[PATCH v4 1/4] i915: Move list_count() to list.h for broader use

[PATCH v4 1/4] i915: Move list_count() to list.h for broader use

[Andy Shevchenko]

Some of the existing users, and definitely will be new ones, want to
count existing nodes in the list. Provide a generic API for that by
moving code from i915 to list.h.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
v4: fixed prototype when converting to static inline
v3: added tag (Jani), changed to be static inline (Mike)
v2: dropped the duplicate code in i915 (LKP)
 drivers/gpu/drm/i915/gt/intel_engine_cs.c | 13 +------------
 include/linux/list.h                      | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index c33e0d72d670..b96c8217743c 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -2094,17 +2094,6 @@ static void print_request_ring(struct drm_printer *m, struct i915_request *rq)
 	}
 }
 
-static unsigned long list_count(struct list_head *list)
-{
-	struct list_head *pos;
-	unsigned long count = 0;
-
-	list_for_each(pos, list)
-		count++;
-
-	return count;
-}
-
 static unsigned long read_ul(void *p, size_t x)
 {
 	return *(unsigned long *)(p + x);
@@ -2279,7 +2268,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
 	spin_lock_irqsave(&engine->sched_engine->lock, flags);
 	engine_dump_active_requests(engine, m);
 
-	drm_printf(m, "\tOn hold?: %lu\n",
+	drm_printf(m, "\tOn hold?: %zu\n",
 		   list_count(&engine->sched_engine->hold));
 	spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
 
diff --git a/include/linux/list.h b/include/linux/list.h
index 61762054b4be..632a298c7018 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -655,6 +655,21 @@ static inline void list_splice_tail_init(struct list_head *list,
 	     !list_is_head(pos, (head)); \
 	     pos = n, n = pos->prev)
 
+/**
+ * list_count - count nodes in the list
+ * @head:	the head for your list.
+ */
+static inline size_t list_count(struct list_head *head)
+{
+	struct list_head *pos;
+	size_t count = 0;
+
+	list_for_each(pos, head)
+		count++;
+
+	return count;
+}
+
 /**
  * list_entry_is_head - test if the entry points to the head of the list
  * @pos:	the type * to cursor
-- 
2.35.1

[PATCH v4 1/4] i915: Move list_count() to list.h for broader use

[Andy Shevchenko]

Some of the existing users, and definitely will be new ones, want to
count existing nodes in the list. Provide a generic API for that by
moving code from i915 to list.h.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
v4: fixed prototype when converting to static inline
v3: added tag (Jani), changed to be static inline (Mike)
v2: dropped the duplicate code in i915 (LKP)
 drivers/gpu/drm/i915/gt/intel_engine_cs.c | 13 +------------
 include/linux/list.h                      | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index c33e0d72d670..b96c8217743c 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -2094,17 +2094,6 @@ static void print_request_ring(struct drm_printer *m, struct i915_request *rq)
 	}
 }
 
-static unsigned long list_count(struct list_head *list)
-{
-	struct list_head *pos;
-	unsigned long count = 0;
-
-	list_for_each(pos, list)
-		count++;
-
-	return count;
-}
-
 static unsigned long read_ul(void *p, size_t x)
 {
 	return *(unsigned long *)(p + x);
@@ -2279,7 +2268,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
 	spin_lock_irqsave(&engine->sched_engine->lock, flags);
 	engine_dump_active_requests(engine, m);
 
-	drm_printf(m, "\tOn hold?: %lu\n",
+	drm_printf(m, "\tOn hold?: %zu\n",
 		   list_count(&engine->sched_engine->hold));
 	spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
 
diff --git a/include/linux/list.h b/include/linux/list.h
index 61762054b4be..632a298c7018 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -655,6 +655,21 @@ static inline void list_splice_tail_init(struct list_head *list,
 	     !list_is_head(pos, (head)); \
 	     pos = n, n = pos->prev)
 
+/**
+ * list_count - count nodes in the list
+ * @head:	the head for your list.
+ */
+static inline size_t list_count(struct list_head *head)
+{
+	struct list_head *pos;
+	size_t count = 0;
+
+	list_for_each(pos, head)
+		count++;
+
+	return count;
+}
+
 /**
  * list_entry_is_head - test if the entry points to the head of the list
  * @pos:	the type * to cursor
-- 
2.35.1

[Intel-gfx] [PATCH v4 1/4] i915: Move list_count() to list.h for broader use

[Andy Shevchenko]

Some of the existing users, and definitely will be new ones, want to
count existing nodes in the list. Provide a generic API for that by
moving code from i915 to list.h.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
v4: fixed prototype when converting to static inline
v3: added tag (Jani), changed to be static inline (Mike)
v2: dropped the duplicate code in i915 (LKP)
 drivers/gpu/drm/i915/gt/intel_engine_cs.c | 13 +------------
 include/linux/list.h                      | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index c33e0d72d670..b96c8217743c 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -2094,17 +2094,6 @@ static void print_request_ring(struct drm_printer *m, struct i915_request *rq)
 	}
 }
 
-static unsigned long list_count(struct list_head *list)
-{
-	struct list_head *pos;
-	unsigned long count = 0;
-
-	list_for_each(pos, list)
-		count++;
-
-	return count;
-}
-
 static unsigned long read_ul(void *p, size_t x)
 {
 	return *(unsigned long *)(p + x);
@@ -2279,7 +2268,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
 	spin_lock_irqsave(&engine->sched_engine->lock, flags);
 	engine_dump_active_requests(engine, m);
 
-	drm_printf(m, "\tOn hold?: %lu\n",
+	drm_printf(m, "\tOn hold?: %zu\n",
 		   list_count(&engine->sched_engine->hold));
 	spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
 
diff --git a/include/linux/list.h b/include/linux/list.h
index 61762054b4be..632a298c7018 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -655,6 +655,21 @@ static inline void list_splice_tail_init(struct list_head *list,
 	     !list_is_head(pos, (head)); \
 	     pos = n, n = pos->prev)
 
+/**
+ * list_count - count nodes in the list
+ * @head:	the head for your list.
+ */
+static inline size_t list_count(struct list_head *head)
+{
+	struct list_head *pos;
+	size_t count = 0;
+
+	list_for_each(pos, head)
+		count++;
+
+	return count;
+}
+
 /**
  * list_entry_is_head - test if the entry points to the head of the list
  * @pos:	the type * to cursor
-- 
2.35.1

[PATCH v4 2/4] usb: gadget: hid: Convert to use list_count()

[Andy Shevchenko]

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v4: no change
v3: fixed typo in the commit message (Fabio)
v2: no change
 drivers/usb/gadget/legacy/hid.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/gadget/legacy/hid.c b/drivers/usb/gadget/legacy/hid.c
index 1187ee4f316a..6196c3456e0b 100644
--- a/drivers/usb/gadget/legacy/hid.c
+++ b/drivers/usb/gadget/legacy/hid.c
@@ -133,14 +133,11 @@ static struct usb_configuration config_driver = {
 static int hid_bind(struct usb_composite_dev *cdev)
 {
 	struct usb_gadget *gadget = cdev->gadget;
-	struct list_head *tmp;
 	struct hidg_func_node *n = NULL, *m, *iter_n;
 	struct f_hid_opts *hid_opts;
-	int status, funcs = 0;
-
-	list_for_each(tmp, &hidg_func_list)
-		funcs++;
+	int status, funcs;
 
+	funcs = list_count(&hidg_func_list);
 	if (!funcs)
 		return -ENODEV;
 
-- 
2.35.1

[PATCH v4 2/4] usb: gadget: hid: Convert to use list_count()

[Andy Shevchenko]

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v4: no change
v3: fixed typo in the commit message (Fabio)
v2: no change
 drivers/usb/gadget/legacy/hid.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/gadget/legacy/hid.c b/drivers/usb/gadget/legacy/hid.c
index 1187ee4f316a..6196c3456e0b 100644
--- a/drivers/usb/gadget/legacy/hid.c
+++ b/drivers/usb/gadget/legacy/hid.c
@@ -133,14 +133,11 @@ static struct usb_configuration config_driver = {
 static int hid_bind(struct usb_composite_dev *cdev)
 {
 	struct usb_gadget *gadget = cdev->gadget;
-	struct list_head *tmp;
 	struct hidg_func_node *n = NULL, *m, *iter_n;
 	struct f_hid_opts *hid_opts;
-	int status, funcs = 0;
-
-	list_for_each(tmp, &hidg_func_list)
-		funcs++;
+	int status, funcs;
 
