Add pseudokeyword fallthrough to meet the requirements to deviate
a violation of MISRA C Rul 16.3: "An unconditional `break' statement
shall terminate every switch-clause".

No functional change.

Signed-off-by: Federico Serafini <federico.serafini@bugseng.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Jan Beulich <jbeulich@suse.com>
---
 xen/arch/x86/hvm/vpic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/arch/x86/hvm/vpic.c b/xen/arch/x86/hvm/vpic.c
index 7c3b5c7254..6427b08086 100644
--- a/xen/arch/x86/hvm/vpic.c
+++ b/xen/arch/x86/hvm/vpic.c
@@ -309,6 +309,7 @@ static void vpic_ioport_write(
             if ( !(vpic->init_state & 8) )
                 break; /* CASCADE mode: wait for write to ICW3. */
             /* SNGL mode: fall through (no ICW3). */
+            fallthrough;
         case 2:
             /* ICW3 */
             vpic->init_state++;
-- 
2.34.1