Change 'gid' to 'bgid' for providing buffers

This makes it clear it's a buffer group ID, and not some variant of
a credential related group ID.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/src/include/liburing.h b/src/include/liburing.h
index 7b427f6..6285c4d 100644
--- a/src/include/liburing.h
+++ b/src/include/liburing.h
@@ -412,10 +412,10 @@
 
 static inline void io_uring_prep_provide_buffers(struct io_uring_sqe *sqe,
 						 void *addr, int len, int nr,
-						 int gid, int bid)
+						 int bgid, int bid)
 {
 	io_uring_prep_rw(IORING_OP_PROVIDE_BUFFERS, sqe, nr, addr, len, bid);
-	sqe->buf_group = gid;
+	sqe->buf_group = bgid;
 }
 
 static inline void io_uring_prep_remove_buffers(struct io_uring_sqe *sqe,
diff --git a/test/send_recvmsg.c b/test/send_recvmsg.c
index f28f737..ce08ff1 100644
--- a/test/send_recvmsg.c
+++ b/test/send_recvmsg.c
@@ -21,10 +21,10 @@
 #define PORT	10200
 #define HOST	"127.0.0.1"
 
-#define BUF_GID		10
+#define BUF_BGID	10
 #define BUF_BID		89
 
-static int recv_prep(struct io_uring *ring, struct iovec *iov, int gid)
+static int recv_prep(struct io_uring *ring, struct iovec *iov, int bgid)
 {
 	struct sockaddr_in saddr;
 	struct msghdr msg;
@@ -60,11 +60,11 @@
 
 	sqe = io_uring_get_sqe(ring);
 	io_uring_prep_recvmsg(sqe, sockfd, &msg, 0);
-	if (gid) {
+	if (bgid) {
 		sqe->user_data = (unsigned long) iov->iov_base;
 		iov->iov_base = NULL;
 		sqe->flags |= IOSQE_BUFFER_SELECT;
-		sqe->buf_group = gid;
+		sqe->buf_group = bgid;
 	}
 
 	ret = io_uring_submit(ring);
@@ -150,7 +150,7 @@
 	if (rd->buf_select && !rd->no_buf_add) {
 		sqe = io_uring_get_sqe(&ring);
 		io_uring_prep_provide_buffers(sqe, buf, sizeof(buf) -1, 1,
-						BUF_GID, BUF_BID);
+						BUF_BGID, BUF_BID);
 		ret = io_uring_submit(&ring);
 		if (ret != 1) {
 			fprintf(stderr, "submit ret=%d\n", ret);
@@ -170,7 +170,7 @@
 		}
 	}
 
-	ret = recv_prep(&ring, &iov, rd->buf_select ? BUF_GID : 0);
+	ret = recv_prep(&ring, &iov, rd->buf_select ? BUF_BGID : 0);
 	if (ret) {
 		fprintf(stderr, "recv_prep failed: %d\n", ret);
 		goto err;