hvc_xen: avoid uninitialized variable warning

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@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
(cherry picked from commit c4ace5daf4ff726402b13f1ababf2ad0e0ceec65)
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>

diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index 7a3d146a5f0efc0dbc3b94e854adb4d81c85da4d..a9d837f83ce832539a442643f10ec4221d0fa117 100644 (file)
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -302,7 +302,7 @@ static int xen_initial_domain_console_init(void)
 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);