[PATCH] lockable.h: always define unknown_lock_type

[mingli.yu]

From: Mingli Yu <mingli.yu@windriver.com>

There comes below build failure when use gcc 10.1.0 and
"-Og" passed to compiler.
 | 
/usr/lib/gcc/x86_64-wrs-linux/10.1.0/../../../../x86_64-wrs-linux/bin/ld.bfd: 
/mnt/build/tmp/work/x86_64-linux/qemu-system-native/5.1.0-r0/qemu-5.1.0/fsdev/qemu-fsdev-throttle.c:25:
 undefined reference to `unknown_lock_type'
 | 
/usr/lib/gcc/x86_64-wrs-linux/10.1.0/../../../../x86_64-wrs-linux/bin/ld.bfd: 
../fsdev/qemu-fsdev-throttle.o: in function `fsdev_co_throttle_request':
 | 
/mnt/build/tmp/work/x86_64-linux/qemu-system-native/5.1.0-r0/qemu-5.1.0/fsdev/qemu-fsdev-throttle.c:103:
 undefined reference to `unknown_lock_type'
 | 
/usr/lib/gcc/x86_64-wrs-linux/10.1.0/../../../../x86_64-wrs-linux/bin/ld.bfd: 
../fsdev/qemu-fsdev-throttle.o:/mnt/build/tmp/work/x86_64-linux/qemu-system-native/5.1.0-r0/qemu-5.1.0/fsdev/qemu-fsdev-throttle.c:103:
 more undefined references to `unknown_lock_type' follow
 | collect2: error: ld returned 1 exit status

So always define unknown_lock_type to fix the above error.

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
---
 include/qemu/lockable.h | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/include/qemu/lockable.h b/include/qemu/lockable.h
index b620023141..e792ed9a69 100644
--- a/include/qemu/lockable.h
+++ b/include/qemu/lockable.h
@@ -25,17 +25,12 @@ struct QemuLockable {
 };
 
 /* This function gives an error if an invalid, non-NULL pointer type is passed
- * to QEMU_MAKE_LOCKABLE.  For optimized builds, we can rely on dead-code 
elimination
- * from the compiler, and give the errors already at link time.
+ * to QEMU_MAKE_LOCKABLE.
  */
-#if defined(__OPTIMIZE__) && !defined(__SANITIZE_ADDRESS__)
-void unknown_lock_type(void *);
-#else
 static inline void unknown_lock_type(void *unused)
 {
     abort();
 }
-#endif
 
 static inline __attribute__((__always_inline__)) QemuLockable *
 qemu_make_lockable(void *x, QemuLockable *lockable)
-- 
2.26.2