From:   Will Deacon <will@kernel.org>
To:     anshuman.khandual@arm.com, catalin.marinas@arm.com,
        Jianyong Wu <jianyong.wu@arm.com>, akpm@linux-foundation.org
Cc:     kernel-team@android.com, Will Deacon <will@kernel.org>,
        linux-arm-kernel@lists.infradead.org, gshan@redhat.com,
        david@redhat.com, justin.he@arm.com, ardb@kernel.org, nd@arm.com,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] arm64/mm: avoid fixmap race condition when create pud mapping
Date:   Mon, 13 Dec 2021 16:42:44 +0000
Message-Id: <163941094777.2464379.2692109101400876104.b4-ty@kernel.org>
In-Reply-To: <20211210095432.51798-1-jianyong.wu@arm.com>
References: <20211210095432.51798-1-jianyong.wu@arm.com>
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On Fri, 10 Dec 2021 17:54:32 +0800, Jianyong Wu wrote:
> fixmap is a global resource and is used recursively in create pud mapping.
> It may lead to race condition when alloc_init_pud is called concurrently.
> 
> Fox example:
> alloc_init_pud is called when kernel_init. If memory hotplug
> thread, which will also call alloc_init_pud, happens during
> kernel_init, the race for fixmap occurs.
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64/mm: avoid fixmap race condition when create pud mapping
      https://git.kernel.org/arm64/c/a6a6b9aa34e5

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev