[kvm-unit-tests PATCH v2 4/6] s390x: fix compile of interrupt.c

[Nico Boehr <nrb@linux.ibm.com>]

A future commit will include interrupt.h from sie.c.

Since interrupt.h includes mem.h, but sie.c does not include facility.h,
this will lead to the following compile error:

In file included from lib/s390x/interrupt.c:10:
/home/nrb/kvm-unit-tests/lib/asm/mem.h: In function ‘set_storage_key_mb’:
/home/nrb/kvm-unit-tests/lib/asm/mem.h:42:16: error: implicit declaration of function ‘test_facility’ [-Werror=implicit-function-declaration]
   42 |         assert(test_facility(8));
         |                ^~~~~~~~~~~~~

Add the missing include in interrupt.h

Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
---
 lib/s390x/asm/mem.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/s390x/asm/mem.h b/lib/s390x/asm/mem.h
index 64ef59b546a4..94d58c34f53f 100644
--- a/lib/s390x/asm/mem.h
+++ b/lib/s390x/asm/mem.h
@@ -8,6 +8,7 @@
 #ifndef _ASMS390X_MEM_H_
 #define _ASMS390X_MEM_H_
 #include <asm/arch_def.h>
+#include <asm/facility.h>
 
 /* create pointer while avoiding compiler warnings */
 #define OPAQUE_PTR(x) ((void *)(((uint64_t)&lowcore) + (x)))
-- 
2.39.1