Re: [PATCH] arm64: Fix incorrect per-cpu usage for boot CPU

From	Catalin Marinas <catalin.marinas@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] arm64: Fix incorrect per-cpu usage for boot CPU
Date	2016-07-21 17:10 +0200
Message-ID	<rXnLP-DS-3@gated-at.bofh.it> (permalink)
References	<rXjfb-67q-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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

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[PATCH] arm64: Fix incorrect per-cpu usage for boot CPU Suzuki K Poulose <suzuki.poulose@arm.com> - 2016-07-21 12:20 +0200
  Re: [PATCH] arm64: Fix incorrect per-cpu usage for boot CPU Mark Rutland <mark.rutland@arm.com> - 2016-07-21 12:40 +0200
  Re: [PATCH] arm64: Fix incorrect per-cpu usage for boot CPU Catalin Marinas <catalin.marinas@arm.com> - 2016-07-21 17:10 +0200

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