[IA64] SN: Add support for CPU disable

[linux-2.6-omap-h63xx.git] / arch / ia64 / kernel / smpboot.c

diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 62209dcf06d3095fc403b22f3bbff96f95bdec92..308772f7cddc23f9a733c1054f63dd3cf382d7aa 100644 (file)
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -58,6 +58,7 @@
 #include <asm/system.h>
 #include <asm/tlbflush.h>
 #include <asm/unistd.h>
+#include <asm/sn/arch.h>
 
 #define SMP_DEBUG 0
 
@@ -730,6 +731,11 @@ int __cpu_disable(void)
                return (-EBUSY);
        }
 
+       if (ia64_platform_is("sn2")) {
+               if (!sn_cpu_disable_allowed(cpu))
+                       return -EBUSY;
+       }
+
        cpu_clear(cpu, cpu_online_map);
 
        if (migrate_platform_irqs(cpu)) {