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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-17 09:14:21 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-17 09:14:21 -0700 |
| commit | 32535bd5637d3152f944f124bcc82d498892ba1b (patch) | |
| tree | 99d33b58cfec44f4cf95fad5efa75aea0dd7d60b /arch/powerpc/kernel/irq.c | |
| parent | 0b623f871d7c993fac8ad7aaaa8f5f3cdb8ed480 (diff) | |
| parent | 3a36dd068f4308461661d28e8e14e11e426eba6b (diff) | |
Merge branch 'v3.5-for-usb' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into usb-next
Diffstat (limited to 'arch/powerpc/kernel/irq.c')
| -rw-r--r-- | arch/powerpc/kernel/irq.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 43eb74fcedd..641da9e868c 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -229,6 +229,19 @@ notrace void arch_local_irq_restore(unsigned long en) */ if (unlikely(irq_happened != PACA_IRQ_HARD_DIS)) __hard_irq_disable(); +#ifdef CONFIG_TRACE_IRQFLAG + else { + /* + * We should already be hard disabled here. We had bugs + * where that wasn't the case so let's dbl check it and + * warn if we are wrong. Only do that when IRQ tracing + * is enabled as mfmsr() can be costly. + */ + if (WARN_ON(mfmsr() & MSR_EE)) + __hard_irq_disable(); + } +#endif /* CONFIG_TRACE_IRQFLAG */ + set_soft_enabled(0); /* @@ -260,11 +273,17 @@ EXPORT_SYMBOL(arch_local_irq_restore); * if they are currently disabled. This is typically called before * schedule() or do_signal() when returning to userspace. We do it * in C to avoid the burden of dealing with lockdep etc... + * + * NOTE: This is called with interrupts hard disabled but not marked + * as such in paca->irq_happened, so we need to resync this. */ void restore_interrupts(void) { - if (irqs_disabled()) + if (irqs_disabled()) { + local_paca->irq_happened |= PACA_IRQ_HARD_DIS; local_irq_enable(); + } else + __hard_irq_enable(); } #endif /* CONFIG_PPC64 */ |