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| author | Catalin Marinas <catalin.marinas@arm.com> | 2013-07-19 18:08:15 +0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-07-19 18:49:42 +0400 |
| commit | 53ae3acd4390ffeecb3a11dbd5be347b5a3d98f2 (patch) | |
| tree | ddea9b72c31a91d658eee33f54ac602a342b3687 | |
| parent | ad81f0545ef01ea651886dddac4bef6cec930092 (diff) | |
| download | linux-53ae3acd4390ffeecb3a11dbd5be347b5a3d98f2.tar.xz | |
arm64: Only enable local interrupts after the CPU is marked online
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.marinas@arm.com>
Reported-by: Kirill Tkhai <tkhai@yandex.ru>
| -rw-r--r-- | arch/arm64/kernel/smp.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 5d54e3717bf8..9c93e126328c 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -200,13 +200,6 @@ asmlinkage void __cpuinit secondary_start_kernel(void) 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_start_kernel(void) 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); |