[IA64] SN: validate smp_affinity mask on intr redirect

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

diff --git a/arch/ia64/kernel/irq.c b/arch/ia64/kernel/irq.c
index ce49c85c928f5fe44f52501c86211b11926c89d8..b4c239685d2eb8f0072d2510573d027ab867d1c3 100644 (file)
--- a/arch/ia64/kernel/irq.c
+++ b/arch/ia64/kernel/irq.c
@@ -104,6 +104,17 @@ void set_irq_affinity_info (unsigned int irq, int hwid, int redir)
                irq_redir[irq] = (char) (redir & 0xff);
        }
 }
+
+bool is_affinity_mask_valid(cpumask_t cpumask)
+{
+       if (ia64_platform_is("sn2")) {
+               /* Only allow one CPU to be specified in the smp_affinity mask */
+               if (cpus_weight(cpumask) != 1)
+                       return false;
+       }
+       return true;
+}
+
 #endif /* CONFIG_SMP */
 
 #ifdef CONFIG_HOTPLUG_CPU