomics, you hurt sensible designs that *can* do the atomics because you
> force them to take an additional indirection that could otherwise be
> avoided.

Agreed.  But the new patchset seems to remove it already, so I guess
we're fine on the kernel side.  Now we just need to make sure the
glibc API doesn't use any indirections.

Note that it might make sense to emit these for very low end nommu
designs.  Maybe even running Linux, but in that case they'll just need
a special non-standard ABI for very limited use cases.

Thread

RISC-V Linux Port v4 Palmer Dabbelt <palmer@dabbelt.com> - 2017-07-04 22:00 +0200
  Re: [patches] Re: [PATCH 1/9] RISC-V: Init and Halt Code Karsten Merker <merker@debian.org> - 2017-07-04 23:20 +0200
    Re: [patches] Re: [PATCH 1/9] RISC-V: Init and Halt Code Thomas Gleixner <tglx@linutronix.de> - 2017-07-05 08:50 +0200
  Re: [patches] [PATCH 1/9] RISC-V: Init and Halt Code Jonathan Neuschäfer <j.neuschaefer@gmx.net> - 2017-07-05 00:00 +0200
    Re: [patches] [PATCH 1/9] RISC-V: Init and Halt Code Palmer Dabbelt <palmer@dabbelt.com> - 2017-07-07 00:40 +0200
      Re: [patches] [PATCH 1/9] RISC-V: Init and Halt Code Jonathan Neuschäfer <j.neuschaefer@gmx.net> - 2017-07-07 15:10 +0200
        Re: [patches] [PATCH 1/9] RISC-V: Init and Halt Code Palmer Dabbelt <palmer@dabbelt.com> - 2017-07-10 22:50 +0200
  Re: [PATCH 2/9] RISC-V: Atomic and Locking Code Peter Zijlstra <peterz@infradead.org> - 2017-07-05 10:50 +0200
    Re: [PATCH 2/9] RISC-V: Atomic and Locking Code Boqun Feng <boqun.feng@gmail.com> - 2017-07-06 06:20 +0200
      Re: [PATCH 2/9] RISC-V: Atomic and Locking Code Peter Zijlstra <peterz@infradead.org> - 2017-07-06 09:30 +0200
    Re: [PATCH 2/9] RISC-V: Atomic and Locking Code Palmer Dabbelt <palmer@dabbelt.com> - 2017-07-07 03:10 +0200
      Re: [PATCH 2/9] RISC-V: Atomic and Locking Code Boqun Feng <boqun.feng@gmail.com> - 2017-07-07 04:20 +0200
        Re: [PATCH 2/9] RISC-V: Atomic and Locking Code Palmer Dabbelt <palmer@dabbelt.com> - 2017-07-10 22:40 +0200
      Re: [PATCH 2/9] RISC-V: Atomic and Locking Code Peter Zijlstra <peterz@infradead.org> - 2017-07-07 10:10 +0200
        Re: [PATCH 2/9] RISC-V: Atomic and Locking Code Palmer Dabbelt <palmer@dabbelt.com> - 2017-07-10 22:40 +0200
  Re: [PATCH 8/9] RISC-V: User-facing API James Hogan <james.hogan@imgtec.com> - 2017-07-05 12:30 +0200
  Re: [PATCH 8/9] RISC-V: User-facing API Christoph Hellwig <hch@infradead.org> - 2017-07-06 04:10 +0200
    Re: [PATCH 8/9] RISC-V: User-facing API Will Deacon <will.deacon@arm.com> - 2017-07-06 11:00 +0200
      Re: [PATCH 8/9] RISC-V: User-facing API Christoph Hellwig <hch@infradead.org> - 2017-07-06 17:40 +0200
        Re: [PATCH 8/9] RISC-V: User-facing API Will Deacon <will.deacon@arm.com> - 2017-07-06 17:50 +0200
          Re: [PATCH 8/9] RISC-V: User-facing API Will Deacon <will.deacon@arm.com> - 2017-07-11 15:30 +0200
            Re: [PATCH 8/9] RISC-V: User-facing API Christoph Hellwig <hch@infradead.org> - 2017-07-11 16:00 +0200
              Re: [PATCH 8/9] RISC-V: User-facing API Palmer Dabbelt <palmer@dabbelt.com> - 2017-07-11 19:30 +0200
            Re: [PATCH 8/9] RISC-V: User-facing API Palmer Dabbelt <palmer@dabbelt.com> - 2017-07-11 19:10 +0200
  Re: [PATCH 2/9] RISC-V: Atomic and Locking Code Boqun Feng <boqun.feng@gmail.com> - 2017-07-06 05:40 +0200
  Re: [PATCH 8/9] RISC-V: User-facing API Dave P Martin <Dave.Martin@arm.com> - 2017-07-06 17:40 +0200
  Re: [patches] [PATCH 2/9] RISC-V: Atomic and Locking Code Jonathan Neuschäfer <j.neuschaefer@gmx.net> - 2017-07-07 15:20 +0200
    Re: [patches] [PATCH 2/9] RISC-V: Atomic and Locking Code Palmer Dabbelt <palmer@dabbelt.com> - 2017-07-10 22:50 +0200

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