[XEN PATCH 09/11] x86/xstate: moved BUILD_BUG_ON to address MISRA C:2012 Rule 2.1

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

Variable declarations between a switch statement guard and before
any case label are unreachable code, and hence violate Rule 2.1:
"A project shall not contain unreachable code".

Therefore the variable declarations are moved in the smallest enclosing
scope, near other variable definitions.

Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
---
 xen/arch/x86/xstate.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/xstate.c b/xen/arch/x86/xstate.c
index 92496f3795..cb2b9e720c 100644
--- a/xen/arch/x86/xstate.c
+++ b/xen/arch/x86/xstate.c
@@ -396,9 +396,10 @@ void xrstor(struct vcpu *v, uint64_t mask)
      */
     for ( prev_faults = faults = 0; ; prev_faults = faults )
     {
+        BUILD_BUG_ON(sizeof(faults) != 4); /* Clang doesn't support %z in asm. 
*/
+
         switch ( __builtin_expect(ptr->fpu_sse.x[FPU_WORD_SIZE_OFFSET], 8) )
         {
-            BUILD_BUG_ON(sizeof(faults) != 4); /* Clang doesn't support %z in 
asm. */
 #define _xrstor(insn) \
         asm volatile ( "1: .byte " insn "\n" \
                        "3:\n" \
-- 
2.34.1