+	funcs = list_count(&hidg_func_list);
 	if (!funcs)
 		return -ENODEV;
 
-- 
2.35.1

[Intel-gfx] [PATCH v4 2/4] usb: gadget: hid: Convert to use list_count()

[Andy Shevchenko]

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v4: no change
v3: fixed typo in the commit message (Fabio)
v2: no change
 drivers/usb/gadget/legacy/hid.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/gadget/legacy/hid.c b/drivers/usb/gadget/legacy/hid.c
index 1187ee4f316a..6196c3456e0b 100644
--- a/drivers/usb/gadget/legacy/hid.c
+++ b/drivers/usb/gadget/legacy/hid.c
@@ -133,14 +133,11 @@ static struct usb_configuration config_driver = {
 static int hid_bind(struct usb_composite_dev *cdev)
 {
 	struct usb_gadget *gadget = cdev->gadget;
-	struct list_head *tmp;
 	struct hidg_func_node *n = NULL, *m, *iter_n;
 	struct f_hid_opts *hid_opts;
-	int status, funcs = 0;
-
-	list_for_each(tmp, &hidg_func_list)
-		funcs++;
+	int status, funcs;
 
+	funcs = list_count(&hidg_func_list);
 	if (!funcs)
 		return -ENODEV;
 
-- 
2.35.1

[PATCH v4 3/4] usb: gadget: udc: bcm63xx: Convert to use list_count()

[Andy Shevchenko]

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v4: no change
v3: no change
v2: no change
 drivers/usb/gadget/udc/bcm63xx_udc.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/gadget/udc/bcm63xx_udc.c b/drivers/usb/gadget/udc/bcm63xx_udc.c
index 2cdb07905bde..0762e49e85f8 100644
--- a/drivers/usb/gadget/udc/bcm63xx_udc.c
+++ b/drivers/usb/gadget/udc/bcm63xx_udc.c
@@ -2172,7 +2172,6 @@ static int bcm63xx_iudma_dbg_show(struct seq_file *s, void *p)
 
 	for (ch_idx = 0; ch_idx < BCM63XX_NUM_IUDMA; ch_idx++) {
 		struct iudma_ch *iudma = &udc->iudma[ch_idx];
-		struct list_head *pos;
 
 		seq_printf(s, "IUDMA channel %d -- ", ch_idx);
 		switch (iudma_defaults[ch_idx].ep_type) {
@@ -2205,14 +2204,10 @@ static int bcm63xx_iudma_dbg_show(struct seq_file *s, void *p)
 		seq_printf(s, "  desc: %d/%d used", iudma->n_bds_used,
 			   iudma->n_bds);
 
-		if (iudma->bep) {
-			i = 0;
-			list_for_each(pos, &iudma->bep->queue)
-				i++;
-			seq_printf(s, "; %d queued\n", i);
-		} else {
+		if (iudma->bep)
+			seq_printf(s, "; %zu queued\n", list_count(&iudma->bep->queue));
+		else
 			seq_printf(s, "\n");
-		}
 
 		for (i = 0; i < iudma->n_bds; i++) {
 			struct bcm_enet_desc *d = &iudma->bd_ring[i];
-- 
2.35.1

[PATCH v4 3/4] usb: gadget: udc: bcm63xx: Convert to use list_count()

[Andy Shevchenko]

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v4: no change
v3: no change
v2: no change
 drivers/usb/gadget/udc/bcm63xx_udc.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/gadget/udc/bcm63xx_udc.c b/drivers/usb/gadget/udc/bcm63xx_udc.c
index 2cdb07905bde..0762e49e85f8 100644
--- a/drivers/usb/gadget/udc/bcm63xx_udc.c
+++ b/drivers/usb/gadget/udc/bcm63xx_udc.c
@@ -2172,7 +2172,6 @@ static int bcm63xx_iudma_dbg_show(struct seq_file *s, void *p)
 
 	for (ch_idx = 0; ch_idx < BCM63XX_NUM_IUDMA; ch_idx++) {
 		struct iudma_ch *iudma = &udc->iudma[ch_idx];
-		struct list_head *pos;
 
 		seq_printf(s, "IUDMA channel %d -- ", ch_idx);
 		switch (iudma_defaults[ch_idx].ep_type) {
@@ -2205,14 +2204,10 @@ static int bcm63xx_iudma_dbg_show(struct seq_file *s, void *p)
 		seq_printf(s, "  desc: %d/%d used", iudma->n_bds_used,
 			   iudma->n_bds);
 
