Merge branch 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers into asm-generic

Patches from David Howells <dhowells@redhat.com>:

This is to complete part of the UAPI disintegration for which the
preparatory patches were pulled recently.

Note that there are some fixup patches which are at the base of the
branch aimed at you, plus all arches get the asm-generic branch merged in too.

* 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers:
  UAPI: (Scripted) Disintegrate include/asm-generic
  UAPI: Fix conditional header installation handling (notably kvm_para.h on m68k)
  c6x: remove c6x signal.h
  UAPI: Split compound conditionals containing __KERNEL__ in Arm64
  UAPI: Fix the guards on various asm/unistd.h files

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 74 insertions, 28 deletions

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index de0213c9d11c..5d6c71edc739 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1773,56 +1773,102 @@ static void gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 	}
 }
 
-static int gpiolib_show(struct seq_file *s, void *unused)
+static void *gpiolib_seq_start(struct seq_file *s, loff_t *pos)
 {
-	struct gpio_chip	*chip = NULL;
-	unsigned		gpio;
-	int			started = 0;
+	struct gpio_chip *chip = NULL;
+	unsigned int gpio;
+	void *ret = NULL;
+	loff_t index = 0;
 
 	/* REVISIT this isn't locked against gpio_chip removal ... */
 
 	for (gpio = 0; gpio_is_valid(gpio); gpio++) {
-		struct device *dev;
-
-		if (chip == gpio_desc[gpio].chip)
+		if (gpio_desc[gpio].chip == chip)
 			continue;
+
 		chip = gpio_desc[gpio].chip;
 		if (!chip)
 			continue;
 
-		seq_printf(s, "%sGPIOs %d-%d",
-				started ? "\n" : "",
-				chip->base, chip->base + chip->ngpio - 1);
-		dev = chip->dev;
-		if (dev)
-			seq_printf(s, ", %s/%s",
-				dev->bus ? dev->bus->name : "no-bus",
-				dev_name(dev));
-		if (chip->label)
-			seq_printf(s, ", %s", chip->label);
-		if (chip->can_sleep)
-			seq_printf(s, ", can sleep");
-		seq_printf(s, ":\n");
-
-		started = 1;
-		if (chip->dbg_show)
-			chip->dbg_show(s, chip);
-		else
-			gpiolib_dbg_show(s, chip);
+		if (index++ >= *pos) {
+			ret = chip;
+			break;
+		}
 	}
+
+	s->private = "";
+
+	return ret;
+}
+
+static void *gpiolib_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+	struct gpio_chip *chip = v;
+	unsigned int gpio;
+	void *ret = NULL;
+
+	/* skip GPIOs provided by the current chip */
+	for (gpio = chip->base + chip->ngpio; gpio_is_valid(gpio); gpio++) {
+		chip = gpio_desc[gpio].chip;
+		if (chip) {
+			ret = chip;
+			break;
+		}
+	}
+
+	s->private = "\n";
+	++*pos;
+
+	return ret;
+}
+
+static void gpiolib_seq_stop(struct seq_file *s, void *v)
+{
+}
+
+static int gpiolib_seq_show(struct seq_file *s, void *v)
+{
+	struct gpio_chip *chip = v;
+	struct device *dev;
+
+	seq_printf(s, "%sGPIOs %d-%d", (char *)s->private,
+			chip->base, chip->base + chip->ngpio - 1);
+	dev = chip->dev;
+	if (dev)
+		seq_printf(s, ", %s/%s", dev->bus ? dev->bus->name : "no-bus",
+			dev_name(dev));
+	if (chip->label)
+		seq_printf(s, ", %s", chip->label);
+	if (chip->can_sleep)
+		seq_printf(s, ", can sleep");
+	seq_printf(s, ":\n");
+
+	if (chip->dbg_show)
+		chip->dbg_show(s, chip);
+	else
+		gpiolib_dbg_show(s, chip);
+
 	return 0;
 }
 
+static const struct seq_operations gpiolib_seq_ops = {
+	.start = gpiolib_seq_start,
+	.next = gpiolib_seq_next,
+	.stop = gpiolib_seq_stop,
+	.show = gpiolib_seq_show,
+};
+
 static int gpiolib_open(struct inode *inode, struct file *file)
 {
-	return single_open(file, gpiolib_show, NULL);
+	return seq_open(file, &gpiolib_seq_ops);
 }
 
 static const struct file_operations gpiolib_operations = {
+	.owner		= THIS_MODULE,
 	.open		= gpiolib_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= single_release,
+	.release	= seq_release,
 };
 
 static int __init gpiolib_debugfs_init(void)