... and hence wants to be of bool type.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
---
v2: New.

--- a/xen/arch/x86/hvm/rtc.c
+++ b/xen/arch/x86/hvm/rtc.c
@@ -186,7 +186,7 @@ static void check_update_timer(RTCState
     if (!(s->hw.cmos_data[RTC_REG_C] & RTC_UF) &&
             !(s->hw.cmos_data[RTC_REG_B] & RTC_SET))
     {
-        s->use_timer = 1;
+        s->use_timer = true;
         guest_usec = get_localtime_us(d) % USEC_PER_SEC;
         if (guest_usec >= (USEC_PER_SEC - 244))
         {
@@ -214,7 +214,7 @@ static void check_update_timer(RTCState
         }
     }
     else
-        s->use_timer = 0;
+        s->use_timer = false;
 }
 
 static void cf_check rtc_update_timer(void *opaque)
@@ -673,7 +673,7 @@ static uint32_t rtc_ioport_read(RTCState
         break;
     case RTC_REG_A:
         ret = s->hw.cmos_data[s->hw.cmos_index];
-        if ((s->use_timer == 0) && update_in_progress(s))
+        if ( !s->use_timer && update_in_progress(s) )
             ret |= RTC_UIP;
         break;
     case RTC_REG_C:
--- a/xen/arch/x86/include/asm/hvm/vpt.h
+++ b/xen/arch/x86/include/asm/hvm/vpt.h
@@ -106,7 +106,9 @@ typedef struct RTCState {
     s_time_t check_ticks_since;
     int period;
     uint8_t pt_dead_ticks;
-    uint32_t use_timer;
+
+    bool use_timer;
+
     spinlock_t lock;
 } RTCState;