s390x/kvm: make printf always compile in debug output

Wrapped printf calls inside debug macros (DPRINTF) in `if` statement.
This will ensure that printf function will always compile even if debug
output is turned off and, in turn, will prevent bitrot of the format
strings.

Signed-off-by: Danil Antonov <g.danil.anto@gmail.com>
Message-Id: <CA+KKJYAhsuTodm3s2rK65hR=-Xi5+Z7Q+M2nJYZQf2wa44HfOg@mail.gmail.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index ac47154b8351678b36a6fa644bd2c6a22aa4ffe2..1a249d8359f010d0a6c6972702ddf129c15a12c5 100644 (file)
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -47,16 +47,16 @@
 #include "exec/memattrs.h"
 #include "hw/s390x/s390-virtio-ccw.h"
 
-/* #define DEBUG_KVM */
-
-#ifdef DEBUG_KVM
-#define DPRINTF(fmt, ...) \
-    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
-#else
-#define DPRINTF(fmt, ...) \
-    do { } while (0)
+#ifndef DEBUG_KVM
+#define DEBUG_KVM  0
 #endif
 
+#define DPRINTF(fmt, ...) do {                \
+    if (DEBUG_KVM) {                          \
+        fprintf(stderr, fmt, ## __VA_ARGS__); \
+    }                                         \
+} while (0);
+
 #define kvm_vm_check_mem_attr(s, attr) \
     kvm_vm_check_attr(s, KVM_S390_VM_MEM_CTRL, attr)