MINOR: buffer: use MT_LIST_ADDQ() for buffer_wait lists additions

The TRY_ADDQ there was not needed since the wait list is exclusively
owned by the caller. There's a preliminary test on MT_LIST_ADDED()
that might have been eliminated by keeping MT_LIST_TRY_ADDQ() but
it would have required two more expensive writes before testing so
better keep the test the way it is.

include/haproxy/channel.h

@@ -850,7 +850,7 @@ static inline int channel_alloc_buffer(struct channel *chn, struct buffer_wait *
 		return 1;
 
 	if (!MT_LIST_ADDED(&wait->list))
-		MT_LIST_TRY_ADDQ(&buffer_wq, &wait->list);
+		MT_LIST_ADDQ(&buffer_wq, &wait->list);
 
 	return 0;
 }

src/flt_spoe.c

@@ -2807,7 +2807,7 @@ spoe_acquire_buffer(struct buffer *buf, struct buffer_wait *buffer_wait)
 	if (b_alloc_margin(buf, global.tune.reserved_bufs))
 		return 1;
 
-	MT_LIST_TRY_ADDQ(&buffer_wq, &buffer_wait->list);
+	MT_LIST_ADDQ(&buffer_wq, &buffer_wait->list);
 	return 0;
 }
 

src/mux_fcgi.c

@@ -605,7 +605,7 @@ static inline struct buffer *fcgi_get_buf(struct fcgi_conn *fconn, struct buffer
 	    unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) {
 		fconn->buf_wait.target = fconn;
 		fconn->buf_wait.wakeup_cb = fcgi_buf_available;
-		MT_LIST_TRY_ADDQ(&buffer_wq, &fconn->buf_wait.list);
+		MT_LIST_ADDQ(&buffer_wq, &fconn->buf_wait.list);
 	}
 	return buf;
 }

src/mux_h1.c

@@ -416,7 +416,7 @@ static inline struct buffer *h1_get_buf(struct h1c *h1c, struct buffer *bptr)
 	    unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) {
 		h1c->buf_wait.target = h1c;
 		h1c->buf_wait.wakeup_cb = h1_buf_available;
-		MT_LIST_TRY_ADDQ(&buffer_wq, &h1c->buf_wait.list);
+		MT_LIST_ADDQ(&buffer_wq, &h1c->buf_wait.list);
 	}
 	return buf;
 }

src/mux_h2.c

@@ -683,7 +683,7 @@ static inline struct buffer *h2_get_buf(struct h2c *h2c, struct buffer *bptr)
 	    unlikely((buf = b_alloc_margin(bptr, 0)) == NULL)) {
 		h2c->buf_wait.target = h2c;
 		h2c->buf_wait.wakeup_cb = h2_buf_available;
-		MT_LIST_TRY_ADDQ(&buffer_wq, &h2c->buf_wait.list);
+		MT_LIST_ADDQ(&buffer_wq, &h2c->buf_wait.list);
 	}
 	return buf;
 }

src/stream.c

@@ -728,7 +728,7 @@ static int stream_alloc_work_buffer(struct stream *s)
 	if (b_alloc_margin(&s->res.buf, 0))
 		return 1;
 
-	MT_LIST_TRY_ADDQ(&buffer_wq, &s->buffer_wait.list);
+	MT_LIST_ADDQ(&buffer_wq, &s->buffer_wait.list);
 	return 0;
 }