From d6d048192b1d22cb8f09da0cc936095ec2cb969c Mon Sep 17 00:00:00 2001 From: Daniel Hellstrom Date: Mon, 2 May 2011 00:08:51 +0000 Subject: sparc32: implement SMP IPIs using the generic functions The current sparc32 SMP IPI generation is implemented the cross call function. The cross call function uses IRQ15 the NMI, this is has the effect that IPIs will interrupt IRQ critical areas and hang the system. Typically on/after spin_lock_irqsave calls can be aborted. The cross call functionality must still exist to flush cache/TLBS. This patch provides CPU models a custom way to implement generation of IPIs on the generic code's request. The typical approach is to generate an IRQ for each IPI case. After this patch each sparc32 SMP CPU model needs to implement IPIs in order to function properly. Signed-off-by: Daniel Hellstrom Signed-off-by: David S. Miller --- arch/sparc/include/asm/cpudata_32.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/sparc/include/asm/cpudata_32.h') diff --git a/arch/sparc/include/asm/cpudata_32.h b/arch/sparc/include/asm/cpudata_32.h index 31d48a0..a4c5a93 100644 --- a/arch/sparc/include/asm/cpudata_32.h +++ b/arch/sparc/include/asm/cpudata_32.h @@ -16,6 +16,10 @@ typedef struct { unsigned long clock_tick; unsigned int multiplier; unsigned int counter; +#ifdef CONFIG_SMP + unsigned int irq_resched_count; + unsigned int irq_call_count; +#endif int prom_node; int mid; int next; @@ -23,5 +27,6 @@ typedef struct { DECLARE_PER_CPU(cpuinfo_sparc, __cpu_data); #define cpu_data(__cpu) per_cpu(__cpu_data, (__cpu)) +#define local_cpu_data() __get_cpu_var(__cpu_data) #endif /* _SPARC_CPUDATA_H */ -- cgit v1.1