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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-01 08:57:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-01 08:57:02 -0700 |
| commit | ccd00d1091fa7fff151127f26f6900be2ac8cc10 (patch) | |
| tree | 2fdd334f5cef98018557d94a69d9432e4f8005e2 /arch/powerpc/kernel/time.c | |
| parent | afdef69c7ff7d0bf59e3cafc187aefb12878dbe3 (diff) | |
| parent | c0bb9e45f3a7f67fc358946727bc3d5f23d0f55d (diff) | |
| download | kernel_samsung_crespo-ccd00d1091fa7fff151127f26f6900be2ac8cc10.zip kernel_samsung_crespo-ccd00d1091fa7fff151127f26f6900be2ac8cc10.tar.gz kernel_samsung_crespo-ccd00d1091fa7fff151127f26f6900be2ac8cc10.tar.bz2 | |
Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
kdump: Allow shrinking of kdump region to be overridden
powerpc/pmac/smp: Remove no-longer needed preempt workaround
powerpc/smp: Increase vdso_data->processorCount, not just decrease it
powerpc/smp: Create idle threads on demand and properly reset them
powerpc/smp: Don't expose per-cpu "cpu_state" array
powerpc/pmac/smp: Fix CPU hotplug crashes on some machines
powerpc/smp: Add a smp_ops->bringup_up() done callback
powerpc/pmac: Rename cpu_state in therm_pm72 to avoid collision
powerpc/pmac/smp: Properly NAP offlined CPU on G5
powerpc/pmac/smp: Remove HMT changes for PowerMac offline code
powerpc/pmac/smp: Consolidate 32-bit and 64-bit PowerMac cpu_die in one file
powerpc/pmac/smp: Fixup smp_core99_cpu_disable() and use it on 64-bit
powerpc/pmac/smp: Rename fixup_irqs() to migrate_irqs() and use it on ppc32
powerpc/pmac/smp: Fix 32-bit PowerMac cpu_die
powerpc/smp: Remove unused smp_ops->cpu_enable()
powerpc/smp: Remove unused generic_cpu_enable()
powerpc/smp: Fix generic_mach_cpu_die()
powerpc/smp: soft-replugged CPUs must go back to start_secondary
powerpc: Make decrementer interrupt robust against offlined CPUs
Diffstat (limited to 'arch/powerpc/kernel/time.c')
| -rw-r--r-- | arch/powerpc/kernel/time.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index aa92696..375480c 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -577,14 +577,21 @@ void timer_interrupt(struct pt_regs * regs) struct clock_event_device *evt = &decrementer->event; u64 now; + /* Ensure a positive value is written to the decrementer, or else + * some CPUs will continue to take decrementer exceptions. + */ + set_dec(DECREMENTER_MAX); + + /* Some implementations of hotplug will get timer interrupts while + * offline, just ignore these + */ + if (!cpu_online(smp_processor_id())) + return; + trace_timer_interrupt_entry(regs); __get_cpu_var(irq_stat).timer_irqs++; - /* Ensure a positive value is written to the decrementer, or else - * some CPUs will continuue to take decrementer exceptions */ - set_dec(DECREMENTER_MAX); - #if defined(CONFIG_PPC32) && defined(CONFIG_PMAC) if (atomic_read(&ppc_n_lost_interrupts) != 0) do_IRQ(regs); |