shared/ring: rename ring_size to ring_used, add ring_avail

2 files changed, 2 insertions, 2 deletions

diff --git a/src/kernel/arch/amd64/driver/ps2.c b/src/kernel/arch/amd64/driver/ps2.c
index 35165d9..9148c98 100644
--- a/src/kernel/arch/amd64/driver/ps2.c
+++ b/src/kernel/arch/amd64/driver/ps2.c
@@ -91,7 +91,7 @@ enum {
 };
 
 static void read_backlog(struct vfs_request *req, ring_t *r, struct vfs_request **queue) {
-	if (ring_size(r) == 0) {
+	if (ring_used(r) == 0) {
 		/* nothing to read, join queue */
 		assert(!req->postqueue_next);
 		while (*queue) queue = &(*queue)->postqueue_next;
diff --git a/src/kernel/arch/amd64/driver/serial.c b/src/kernel/arch/amd64/driver/serial.c
index b3bfe29..cf21b61 100644
--- a/src/kernel/arch/amd64/driver/serial.c
+++ b/src/kernel/arch/amd64/driver/serial.c
@@ -72,7 +72,7 @@ static void accept(struct vfs_request *req) {
 			vfsreq_finish_short(req, valid ? 0 : -1);
 			break;
 		case VFSOP_READ:
-			if (ring_size((void*)&backlog) == 0) {
+			if (ring_used((void*)&backlog) == 0) {
 				/* nothing to read, join queue */
 				assert(!req->postqueue_next);
 				struct vfs_request **slot = &blocked_on;