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/Kconfig | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'arch/sparc/Kconfig') diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index a56630d4f14b..63a027c9ada5 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -28,7 +28,7 @@ config SPARC select HAVE_GENERIC_HARDIRQS select GENERIC_HARDIRQS_NO_DEPRECATED select GENERIC_IRQ_SHOW - + select USE_GENERIC_SMP_HELPERS if SMP config SPARC32 def_bool !64BIT @@ -47,7 +47,6 @@ config SPARC64 select HAVE_DYNAMIC_FTRACE select HAVE_FTRACE_MCOUNT_RECORD select HAVE_SYSCALL_TRACEPOINTS - select USE_GENERIC_SMP_HELPERS if SMP select RTC_DRV_CMOS select RTC_DRV_BQ4802 select RTC_DRV_SUN4V -- cgit v1.2.2