blktrace: remove unused idx from devpath.

idx isn't used, so remove it.

Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/blktrace.c b/blktrace.c
index a2bffa2..18c5157 100644
--- a/blktrace.c
+++ b/blktrace.c
@@ -93,7 +93,7 @@ struct devpath {
 	char *path;			/* path to device special file */
 	char *buts_name;		/* name returned from bt kernel code */
 	struct pdc_stats *stats;
-	int fd, idx, ncpus;
+	int fd, ncpus;
 	unsigned long long drops;
 
 	/*
@@ -1248,7 +1248,7 @@ static int add_devpath(char *path)
 	memset(dpp, 0, sizeof(*dpp));
 	dpp->path = strdup(path);
 	dpp->fd = fd;
-	dpp->idx = ndevs++;
+	ndevs++;
 	list_add_tail(&dpp->head, &devpaths);
 
 	return 0;