X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=arch%2Fx86%2Fkernel%2Fsmpboot.c;h=c635663b20d9abb0a9557b6b9cc41c28d34c2200;hb=74b84233458e9db7c160cec67638efdbec748ca9;hp=ef53e667e0517fea45cf43da492ca50e1552eced;hpb=a71c8bc5dfefbbf80ef90739791554ef7ea4401b;p=firefly-linux-kernel-4.4.55.git

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index ef53e667e051..c635663b20d9 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -68,6 +68,8 @@
 #include <asm/mwait.h>
 #include <asm/apic.h>
 #include <asm/io_apic.h>
+#include <asm/i387.h>
+#include <asm/fpu-internal.h>
 #include <asm/setup.h>
 #include <asm/uv/uv.h>
 #include <linux/mc146818rtc.h>
@@ -903,6 +905,9 @@ int __cpuinit native_cpu_up(unsigned int cpu, struct task_struct *tidle)
 
 	per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
 
+	/* the FPU context is blank, nobody can own it */
+	__cpu_disable_lazy_restore(cpu);
+
 	err = do_boot_cpu(apicid, cpu, tidle);
 	if (err) {
 		pr_debug("do_boot_cpu failed %d\n", err);