diff options
Diffstat (limited to 'arch/arm/mach-realview/hotplug.c')
| -rw-r--r-- | arch/arm/mach-realview/hotplug.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/arm/mach-realview/hotplug.c b/arch/arm/mach-realview/hotplug.c index e06572e6c490..b6387cfe7044 100644 --- a/arch/arm/mach-realview/hotplug.c +++ b/arch/arm/mach-realview/hotplug.c @@ -53,7 +53,7 @@ static inline void cpu_leave_lowpower(void) : "cc"); } -static inline void platform_do_lowpower(unsigned int cpu) +static inline void platform_do_lowpower(unsigned int cpu, int *spurious) { /* * there is no power-control hardware on this platform, so all @@ -77,16 +77,13 @@ static inline void platform_do_lowpower(unsigned int cpu) } /* - * getting here, means that we have come out of WFI without + * Getting here, means that we have come out of WFI without * having been woken up - this shouldn't happen * - * The trouble is, letting people know about this is not really - * possible, since we are currently running incoherently, and - * therefore cannot safely call printk() or anything else + * Just note it happening - when we're woken, we can report + * its occurrence. */ -#ifdef DEBUG - printk("CPU%u: spurious wakeup call\n", cpu); -#endif + (*spurious)++; } } @@ -102,17 +99,22 @@ int platform_cpu_kill(unsigned int cpu) */ void platform_cpu_die(unsigned int cpu) { + int spurious = 0; + /* * we're ready for shutdown now, so do it */ cpu_enter_lowpower(); - platform_do_lowpower(cpu); + platform_do_lowpower(cpu, &spurious); /* * bring this CPU back into the world of cache * coherency, and then restore interrupts */ cpu_leave_lowpower(); + + if (spurious) + pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious); } int platform_cpu_disable(unsigned int cpu) |
