[PATCH 3/4] kvm: make printf always compile in debug output

[AlexChen <alex.chen@huawei.com>]

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: AlexChen <alex.chen@huawei.com>
---
 accel/kvm/kvm-all.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index fc6d99a731..854b352346 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -60,14 +60,12 @@
  */
 #define PAGE_SIZE qemu_real_host_page_size

+#ifndef CONFIG_DEBUG_KVM
+#define CONFIG_DEBUG_KVM 0
+#endif

-#ifdef CONFIG_DEBUG_KVM
-#define DPRINTF(fmt, ...) \
-    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
-#else
 #define DPRINTF(fmt, ...) \
-    do { } while (0)
-#endif
+    do { if (CONFIG_DEBUG_KVM) { fprintf(stderr, fmt, ## __VA_ARGS__); } } while (0)

 #define KVM_MSI_HASHTAB_SIZE    256

-- 
2.19.1