fix compile error

In non-debug build ASSERT_UNREACHABLE is nop and some compilers will complain that cbm_code/cbm_data may be used uninitialized in function psr_set_l3_cbm. Add return after ASSERT_UNREACHABLE to fix it.

Signed-off-by He Chen <[email protected]>

---
Changes in v2:
Sorry for mistake in first version of this patch.
This is the correct patch.

---
 xen/arch/x86/psr.c | 1 +
 1 file changed, 1 insertion(+)

xen/arch/x86/psr.c +1 -0

index d3dec3a..c5bdfce 100644
@@ -477,6 +477,7 @@ int psr_set_l3_cbm(struct domain *d, unsigned int socket,
 
     default:
         ASSERT_UNREACHABLE();
+        return -EINVAL;
     }
 
     spin_lock(&info->cbm_lock);