-		if (iudma->bep) {
-			i = 0;
-			list_for_each(pos, &iudma->bep->queue)
-				i++;
-			seq_printf(s, "; %d queued\n", i);
-		} else {
+		if (iudma->bep)
+			seq_printf(s, "; %zu queued\n", list_count(&iudma->bep->queue));
+		else
 			seq_printf(s, "\n");
-		}
 
 		for (i = 0; i < iudma->n_bds; i++) {
 			struct bcm_enet_desc *d = &iudma->bd_ring[i];
-- 
2.35.1

[Intel-gfx] [PATCH v4 3/4] usb: gadget: udc: bcm63xx: Convert to use list_count()

[Andy Shevchenko]

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v4: no change
v3: no change
v2: no change
 drivers/usb/gadget/udc/bcm63xx_udc.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/gadget/udc/bcm63xx_udc.c b/drivers/usb/gadget/udc/bcm63xx_udc.c
index 2cdb07905bde..0762e49e85f8 100644
--- a/drivers/usb/gadget/udc/bcm63xx_udc.c
+++ b/drivers/usb/gadget/udc/bcm63xx_udc.c
@@ -2172,7 +2172,6 @@ static int bcm63xx_iudma_dbg_show(struct seq_file *s, void *p)
 
 	for (ch_idx = 0; ch_idx < BCM63XX_NUM_IUDMA; ch_idx++) {
 		struct iudma_ch *iudma = &udc->iudma[ch_idx];
-		struct list_head *pos;
 
 		seq_printf(s, "IUDMA channel %d -- ", ch_idx);
 		switch (iudma_defaults[ch_idx].ep_type) {
@@ -2205,14 +2204,10 @@ static int bcm63xx_iudma_dbg_show(struct seq_file *s, void *p)
 		seq_printf(s, "  desc: %d/%d used", iudma->n_bds_used,
 			   iudma->n_bds);
 
-		if (iudma->bep) {
-			i = 0;
-			list_for_each(pos, &iudma->bep->queue)
-				i++;
-			seq_printf(s, "; %d queued\n", i);
-		} else {
+		if (iudma->bep)
+			seq_printf(s, "; %zu queued\n", list_count(&iudma->bep->queue));
+		else
 			seq_printf(s, "\n");
-		}
 
 		for (i = 0; i < iudma->n_bds; i++) {
 			struct bcm_enet_desc *d = &iudma->bd_ring[i];
-- 
2.35.1

[PATCH v4 4/4] xhci: Convert to use list_count()

[Andy Shevchenko]

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
v4: added tag (Mathias)
v3: no change
v2: no change
 drivers/usb/host/xhci-ring.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index ad81e9a508b1..817c31e3b0c8 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2532,7 +2532,6 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 	union xhci_trb *ep_trb;
 	int status = -EINPROGRESS;
 	struct xhci_ep_ctx *ep_ctx;
-	struct list_head *tmp;
 	u32 trb_comp_code;
 	int td_num = 0;
 	bool handling_skipped_tds = false;
@@ -2580,10 +2579,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 	}
 
 	/* Count current td numbers if ep->skip is set */
-	if (ep->skip) {
-		list_for_each(tmp, &ep_ring->td_list)
-			td_num++;
-	}
+	if (ep->skip)
+		td_num += list_count(&ep_ring->td_list);
 
 	/* Look for common error cases */
 	switch (trb_comp_code) {
-- 
2.35.1

[PATCH v4 4/4] xhci: Convert to use list_count()

[Andy Shevchenko]

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
v4: added tag (Mathias)
v3: no change
v2: no change
 drivers/usb/host/xhci-ring.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index ad81e9a508b1..817c31e3b0c8 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2532,7 +2532,6 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 	union xhci_trb *ep_trb;
 	int status = -EINPROGRESS;
 	struct xhci_ep_ctx *ep_ctx;
-	struct list_head *tmp;
 	u32 trb_comp_code;
 	int td_num = 0;
 	bool handling_skipped_tds = false;
@@ -2580,10 +2579,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 	}
 
 	/* Count current td numbers if ep->skip is set */
-	if (ep->skip) {
-		list_for_each(tmp, &ep_ring->td_list)
-			td_num++;
-	}
+	if (ep->skip)
+		td_num += list_count(&ep_ring->td_list);
 
