linux-kernel - Re: [PATCH V2] riscv: Fixup race condition on PG_dcache_clean in flush_icache

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Message-Id: <167598585275.27143.16666537067061607902.b4-ty@rivosinc.com>
Date:   Thu, 09 Feb 2023 15:37:32 -0800
From:   Palmer Dabbelt <palmer@...osinc.com>
To:     Arnd Bergmann <arnd@...db.de>,
        Conor Dooley <conor.dooley@...rochip.com>,
        apatel@...tanamicro.com, atishp@...shpatra.org,
        Mark Rutland <mark.rutland@....com>, bjorn@...nel.org,
        tongtiangen@...wei.com, ajones@...tanamicro.com,
        Andrew Waterman <andrew@...ive.com>, guoren@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        Guo Ren <guoren@...nel.org>
Subject: Re: [PATCH V2] riscv: Fixup race condition on PG_dcache_clean in
 flush_icache_pte


On Thu, 26 Jan 2023 22:53:06 -0500, guoren@...nel.org wrote:
> In commit 588a513d3425 ("arm64: Fix race condition on PG_dcache_clean
> in __sync_icache_dcache()"), we found RISC-V has the same issue as the
> previous arm64. The previous implementation didn't guarantee the correct
> sequence of operations, which means flush_icache_all() hasn't been
> called when the PG_dcache_clean was set. That would cause a risk of page
> synchronization.
> 
> [...]

Applied, thanks!

[1/1] riscv: Fixup race condition on PG_dcache_clean in flush_icache_pte
      https://git.kernel.org/palmer/c/950b879b7f02

Best regards,
-- 
Palmer Dabbelt <palmer@...osinc.com>