From mboxrd@z Thu Jan 1 00:00:00 1970 From: catalin.marinas@arm.com (Catalin Marinas) Date: Thu, 21 Jul 2016 16:02:20 +0100 Subject: [PATCH] arm64: Fix incorrect per-cpu usage for boot CPU In-Reply-To: <1469095975-976-1-git-send-email-suzuki.poulose@arm.com> References: <1469095975-976-1-git-send-email-suzuki.poulose@arm.com> Message-ID: <20160721150219.GD16666@e104818-lin.cambridge.arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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: > Cc: Will Deacon > Cc: Catalin Marinas > Signed-off-by: Suzuki K Poulose Applied. Thanks. -- Catalin