 	/* Look for common error cases */
 	switch (trb_comp_code) {
-- 
2.35.1

[Intel-gfx] [PATCH v4 4/4] xhci: Convert to use list_count()

[Andy Shevchenko]

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
v4: added tag (Mathias)
v3: no change
v2: no change
 drivers/usb/host/xhci-ring.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index ad81e9a508b1..817c31e3b0c8 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2532,7 +2532,6 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 	union xhci_trb *ep_trb;
 	int status = -EINPROGRESS;
 	struct xhci_ep_ctx *ep_ctx;
-	struct list_head *tmp;
 	u32 trb_comp_code;
 	int td_num = 0;
 	bool handling_skipped_tds = false;
@@ -2580,10 +2579,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 	}
 
 	/* Count current td numbers if ep->skip is set */
-	if (ep->skip) {
-		list_for_each(tmp, &ep_ring->td_list)
-			td_num++;
-	}
+	if (ep->skip)
+		td_num += list_count(&ep_ring->td_list);
 
 	/* Look for common error cases */
 	switch (trb_comp_code) {
-- 
2.35.1

Re: [PATCH v4 1/4] i915: Move list_count() to list.h for broader use

[Lucas De Marchi]

On Wed, Nov 23, 2022 at 04:48:58PM +0200, Andy Shevchenko wrote:
>Some of the existing users, and definitely will be new ones, want to
>count existing nodes in the list. Provide a generic API for that by
>moving code from i915 to list.h.
>
>Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
>Acked-by: Jani Nikula <jani.nikula@intel.com>


Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>

thanks
Lucas De Marchi

>---
>v4: fixed prototype when converting to static inline
>v3: added tag (Jani), changed to be static inline (Mike)
>v2: dropped the duplicate code in i915 (LKP)
> drivers/gpu/drm/i915/gt/intel_engine_cs.c | 13 +------------
> include/linux/list.h                      | 15 +++++++++++++++
> 2 files changed, 16 insertions(+), 12 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
>index c33e0d72d670..b96c8217743c 100644
>--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
>+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
>@@ -2094,17 +2094,6 @@ static void print_request_ring(struct drm_printer *m, struct i915_request *rq)
> 	}
> }
>
>-static unsigned long list_count(struct list_head *list)
>-{
>-	struct list_head *pos;
>-	unsigned long count = 0;
>-
>-	list_for_each(pos, list)
>-		count++;
>-
>-	return count;
>-}
>-
> static unsigned long read_ul(void *p, size_t x)
> {
> 	return *(unsigned long *)(p + x);
>@@ -2279,7 +2268,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
> 	spin_lock_irqsave(&engine->sched_engine->lock, flags);
> 	engine_dump_active_requests(engine, m);
>
>-	drm_printf(m, "\tOn hold?: %lu\n",
>+	drm_printf(m, "\tOn hold?: %zu\n",
> 		   list_count(&engine->sched_engine->hold));
> 	spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
>
>diff --git a/include/linux/list.h b/include/linux/list.h
>index 61762054b4be..632a298c7018 100644
>--- a/include/linux/list.h
>+++ b/include/linux/list.h
>@@ -655,6 +655,21 @@ static inline void list_splice_tail_init(struct list_head *list,
> 	     !list_is_head(pos, (head)); \
> 	     pos = n, n = pos->prev)
>
>+/**
>+ * list_count - count nodes in the list
>+ * @head:	the head for your list.
>+ */
>+static inline size_t list_count(struct list_head *head)
>+{
>+	struct list_head *pos;
>+	size_t count = 0;
>+
>+	list_for_each(pos, head)
>+		count++;
>+
>+	return count;
>+}
>+
> /**
>  * list_entry_is_head - test if the entry points to the head of the list
>  * @pos:	the type * to cursor
>-- 
>2.35.1
>

Re: [Intel-gfx] [PATCH v4 1/4] i915: Move list_count() to list.h for broader use

[Lucas De Marchi]

On Wed, Nov 23, 2022 at 04:48:58PM +0200, Andy Shevchenko wrote:
>Some of the existing users, and definitely will be new ones, want to
>count existing nodes in the list. Provide a generic API for that by
>moving code from i915 to list.h.
>
>Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
>Acked-by: Jani Nikula <jani.nikula@intel.com>


Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>

thanks
Lucas De Marchi

>---
>v4: fixed prototype when converting to static inline
>v3: added tag (Jani), changed to be static inline (Mike)
>v2: dropped the duplicate code in i915 (LKP)
> drivers/gpu/drm/i915/gt/intel_engine_cs.c | 13 +------------
> include/linux/list.h                      | 15 +++++++++++++++
> 2 files changed, 16 insertions(+), 12 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
>index c33e0d72d670..b96c8217743c 100644
>--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
>+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
>@@ -2094,17 +2094,6 @@ static void print_request_ring(struct drm_printer *m, struct i915_request *rq)
> 	}
> }
>
>-static unsigned long list_count(struct list_head *list)
>-{
>-	struct list_head *pos;
>-	unsigned long count = 0;
>-
>-	list_for_each(pos, list)
>-		count++;
>-
>-	return count;
>-}
>-
> static unsigned long read_ul(void *p, size_t x)
> {
> 	return *(unsigned long *)(p + x);
>@@ -2279,7 +2268,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
> 	spin_lock_irqsave(&engine->sched_engine->lock, flags);
> 	engine_dump_active_requests(engine, m);
>
>-	drm_printf(m, "\tOn hold?: %lu\n",
>+	drm_printf(m, "\tOn hold?: %zu\n",
> 		   list_count(&engine->sched_engine->hold));
> 	spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
>
>diff --git a/include/linux/list.h b/include/linux/list.h
>index 61762054b4be..632a298c7018 100644
>--- a/include/linux/list.h
>+++ b/include/linux/list.h
>@@ -655,6 +655,21 @@ static inline void list_splice_tail_init(struct list_head *list,
> 	     !list_is_head(pos, (head)); \
> 	     pos = n, n = pos->prev)
>
>+/**
>+ * list_count - count nodes in the list
>+ * @head:	the head for your list.
>+ */
>+static inline size_t list_count(struct list_head *head)
>+{
>+	struct list_head *pos;
>+	size_t count = 0;
>+
>+	list_for_each(pos, head)
>+		count++;
>+
>+	return count;
>+}
>+
> /**
>  * list_entry_is_head - test if the entry points to the head of the list
>  * @pos:	the type * to cursor
>-- 
>2.35.1
>

Re: [PATCH v4 1/4] i915: Move list_count() to list.h for broader use

[Lucas De Marchi]

On Wed, Nov 23, 2022 at 04:48:58PM +0200, Andy Shevchenko wrote:
>Some of the existing users, and definitely will be new ones, want to
>count existing nodes in the list. Provide a generic API for that by
>moving code from i915 to list.h.
>
>Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
>Acked-by: Jani Nikula <jani.nikula@intel.com>


Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>

thanks
Lucas De Marchi

>---
>v4: fixed prototype when converting to static inline
>v3: added tag (Jani), changed to be static inline (Mike)
>v2: dropped the duplicate code in i915 (LKP)
> drivers/gpu/drm/i915/gt/intel_engine_cs.c | 13 +------------
> include/linux/list.h                      | 15 +++++++++++++++
> 2 files changed, 16 insertions(+), 12 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
>index c33e0d72d670..b96c8217743c 100644
>--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
>+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
>@@ -2094,17 +2094,6 @@ static void print_request_ring(struct drm_printer *m, struct i915_request *rq)
> 	}
> }
>
>-static unsigned long list_count(struct list_head *list)
>-{
>-	struct list_head *pos;
>-	unsigned long count = 0;
>-
>-	list_for_each(pos, list)
>-		count++;
>-
>-	return count;
>-}
>-
> static unsigned long read_ul(void *p, size_t x)
> {
> 	return *(unsigned long *)(p + x);
>@@ -2279,7 +2268,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
> 	spin_lock_irqsave(&engine->sched_engine->lock, flags);
> 	engine_dump_active_requests(engine, m);
>
>-	drm_printf(m, "\tOn hold?: %lu\n",
>+	drm_printf(m, "\tOn hold?: %zu\n",
> 		   list_count(&engine->sched_engine->hold));
> 	spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
>
>diff --git a/include/linux/list.h b/include/linux/list.h
>index 61762054b4be..632a298c7018 100644
>--- a/include/linux/list.h
>+++ b/include/linux/list.h
>@@ -655,6 +655,21 @@ static inline void list_splice_tail_init(struct list_head *list,
> 	     !list_is_head(pos, (head)); \
> 	     pos = n, n = pos->prev)
>
>+/**
>+ * list_count - count nodes in the list
>+ * @head:	the head for your list.
>+ */
>+static inline size_t list_count(struct list_head *head)
>+{
>+	struct list_head *pos;
>+	size_t count = 0;
>+
>+	list_for_each(pos, head)
>+		count++;
>+
>+	return count;
>+}
>+
> /**
>  * list_entry_is_head - test if the entry points to the head of the list
>  * @pos:	the type * to cursor
>-- 
>2.35.1
>

