[PATCH] x86/HVM: shrink (pack) struct periodic_time

[Jan Beulich <jbeulich@xxxxxxxx>]

Except for warned_timeout_too_short, which is used with
test_and_set_bool(), the booleans there don't need to occupy entire bytes.
With them converted to bitfields, pending_intr_nr can move up into the
vacated 4-byte slot.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/include/asm/hvm/vpt.h
+++ b/xen/arch/x86/include/asm/hvm/vpt.h
@@ -21,19 +21,19 @@ typedef void time_cb(struct vcpu *v, voi
 
 struct periodic_time {
     struct list_head list;
-    bool on_list;
-    bool one_shot;
-    bool do_not_freeze;
-    bool irq_issued;
+    bool on_list:1;
+    bool one_shot:1;
+    bool do_not_freeze:1;
+    bool irq_issued:1;
+    bool level:1;
     bool warned_timeout_too_short;
-    bool level;
 #define PTSRC_isa    1 /* ISA time source */
 #define PTSRC_lapic  2 /* LAPIC time source */
 #define PTSRC_ioapic 3 /* IOAPIC time source */
     u8 source;                  /* PTSRC_ */
     u8 irq;
+    uint32_t pending_intr_nr;   /* pending timer interrupts */
     struct vcpu *vcpu;          /* vcpu timer interrupt delivers to */
-    u32 pending_intr_nr;        /* pending timer interrupts */
     uint64_t generation;        /* distinguish two armings of the same timer */
     u64 period;                 /* frequency in ns */
     s_time_t scheduled;         /* scheduled timer interrupt */