Merge tag 's390-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Martin Schwidefsky:

 - Enhancements for the QDIO layer

 - Remove the RCP trace event

 - Avoid three build issues

 - Move the defconfig to the configs directory

* tag 's390-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: move arch/s390/defconfig to arch/s390/configs/defconfig
  s390/qdio: optimize state inspection of HW-owned SBALs
  s390/qdio: use get_buf_state() in debug_get_buf_state()
  s390/qdio: allow to scan all Output SBALs in one go
  s390/cio: Remove tracing for rchp instruction
  s390/kasan: adapt disabled_wait usage to avoid build error
  latent_entropy: avoid build error when plugin cflags are not set
  s390/boot: fix compiler error due to missing awk strtonum

1 files changed, 11 insertions, 8 deletions

diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index cfce255521ac..7b7620de2acd 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -205,17 +205,22 @@ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
 				 int auto_ack, int merge_pending)
 {
 	unsigned char __state = 0;
-	int i;
+	int i = 1;
 
 	if (is_qebsm(q))
 		return qdio_do_eqbs(q, state, bufnr, count, auto_ack);
 
 	/* get initial state: */
 	__state = q->slsb.val[bufnr];
+
+	/* Bail out early if there is no work on the queue: */
+	if (__state & SLSB_OWNER_CU)
+		goto out;
+
 	if (merge_pending && __state == SLSB_P_OUTPUT_PENDING)
 		__state = SLSB_P_OUTPUT_EMPTY;
 
-	for (i = 1; i < count; i++) {
+	for (; i < count; i++) {
 		bufnr = next_buf(bufnr);
 
 		/* merge PENDING into EMPTY: */
@@ -228,6 +233,8 @@ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
 		if (q->slsb.val[bufnr] != __state)
 			break;
 	}
+
+out:
 	*state = __state;
 	return i;
 }
@@ -382,7 +389,7 @@ int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
 {
 	if (need_siga_sync(q))
 		qdio_siga_sync_q(q);
-	return get_buf_states(q, bufnr, state, 1, 0, 0);
+	return get_buf_state(q, bufnr, state, 0);
 }
 
 static inline void qdio_stop_polling(struct qdio_q *q)
@@ -719,11 +726,7 @@ static int get_outbound_buffer_frontier(struct qdio_q *q, unsigned int start)
 		    multicast_outbound(q)))
 			qdio_siga_sync_q(q);
 
-	/*
-	 * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
-	 * would return 0.
-	 */
-	count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
+	count = atomic_read(&q->nr_buf_used);
 	if (!count)
 		return 0;