[Intel-gfx] ✗ Fi.CI.SPARSE: warning for series starting with [v4,1/4] i915: Move list_count() to list.h for broader use

[Patchwork]

== Series Details ==

Series: series starting with [v4,1/4] i915: Move list_count() to list.h for broader use
URL   : https://patchwork.freedesktop.org/series/111259/
State : warning

== Summary ==

Error: dim sparse failed
Sparse version: v0.6.2
Fast mode used, each commit won't be checked separately.

[Intel-gfx] ✗ Fi.CI.DOCS: warning for series starting with [v4,1/4] i915: Move list_count() to list.h for broader use

[Patchwork]

== Series Details ==

Series: series starting with [v4,1/4] i915: Move list_count() to list.h for broader use
URL   : https://patchwork.freedesktop.org/series/111259/
State : warning

== Summary ==

Error: make htmldocs had i915 warnings
./drivers/gpu/drm/i915/gt/intel_gt_mcr.c:739: warning: expecting prototype for intel_gt_mcr_wait_for_reg_fw(). Prototype was for intel_gt_mcr_wait_for_reg() instead
./drivers/gpu/drm/i915/gt/intel_gt_mcr.c:739: warning: expecting prototype for intel_gt_mcr_wait_for_reg_fw(). Prototype was for intel_gt_mcr_wait_for_reg() instead

[Intel-gfx] ✓ Fi.CI.BAT: success for series starting with [v4,1/4] i915: Move list_count() to list.h for broader use

[Patchwork]

[-- Attachment #1: Type: text/plain, Size: 6407 bytes --]

== Series Details ==

Series: series starting with [v4,1/4] i915: Move list_count() to list.h for broader use
URL   : https://patchwork.freedesktop.org/series/111259/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_12423 -> Patchwork_111259v1
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/index.html

Participating hosts (37 -> 37)
------------------------------

  Additional (2): fi-cfl-8109u fi-apl-guc 
  Missing    (2): fi-ctg-p8600 fi-ilk-m540 

Known issues
------------

  Here are the changes found in Patchwork_111259v1 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@core_hotunplug@unbind-rebind:
    - fi-apl-guc:         NOTRUN -> [INCOMPLETE][1] ([i915#7073])
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/fi-apl-guc/igt@core_hotunplug@unbind-rebind.html

  * igt@gem_huc_copy@huc-copy:
    - fi-cfl-8109u:       NOTRUN -> [SKIP][2] ([fdo#109271] / [i915#2190])
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/fi-cfl-8109u/igt@gem_huc_copy@huc-copy.html

  * igt@gem_lmem_swapping@verify-random:
    - fi-cfl-8109u:       NOTRUN -> [SKIP][3] ([fdo#109271] / [i915#4613]) +3 similar issues
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/fi-cfl-8109u/igt@gem_lmem_swapping@verify-random.html

  * igt@i915_selftest@live@gt_heartbeat:
    - fi-glk-j4005:       [PASS][4] -> [DMESG-FAIL][5] ([i915#5334])
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_12423/fi-glk-j4005/igt@i915_selftest@live@gt_heartbeat.html
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/fi-glk-j4005/igt@i915_selftest@live@gt_heartbeat.html

  * igt@kms_chamelium@dp-crc-fast:
    - fi-cfl-8109u:       NOTRUN -> [SKIP][6] ([fdo#109271] / [fdo#111827]) +8 similar issues
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/fi-cfl-8109u/igt@kms_chamelium@dp-crc-fast.html

