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

patchwork-bot+linux-riscv at kernel.org patchwork-bot+linux-riscv at kernel.org
Wed Aug 9 07:40:21 PDT 2023


Hello:

This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer at rivosinc.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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