Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

 * Fix include order for bison/flex-generated C files, from Ben Hutchings

 * Build fixes and documentation corrections from David Ahern

 * Group parsing support, from Jiri Olsa

 * UI/gtk refactorings and improvements from Namhyung Kim

 * NULL deref fix for perf script, from Namhyung Kim

 * Assorted cleanups from Robert Richter

 * Let O= makes handle relative paths, from Steven Rostedt

 * perf script python fixes, from Feng Tang.

 * Improve 'perf lock' error message when the needed tracepoints
   are not present, from David Ahern.

 * Initial bash completion support, from Frederic Weisbecker

 * Allow building without libelf, from Namhyung Kim.

 * Support DWARF CFI based unwind to have callchains when %bp
   based unwinding is not possible, from Jiri Olsa.

 * Symbol resolution fixes, while fixing support PPC64 files with an .opt ELF
   section was the end goal, several fixes for code that handles all
   architectures and cleanups are included, from Cody Schafer.

 * Add a description for the JIT interface, from Andi Kleen.

 * Assorted fixes for Documentation and build in 32 bit, from Robert Richter

 * Add support for non-tracepoint events in perf script python, from Feng Tang

 * Cache the libtraceevent event_format associated to each evsel early, so that we
   avoid relookups, i.e. calling pevent_find_event repeatedly when processing
   tracepoint events.

   [ This is to reduce the surface contact with libtraceevents and make clear what
     is that the perf tools needs from that lib: so far parsing the common and per
     event fields. ]

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 80 insertions, 50 deletions

diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index aceffadb21c..c772d8d2715 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -99,11 +99,6 @@ struct fc_exch_mgr {
 	u16		max_xid;
 	u16		pool_max_index;
 
-	/*
-	 * currently exchange mgr stats are updated but not used.
-	 * either stats can be expose via sysfs or remove them
-	 * all together if not used XXX
-	 */
 	struct {
 		atomic_t no_free_exch;
 		atomic_t no_free_exch_xid;
@@ -124,7 +119,7 @@ struct fc_exch_mgr {
  * for each anchor to determine if that EM should be used. The last
  * anchor in the list will always match to handle any exchanges not
  * handled by other EMs. The non-default EMs would be added to the
- * anchor list by HW that provides FCoE offloads.
+ * anchor list by HW that provides offloads.
  */
 struct fc_exch_mgr_anchor {
 	struct list_head ema_list;
@@ -339,6 +334,52 @@ static void fc_exch_release(struct fc_exch *ep)
 }
 
 /**
+ * fc_exch_timer_cancel() - cancel exch timer
+ * @ep:		The exchange whose timer to be canceled
+ */
+static inline  void fc_exch_timer_cancel(struct fc_exch *ep)
+{
+	if (cancel_delayed_work(&ep->timeout_work)) {
+		FC_EXCH_DBG(ep, "Exchange timer canceled\n");
+		atomic_dec(&ep->ex_refcnt); /* drop hold for timer */
+	}
+}
+
+/**
+ * fc_exch_timer_set_locked() - Start a timer for an exchange w/ the
+ *				the exchange lock held
+ * @ep:		The exchange whose timer will start
+ * @timer_msec: The timeout period
+ *
+ * Used for upper level protocols to time out the exchange.
+ * The timer is cancelled when it fires or when the exchange completes.
+ */
+static inline void fc_exch_timer_set_locked(struct fc_exch *ep,
+					    unsigned int timer_msec)
+{
+	if (ep->state & (FC_EX_RST_CLEANUP | FC_EX_DONE))
+		return;
+
+	FC_EXCH_DBG(ep, "Exchange timer armed : %d msecs\n", timer_msec);
+
+	if (queue_delayed_work(fc_exch_workqueue, &ep->timeout_work,
+			       msecs_to_jiffies(timer_msec)))
+		fc_exch_hold(ep);		/* hold for timer */
+}
+
+/**
+ * fc_exch_timer_set() - Lock the exchange and set the timer
+ * @ep:		The exchange whose timer will start
+ * @timer_msec: The timeout period
+ */
+static void fc_exch_timer_set(struct fc_exch *ep, unsigned int timer_msec)
+{
+	spin_lock_bh(&ep->ex_lock);
+	fc_exch_timer_set_locked(ep, timer_msec);
+	spin_unlock_bh(&ep->ex_lock);
+}
+
+/**
  * fc_exch_done_locked() - Complete an exchange with the exchange lock held
  * @ep: The exchange that is complete
  */
@@ -359,8 +400,7 @@ static int fc_exch_done_locked(struct fc_exch *ep)
 
 	if (!(ep->esb_stat & ESB_ST_REC_QUAL)) {
 		ep->state |= FC_EX_DONE;
-		if (cancel_delayed_work(&ep->timeout_work))
-			atomic_dec(&ep->ex_refcnt); /* drop hold for timer */
+		fc_exch_timer_cancel(ep);
 		rc = 0;
 	}
 	return rc;
@@ -424,40 +464,6 @@ static void fc_exch_delete(struct fc_exch *ep)
 }
 
