[XEN PATCH v3 08/12] x86/vpt: address a violation of MISRA C Rule 16.3

[Federico Serafini <federico.serafini@xxxxxxxxxxx>]

Add pseudo keyword fallthrough to meet the requirements to deviate
a violation of MISRA C Rule 16.3 ("An unconditional `break'
statement shall terminate every switch-clause").

No functional change.

Signed-off-by: Federico Serafini <federico.serafini@xxxxxxxxxxx>
---
Changes in v3:
- better indentation of fallthrough.
---
 xen/arch/x86/hvm/vpt.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/vpt.c b/xen/arch/x86/hvm/vpt.c
index e1d6845a28..ab06bea33e 100644
--- a/xen/arch/x86/hvm/vpt.c
+++ b/xen/arch/x86/hvm/vpt.c
@@ -118,9 +118,11 @@ static int pt_irq_masked(struct periodic_time *pt)
             return 0;
 
         gsi = hvm_isa_irq_to_gsi(pt->irq);
+
+        /* Fallthrough to check if the interrupt is masked on the IO APIC. */
+        fallthrough;
     }
 
-    /* Fallthrough to check if the interrupt is masked on the IO APIC. */
     case PTSRC_ioapic:
     {
         int mask = vioapic_get_mask(v->domain, gsi);
-- 
2.34.1