[PATCH] hvc_xen: avoid uninitialized variable warning

[Jan Beulich]

Older compilers don't recognize that "v" can't be used uninitialized;
other code using hvm_get_parameter() zeros the value too, so follow
suit here.

Signed-off-by: Jan Beulich <jbeulich at suse.com>
---
 drivers/tty/hvc/hvc_xen.c         |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

--- 4.1-rc5/drivers/tty/hvc/hvc_xen.c
+++ 4.1-rc5-xen-unint-warnings/drivers/tty/hvc/hvc_xen.c
@@ -302,7 +302,7 @@ static int xen_initial_domain_console_in
 static void xen_console_update_evtchn(struct xencons_info *info)
 {
 	if (xen_hvm_domain()) {
-		uint64_t v;
+		uint64_t v = 0;
 		int err;
 
 		err = hvm_get_parameter(HVM_PARAM_CONSOLE_EVTCHN, &v);