  * igt@kms_chamelium@hdmi-crc-fast:
    - fi-apl-guc:         NOTRUN -> [SKIP][7] ([fdo#109271] / [fdo#111827]) +7 similar issues
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/fi-apl-guc/igt@kms_chamelium@hdmi-crc-fast.html

  * igt@kms_force_connector_basic@force-connector-state:
    - fi-apl-guc:         NOTRUN -> [SKIP][8] ([fdo#109271]) +12 similar issues
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/fi-apl-guc/igt@kms_force_connector_basic@force-connector-state.html

  * igt@prime_vgem@basic-userptr:
    - fi-cfl-8109u:       NOTRUN -> [SKIP][9] ([fdo#109271]) +9 similar issues
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/fi-cfl-8109u/igt@prime_vgem@basic-userptr.html

  
#### Possible fixes ####

  * igt@i915_selftest@live@migrate:
    - {bat-dg2-11}:       [DMESG-WARN][10] ([i915#7359]) -> [PASS][11]
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_12423/bat-dg2-11/igt@i915_selftest@live@migrate.html
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/bat-dg2-11/igt@i915_selftest@live@migrate.html
    - {bat-adlp-6}:       [INCOMPLETE][12] ([i915#7348]) -> [PASS][13]
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_12423/bat-adlp-6/igt@i915_selftest@live@migrate.html
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/bat-adlp-6/igt@i915_selftest@live@migrate.html

  * igt@i915_selftest@live@reset:
    - {bat-rpls-1}:       [DMESG-FAIL][14] ([i915#4983]) -> [PASS][15]
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_12423/bat-rpls-1/igt@i915_selftest@live@reset.html
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/bat-rpls-1/igt@i915_selftest@live@reset.html

  * igt@i915_selftest@live@slpc:
    - {bat-adln-1}:       [DMESG-FAIL][16] ([i915#6997]) -> [PASS][17]
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_12423/bat-adln-1/igt@i915_selftest@live@slpc.html
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/bat-adln-1/igt@i915_selftest@live@slpc.html

  
#### Warnings ####

  * igt@i915_suspend@basic-s3-without-i915:
    - fi-rkl-11600:       [FAIL][18] ([fdo#103375]) -> [INCOMPLETE][19] ([i915#4817])
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_12423/fi-rkl-11600/igt@i915_suspend@basic-s3-without-i915.html
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/fi-rkl-11600/igt@i915_suspend@basic-s3-without-i915.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#103375]: https://bugs.freedesktop.org/show_bug.cgi?id=103375
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#111827]: https://bugs.freedesktop.org/show_bug.cgi?id=111827
  [i915#1845]: https://gitlab.freedesktop.org/drm/intel/issues/1845
  [i915#2190]: https://gitlab.freedesktop.org/drm/intel/issues/2190
  [i915#4613]: https://gitlab.freedesktop.org/drm/intel/issues/4613
  [i915#4817]: https://gitlab.freedesktop.org/drm/intel/issues/4817
  [i915#4983]: https://gitlab.freedesktop.org/drm/intel/issues/4983
  [i915#5334]: https://gitlab.freedesktop.org/drm/intel/issues/5334
  [i915#6367]: https://gitlab.freedesktop.org/drm/intel/issues/6367
  [i915#6997]: https://gitlab.freedesktop.org/drm/intel/issues/6997
  [i915#7073]: https://gitlab.freedesktop.org/drm/intel/issues/7073
  [i915#7348]: https://gitlab.freedesktop.org/drm/intel/issues/7348
  [i915#7359]: https://gitlab.freedesktop.org/drm/intel/issues/7359


Build changes
-------------

  * Linux: CI_DRM_12423 -> Patchwork_111259v1

  CI-20190529: 20190529
  CI_DRM_12423: 1faa699c29da496684f8067db4859f352421ce71 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_7072: 69ba7163475925cdc69aebbdfa0e87453ae165c7 @ https://gitlab.freedesktop.org/drm/igt-gpu-tools.git
  Patchwork_111259v1: 1faa699c29da496684f8067db4859f352421ce71 @ git://anongit.freedesktop.org/gfx-ci/linux


### Linux commits

be6d33c4bf69 xhci: Convert to use list_count()
9db9c0963e4a usb: gadget: udc: bcm63xx: Convert to use list_count()
d3a42bc3ca66 usb: gadget: hid: Convert to use list_count()
ae468200324c i915: Move list_count() to list.h for broader use

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_111259v1/index.html

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