sw64: fix compile errors when CONFIG_KVM=m

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I56OLG

--------------------------------

Export symbol for bind_vcpu_enabled to fix compile errors when
CONFIG_KVM=m.
Signed-off-by: NWang Yuanheng <wangyuanheng@wxiat.com>
Signed-off-by: NGu Zitao <guzitao@wxiat.com>

arch/sw_64/kernel/bindvcpu.c

@@ -11,7 +11,8 @@
 #include <linux/uaccess.h>
 #include <asm/debug.h>
 
-extern bool bind_vcpu_enabled;
+__read_mostly bool bind_vcpu_enabled;
+EXPORT_SYMBOL(bind_vcpu_enabled);
 
 static int __init bind_vcpu_init(void)
 {

arch/sw_64/kvm/kvm-sw64.c

@@ -22,7 +22,7 @@
 bool set_msi_flag;
 unsigned long sw64_kvm_last_vpn[NR_CPUS];
 #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_NUMA)
-__read_mostly bool bind_vcpu_enabled;
+extern bool bind_vcpu_enabled;
 #endif
 #define cpu_last_vpn(cpuid) sw64_kvm_last_vpn[cpuid]