MFC r278364:

r278364:

  Remove kdb_backtrace extern; get the definition for kdb_backtrace from
  <sys/kdb.h> instead

  Fix whitespace in WARN_ON macro definition

  Reviewed by: np
  Differential Revision: https://reviews.freebsd.org/D1799
  Sponsored by: EMC / Isilon Storage Division

sys/dev/cxgb/cxgb_osdep.h

@@ -39,6 +39,8 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <sys/lock.h>
 #include <sys/mutex.h>
 
+#include <sys/kdb.h>
+
 #include <dev/mii/mii.h>
 
 #ifndef _CXGB_OSDEP_H_
@@ -128,10 +130,8 @@ void prefetch(void *x)
 #define smp_mb() mb()
 
 #define L1_CACHE_BYTES 128
-extern void kdb_backtrace(void);
-
 #define WARN_ON(condition) do { \
-       if (__predict_false((condition)!=0)) {  \
+	if (__predict_false((condition)!=0)) {  \
                 log(LOG_WARNING, "BUG: warning at %s:%d/%s()\n", __FILE__, __LINE__, __FUNCTION__); \
                 kdb_backtrace(); \
         } \