 /**
- * fc_exch_timer_set_locked() - Start a timer for an exchange w/ the
- *				the exchange lock held
- * @ep:		The exchange whose timer will start
- * @timer_msec: The timeout period
- *
- * Used for upper level protocols to time out the exchange.
- * The timer is cancelled when it fires or when the exchange completes.
- */
-static inline void fc_exch_timer_set_locked(struct fc_exch *ep,
-					    unsigned int timer_msec)
-{
-	if (ep->state & (FC_EX_RST_CLEANUP | FC_EX_DONE))
-		return;
-
-	FC_EXCH_DBG(ep, "Exchange timer armed\n");
-
-	if (queue_delayed_work(fc_exch_workqueue, &ep->timeout_work,
-			       msecs_to_jiffies(timer_msec)))
-		fc_exch_hold(ep);		/* hold for timer */
-}
-
-/**
- * fc_exch_timer_set() - Lock the exchange and set the timer
- * @ep:		The exchange whose timer will start
- * @timer_msec: The timeout period
- */
-static void fc_exch_timer_set(struct fc_exch *ep, unsigned int timer_msec)
-{
-	spin_lock_bh(&ep->ex_lock);
-	fc_exch_timer_set_locked(ep, timer_msec);
-	spin_unlock_bh(&ep->ex_lock);
-}
-
-/**
  * fc_seq_send() - Send a frame using existing sequence/exchange pair
  * @lport: The local port that the exchange will be sent on
  * @sp:	   The sequence to be sent
@@ -986,7 +992,7 @@ static enum fc_pf_rjt_reason fc_seq_lookup_recip(struct fc_lport *lport,
 				/*
 				 * Update sequence_id based on incoming last
 				 * frame of sequence exchange. This is needed
-				 * for FCoE target where DDP has been used
+				 * for FC target where DDP has been used
 				 * on target where, stack is indicated only
 				 * about last frame's (payload _header) header.
 				 * Whereas "seq_id" which is part of
@@ -1549,8 +1555,10 @@ static void fc_exch_abts_resp(struct fc_exch *ep, struct fc_frame *fp)
 	FC_EXCH_DBG(ep, "exch: BLS rctl %x - %s\n", fh->fh_r_ctl,
 		    fc_exch_rctl_name(fh->fh_r_ctl));
 
-	if (cancel_delayed_work_sync(&ep->timeout_work))
+	if (cancel_delayed_work_sync(&ep->timeout_work)) {
+		FC_EXCH_DBG(ep, "Exchange timer canceled\n");
 		fc_exch_release(ep);	/* release from pending timer hold */
+	}
 
 	spin_lock_bh(&ep->ex_lock);
 	switch (fh->fh_r_ctl) {
@@ -1737,8 +1745,7 @@ static void fc_exch_reset(struct fc_exch *ep)
 	spin_lock_bh(&ep->ex_lock);
 	fc_exch_abort_locked(ep, 0);
 	ep->state |= FC_EX_RST_CLEANUP;
-	if (cancel_delayed_work(&ep->timeout_work))
-		atomic_dec(&ep->ex_refcnt);	/* drop hold for timer */
+	fc_exch_timer_cancel(ep);
 	resp = ep->resp;
 	ep->resp = NULL;
 	if (ep->esb_stat & ESB_ST_REC_QUAL)
@@ -2133,10 +2140,8 @@ static void fc_exch_els_rrq(struct fc_frame *fp)
 		ep->esb_stat &= ~ESB_ST_REC_QUAL;
 		atomic_dec(&ep->ex_refcnt);	/* drop hold for rec qual */
 	}
-	if (ep->esb_stat & ESB_ST_COMPLETE) {
-		if (cancel_delayed_work(&ep->timeout_work))
-			atomic_dec(&ep->ex_refcnt);	/* drop timer hold */
-	}
+	if (ep->esb_stat & ESB_ST_COMPLETE)
+		fc_exch_timer_cancel(ep);
 
 	spin_unlock_bh(&ep->ex_lock);
 
@@ -2156,6 +2161,31 @@ out:
 }
 
 /**
+ * fc_exch_update_stats() - update exches stats to lport
+ * @lport: The local port to update exchange manager stats
+ */
+void fc_exch_update_stats(struct fc_lport *lport)
+{
+	struct fc_host_statistics *st;
+	struct fc_exch_mgr_anchor *ema;
+	struct fc_exch_mgr *mp;
+
+	st = &lport->host_stats;
+
+	list_for_each_entry(ema, &lport->ema_list, ema_list) {
+		mp = ema->mp;
+		st->fc_no_free_exch += atomic_read(&mp->stats.no_free_exch);
+		st->fc_no_free_exch_xid +=
+				atomic_read(&mp->stats.no_free_exch_xid);
+		st->fc_xid_not_found += atomic_read(&mp->stats.xid_not_found);
+		st->fc_xid_busy += atomic_read(&mp->stats.xid_busy);
+		st->fc_seq_not_found += atomic_read(&mp->stats.seq_not_found);
+		st->fc_non_bls_resp += atomic_read(&mp->stats.non_bls_resp);
+	}
+}
+EXPORT_SYMBOL(fc_exch_update_stats);
+
+/**
  * fc_exch_mgr_add() - Add an exchange manager to a local port's list of EMs
  * @lport: The local port to add the exchange manager to
  * @mp:	   The exchange manager to be added to the local port