From: Benjamin Herrenschmidt Date: Fri, 11 May 2007 05:22:45 +0000 (-0700) Subject: powerpc: fixup hard_irq_disable semantics X-Git-Tag: accepted/tizen/common/20141203.182822~31063 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e1fa2e136ff64a3814a98c03d46320b9e80d29c8;p=platform%2Fkernel%2Flinux-arm64.git powerpc: fixup hard_irq_disable semantics This patch renames the raw hard_irq_{enable,disable} into __hard_irq_{enable,disable} and introduces a higher level hard_irq_disable() function that can be used by any code to enforce that IRQs are fully disabled, not only lazy disabled. The difference with the __ versions is that it will update some per-processor fields so that the kernel keeps track and properly re-enables them in the next local_irq_disable(); This prepares powerpc for my next patch that introduces hard_irq_disable() generically. Signed-off-by: Benjamin Herrenschmidt Cc: Rusty Russell Cc: Paul Mackerras Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 9ed4931..068377a 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -173,7 +173,7 @@ void local_irq_restore(unsigned long en) lv1_get_version_info(&tmp); } - hard_irq_enable(); + __hard_irq_enable(); } #endif /* CONFIG_PPC64 */ diff --git a/arch/powerpc/kernel/swsusp.c b/arch/powerpc/kernel/swsusp.c index 064a7ba..77b7b34 100644 --- a/arch/powerpc/kernel/swsusp.c +++ b/arch/powerpc/kernel/swsusp.c @@ -36,8 +36,4 @@ void restore_processor_state(void) #ifdef CONFIG_PPC32 set_context(current->active_mm->context.id, current->active_mm->pgd); #endif - -#ifdef CONFIG_PPC64 - hard_irq_enable(); -#endif } diff --git a/arch/powerpc/platforms/cell/pervasive.c b/arch/powerpc/platforms/cell/pervasive.c index 8c20f0f..812bf56 100644 --- a/arch/powerpc/platforms/cell/pervasive.c +++ b/arch/powerpc/platforms/cell/pervasive.c @@ -43,12 +43,10 @@ static void cbe_power_save(void) unsigned long ctrl, thread_switch_control; /* - * We need to hard disable interrupts, but we also need to mark them - * hard disabled in the PACA so that the local_irq_enable() done by - * our caller upon return propertly hard enables. + * We need to hard disable interrupts, the local_irq_enable() done by + * our caller upon return will hard re-enable. */ hard_irq_disable(); - get_paca()->hard_enabled = 0; ctrl = mfspr(SPRN_CTRLF); diff --git a/include/asm-powerpc/hw_irq.h b/include/asm-powerpc/hw_irq.h index 9e4dd98..a7b60bf 100644 --- a/include/asm-powerpc/hw_irq.h +++ b/include/asm-powerpc/hw_irq.h @@ -48,8 +48,15 @@ extern void iseries_handle_interrupts(void); #define irqs_disabled() (local_get_flags() == 0) -#define hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1) -#define hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1) +#define __hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1) +#define __hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1) + +#define hard_irq_disable() \ + do { \ + __hard_irq_disable(); \ + get_paca()->soft_enabled = 0; \ + get_paca()->hard_enabled = 0; \ + } while(0) #else