From e26e73f37fd1ba454527d08a099397a7d24d4ee8 Mon Sep 17 00:00:00 2001
From: Enji Cooper <ngie@FreeBSD.org>
Date: Mon, 28 Dec 2015 02:01:41 +0000
Subject: [PATCH] Place cancel and error under #ifdef DEBUG to mute
 -Wunused-but-set-variable warnings reported by gcc 4.9

Remove some trailing whitespace as well

Tested with and without -DDEBUG

MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
---
 tests/sys/aio/aio_kqueue_test.c | 37 ++++++++++++++++++++-------------
 1 file changed, 22 insertions(+), 15 deletions(-)

diff --git a/tests/sys/aio/aio_kqueue_test.c b/tests/sys/aio/aio_kqueue_test.c
index 14e47297380d..97c2c38f484d 100644
--- a/tests/sys/aio/aio_kqueue_test.c
+++ b/tests/sys/aio/aio_kqueue_test.c
@@ -62,7 +62,10 @@ main (int argc, char *argv[])
 	struct kevent ke, kq_returned;
 	struct timespec ts;
 	char buffer[32768];
-	int cancel, error, failed = 0, fd, kq, pending, result, run;
+#ifdef DEBUG
+	int cancel, error;
+#endif
+	int failed = 0, fd, kq, pending, result, run;
 	int tmp_file = 0;
 	unsigned i, j;
 
@@ -96,19 +99,19 @@ main (int argc, char *argv[])
 			if (iocb[i] == NULL)
 				err(1, "calloc");
 		}
-		
-		pending = 0;	
+
+		pending = 0;
 		for (i = 0; i < nitems(iocb); i++) {
 			pending++;
 			iocb[i]->aio_nbytes = sizeof(buffer);
 			iocb[i]->aio_buf = buffer;
 			iocb[i]->aio_fildes = fd;
 			iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run;
-			
+
 			iocb[i]->aio_sigevent.sigev_notify_kqueue = kq;
 			iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i];
 			iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT;
-			
+
 			result = aio_write(iocb[i]);
 			if (result != 0) {
 				perror("aio_write");
@@ -133,7 +136,9 @@ main (int argc, char *argv[])
 				}
 			}
 		}
+#ifdef DEBUG
 		cancel = nitems(iocb) - pending;
+#endif
 
 		i = 0;
 		while (pending) {
@@ -144,34 +149,36 @@ main (int argc, char *argv[])
 				bzero(&kq_returned, sizeof(ke));
 				ts.tv_sec = 0;
 				ts.tv_nsec = 1;
-				result = kevent(kq, NULL, 0, 
+				result = kevent(kq, NULL, 0,
 						&kq_returned, 1, &ts);
+#ifdef DEBUG
 				error = errno;
+#endif
 				if (result < 0)
 					perror("kevent error: ");
 				kq_iocb = kq_returned.udata;
 #ifdef DEBUG
 				printf("kevent %d %d errno %d return.ident %p "
-				       "return.data %p return.udata %p %p\n", 
-				       i, result, error, 
-				       kq_returned.ident, kq_returned.data, 
-				       kq_returned.udata, 
+				       "return.data %p return.udata %p %p\n",
+				       i, result, error,
+				       kq_returned.ident, kq_returned.data,
+				       kq_returned.udata,
 				       kq_iocb);
 #endif
-				
+
 				if (kq_iocb)
 					break;
 #ifdef DEBUG
 				printf("Try again left %d out of %d %d\n",
 				    pending, nitems(iocb), cancel);
 #endif
-			}			
-			
+			}
+
 			for (j = 0; j < nitems(iocb) && iocb[j] != kq_iocb;
 			   j++) ;
 #ifdef DEBUG
 			printf("kq_iocb %p\n", kq_iocb);
-			
+
 			printf("Error Result for %d is %d pending %d\n",
 			    j, result, pending);
 #endif
@@ -192,7 +199,7 @@ main (int argc, char *argv[])
 			iocb[j] = NULL;
 			pending--;
 			i++;
-		}	
+		}
 
 		for (i = 0; i < nitems(iocb); i++)
 			free(iocb[i]);