3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Catalin Marinas <catalin.mari...@arm.com>
commit 53ae3acd4390ffeecb3a11dbd5be347b5a3d98f2 upstream.
There is a slight chance that (timer) interrupts are triggered before a
secondary CPU has been marked online with implications on softirq thread
affinity.
Signed-off-by: Catalin Marinas <catalin.mari...@arm.com>
Reported-by: Kirill Tkhai <tk...@yandex.ru>
Cc: Mark Brown <broo...@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/arm64/kernel/smp.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -200,13 +200,6 @@ asmlinkage void __cpuinit secondary_star
raw_spin_unlock(&boot_lock);
/*
- * Enable local interrupts.
- */
- notify_cpu_starting(cpu);
- local_irq_enable();
- local_fiq_enable();
-
- /*
* OK, now it's safe to let the boot CPU continue. Wait for
* the CPU migration code to notice that the CPU is online
* before we continue.
@@ -215,6 +208,14 @@ asmlinkage void __cpuinit secondary_star
complete(&cpu_running);
/*
+ * Enable GIC and timers.
+ */
+ notify_cpu_starting(cpu);
+
+ local_irq_enable();
+ local_fiq_enable();
+
+ /*
* OK, it's off to the idle thread for us
*/
cpu_startup_entry(CPUHP_ONLINE);
--
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