Re: [PATCH 0/2] riscv: Fix race conditions in PR_RISCV_SET_ICACHE_FLUSH_CTX

patchwork-bot+linux-riscv
2024-09-11T15:55:17Z

Hello:

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

On Tue, 13 Aug 2024 16:02:16 -0700 you wrote:
> There are two race conditions possible with
> PR_RISCV_SET_ICACHE_FLUSH_CTX. The first one can be seen by enabling
> DEBUG_PREEMPT and using this prctl which will warn with BUG: using
> smp_processor_id() in preemptible. This can be fixed by disabling
> preemption during this prctl handling. Another race condition is present
> when the mm->context.icache_stale_mask is changed by a thread while a
> different thread in the same mm context is between switch_mm() and
> switch_to() during a context switch.
>
> [...]

Here is the summary with links:
- [1/2] riscv: Disable preemption while handling PR_RISCV_CTX_SW_FENCEI_OFF
https://git.kernel.org/riscv/c/7c1e5b9690b0
- [2/2] riscv: Eagerly flush in flush_icache_deferred()
(no matching commit)

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