From e1f14198307896342f0ae90bedf99e1b0d523b32 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 15 Feb 2011 15:04:07 -0800 Subject: [PATCH] sparc64: Fix NMI startup bug which also breaks perf. Doing NMI startup as an early initcall doesn't work because we need to have SMP started up by then. So we'd only NMI startup one cpu, which causes perf PMU grab to BUG because the nmi_active count isn't what it's supposed to be. This also points out that we don't have proper CPU up/down notifiers for the NMI code which will need to be fixed at some point. Signed-off-by: David S. Miller --- arch/sparc/include/asm/pcr.h | 2 ++ arch/sparc/kernel/pcr.c | 2 -- arch/sparc/kernel/smp_64.c | 2 ++ 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/sparc/include/asm/pcr.h b/arch/sparc/include/asm/pcr.h index a2f5c61f924e1..843e4faf6a507 100644 --- a/arch/sparc/include/asm/pcr.h +++ b/arch/sparc/include/asm/pcr.h @@ -43,4 +43,6 @@ static inline u64 picl_value(unsigned int nmi_hz) extern u64 pcr_enable; +extern int pcr_arch_init(void); + #endif /* __PCR_H */ diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c index ae96cf52a955c..7c2ced612b8f5 100644 --- a/arch/sparc/kernel/pcr.c +++ b/arch/sparc/kernel/pcr.c @@ -167,5 +167,3 @@ out_unregister: unregister_perf_hsvc(); return err; } - -early_initcall(pcr_arch_init); diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c index b6a2b8f47040b..555a76d1f4a18 100644 --- a/arch/sparc/kernel/smp_64.c +++ b/arch/sparc/kernel/smp_64.c @@ -49,6 +49,7 @@ #include #include #include +#include #include "cpumap.h" @@ -1358,6 +1359,7 @@ void __cpu_die(unsigned int cpu) void __init smp_cpus_done(unsigned int max_cpus) { + pcr_arch_init(); } void smp_send_reschedule(int cpu) -- 2.39.5