From mboxrd@z Thu Jan 1 00:00:00 1970 From: suzuki.poulose@arm.com (Suzuki K Poulose) Date: Tue, 10 May 2016 11:14:41 +0100 Subject: [PATCH] arm64: secondary_start_kernel: Remove unnecessary barrier Message-ID: <1462875281-5063-1-git-send-email-suzuki.poulose@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Remove the unnecessary smp_wmb(), which was added to make sure that the update_cpu_boot_status() completes before we mark the CPU online. But update_cpu_boot_status() already has dsb() (required for the failing CPUs) to ensure the correct behavior. Cc: Will Deacon Cc: Mark Rutland Cc: Dennis Chen Cc: Catalin Marinas Signed-off-by: Suzuki K Poulose --- arch/arm64/kernel/smp.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index b2d5f4e..ec040a8 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -225,8 +225,6 @@ asmlinkage void secondary_start_kernel(void) pr_info("CPU%u: Booted secondary processor [%08x]\n", cpu, read_cpuid_id()); update_cpu_boot_status(CPU_BOOT_SUCCESS); - /* Make sure the status update is visible before we complete */ - smp_wmb(); set_cpu_online(cpu, true); complete(&cpu_running); -- 1.7.9.5