From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm64: Fix incorrect per-cpu usage for boot CPU
Date: Thu, 21 Jul 2016 16:02:20 +0100 [thread overview]
Message-ID: <20160721150219.GD16666@e104818-lin.cambridge.arm.com> (raw)
In-Reply-To: <1469095975-976-1-git-send-email-suzuki.poulose@arm.com>
On Thu, Jul 21, 2016 at 11:12:55AM +0100, Suzuki K. Poulose wrote:
> In smp_prepare_boot_cpu(), we invoke cpuinfo_store_boot_cpu to store
> the cpuinfo in a per-cpu ptr, before initialising the per-cpu offset for
> the boot CPU. This patch reorders the sequence to make sure we initialise
> the per-cpu offset before accessing the per-cpu area.
>
> Commit 4b998ff1885eec ("arm64: Delay cpuinfo_store_boot_cpu") fixed the
> issue where we modified the per-cpu area even before the kernel initialises
> the per-cpu areas, but failed to wait until the boot cpu updated it's
> offset.
>
> Fixes: commit 4b998ff1885eec ("arm64: Delay cpuinfo_store_boot_cpu")
> Cc: <stable@vger.kernel.org>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Applied. Thanks.
--
Catalin
prev parent reply other threads:[~2016-07-21 15:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-21 10:12 [PATCH] arm64: Fix incorrect per-cpu usage for boot CPU Suzuki K Poulose
2016-07-21 10:33 ` Mark Rutland
2016-07-21 15:02 ` Catalin Marinas [this message]
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