Merge branch 'x86-spinlocks-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / arch / x86 / xen / smp.c

diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 3b52d8075e47b6572accbc0b6dd741d9d403de2f..597655bd72b0b091dad022616c547d90c50d08e0 100644 (file)
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -694,8 +694,15 @@ static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
 static int xen_hvm_cpu_up(unsigned int cpu, struct task_struct *tidle)
 {
        int rc;
-       rc = native_cpu_up(cpu, tidle);
-       WARN_ON (xen_smp_intr_init(cpu));
+       /*
+        * xen_smp_intr_init() needs to run before native_cpu_up()
+        * so that IPI vectors are set up on the booting CPU before
+        * it is marked online in native_cpu_up().
+       */
+       rc = xen_smp_intr_init(cpu);
+       WARN_ON(rc);
+       if (!rc)
+               rc =  native_cpu_up(cpu, tidle);
        return rc;
 }