linux-kernel - Re: [PATCH v2] riscv,mmio: Fix readX()-to-delay() ordering

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Message-Id: <169159202110.17533.11320910350713867941.git-patchwork-notify@kernel.org>
Date:   Wed, 09 Aug 2023 14:40:21 +0000
From:   patchwork-bot+linux-riscv@...nel.org
To:     Andrea Parri <parri.andrea@...il.com>
Cc:     linux-riscv@...ts.infradead.org, paul.walmsley@...ive.com,
        palmer@...belt.com, aou@...s.berkeley.edu,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] riscv,mmio: Fix readX()-to-delay() ordering

Hello:

This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer@...osinc.com>:

On Thu,  3 Aug 2023 06:27:38 +0200 you wrote:
> Section 2.1 of the Platform Specification [1] states:
> 
>   Unless otherwise specified by a given I/O device, I/O devices are on
>   ordering channel 0 (i.e., they are point-to-point strongly ordered).
> 
> which is not sufficient to guarantee that a readX() by a hart completes
> before a subsequent delay() on the same hart (cf. memory-barriers.txt,
> "Kernel I/O barrier effects").
> 
> [...]

Here is the summary with links:
  - [v2] riscv,mmio: Fix readX()-to-delay() ordering
    https://git.kernel.org/riscv/c/4eb2eb1b4c0e

You are awesome, thank you!
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