BUILD: peers: use __fallthrough in peer_io_handler()

This avoids 7 build warnings when preprocessing happens before compiling
with gcc >= 7.

diff --git a/src/peers.c b/src/peers.c
index 8477c43e364d04abca391b2fda1c23147d9ecd9d..f9dabf7c0a00003cda2c1e239cb9c855f4476cb8 100644 (file)
--- a/src/peers.c
+++ b/src/peers.c
@@ -2942,7 +2942,7 @@ switchstate:
                                prev_state = appctx->st0;
                                appctx->svcctx = NULL;
                                appctx->st0 = PEER_SESS_ST_GETVERSION;
-                               /* fall through */
+                               __fallthrough;
                        case PEER_SESS_ST_GETVERSION:
                                prev_state = appctx->st0;
                                reql = peer_getline_version(appctx, &maj_ver, &min_ver);
@@ -2953,7 +2953,7 @@ switchstate:
                                }
 
                                appctx->st0 = PEER_SESS_ST_GETHOST;
-                               /* fall through */
+                               __fallthrough;
                        case PEER_SESS_ST_GETHOST:
                                prev_state = appctx->st0;
                                reql = peer_getline_host(appctx);
@@ -2964,7 +2964,7 @@ switchstate:
                                }
 
                                appctx->st0 = PEER_SESS_ST_GETPEER;
-                               /* fall through */
+                               __fallthrough;
                        case PEER_SESS_ST_GETPEER: {
                                prev_state = appctx->st0;
                                reql = peer_getline_last(appctx, &curpeer);
@@ -3006,7 +3006,7 @@ switchstate:
                                appctx->st0 = PEER_SESS_ST_SENDSUCCESS;
                                _HA_ATOMIC_INC(&active_peers);
                        }
-                       /* fall through */
+                       __fallthrough;
                        case PEER_SESS_ST_SENDSUCCESS: {
                                prev_state = appctx->st0;
                                if (!curpeer) {
@@ -3053,7 +3053,7 @@ switchstate:
                                /* switch to the waiting statuscode state */
                                appctx->st0 = PEER_SESS_ST_GETSTATUS;
                        }
-                       /* fall through */
+                       __fallthrough;
                        case PEER_SESS_ST_GETSTATUS: {
                                prev_state = appctx->st0;
                                if (!curpeer) {
@@ -3096,7 +3096,7 @@ switchstate:
                                _HA_ATOMIC_INC(&connected_peers);
                                appctx->st0 = PEER_SESS_ST_WAITMSG;
                        }
-                       /* fall through */
+                       __fallthrough;
                        case PEER_SESS_ST_WAITMSG: {
                                uint32_t msg_len = 0;
                                char *msg_cur = trash.area;
@@ -3186,7 +3186,7 @@ send_msgs:
                                appctx->st0 = PEER_SESS_ST_END;
                                prev_state = appctx->st0;
                        }
-                       /* fall through */
+                       __fallthrough;
                        case PEER_SESS_ST_END: {
                                if (prev_state == PEER_SESS_ST_WAITMSG)
                                        _HA_ATOMIC_DEC(&connected_peers);