simple_open: automatically convert to simple_open()

Many users of debugfs copy the implementation of default_open() when
they want to support a custom read/write function op.  This leads to a
proliferation of the default_open() implementation across the entire
tree.

Now that the common implementation has been consolidated into libfs we
can replace all the users of this function with simple_open().

This replacement was done with the following semantic patch:

<smpl>
@ open @
identifier open_f != simple_open;
identifier i, f;
@@
-int open_f(struct inode *i, struct file *f)
-{
(
-if (i->i_private)
-f->private_data = i->i_private;
|
-f->private_data = i->i_private;
)
-return 0;
-}

@ has_open depends on open @
identifier fops;
identifier open.open_f;
@@
struct file_operations fops = {
...
-.open = open_f,
+.open = simple_open,
...
};
</smpl>

[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

63 files changed, 176 insertions, 572 deletions

diff --git a/arch/arm/mach-msm/smd_debug.c b/arch/arm/mach-msm/smd_debug.c
index 0c56a5aaf58..c56df9e932a 100644
--- a/arch/arm/mach-msm/smd_debug.c
+++ b/arch/arm/mach-msm/smd_debug.c
@@ -203,15 +203,9 @@ static ssize_t debug_read(struct file *file, char __user *buf,
 	return simple_read_from_buffer(buf, count, ppos, debug_buffer, bsize);
 }
 
-static int debug_open(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-	return 0;
-}
-
 static const struct file_operations debug_ops = {
 	.read = debug_read,
-	.open = debug_open,
+	.open = simple_open,
 	.llseek = default_llseek,
 };
 
diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
index 90fcf62854b..1d5d31ea686 100644
--- a/arch/x86/kernel/kdebugfs.c
+++ b/arch/x86/kernel/kdebugfs.c
@@ -68,16 +68,9 @@ static ssize_t setup_data_read(struct file *file, char __user *user_buf,
 	return count;
 }
 
-static int setup_data_open(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-
-	return 0;
-}
-
 static const struct file_operations fops_setup_data = {
 	.read		= setup_data_read,
-	.open		= setup_data_open,
+	.open		= simple_open,
 	.llseek		= default_llseek,
 };
 
diff --git a/drivers/acpi/ec_sys.c b/drivers/acpi/ec_sys.c
index b258cab9061..7586544fddb 100644
--- a/drivers/acpi/ec_sys.c
+++ b/drivers/acpi/ec_sys.c
@@ -27,12 +27,6 @@ MODULE_PARM_DESC(write_support, "Dangerous, reboot and removal of battery may "
 
 static struct dentry *acpi_ec_debugfs_dir;
 
-static int acpi_ec_open_io(struct inode *i, struct file *f)
-{
-	f->private_data = i->i_private;
-	return 0;
-}
-
 static ssize_t acpi_ec_read_io(struct file *f, char __user *buf,
 			       size_t count, loff_t *off)
 {
@@ -95,7 +89,7 @@ static ssize_t acpi_ec_write_io(struct file *f, const char __user *buf,
 
 static const struct file_operations acpi_ec_io_ops = {
 	.owner = THIS_MODULE,
-	.open  = acpi_ec_open_io,
+	.open  = simple_open,
 	.read  = acpi_ec_read_io,
 	.write = acpi_ec_write_io,
 	.llseek = default_llseek,
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 58517a5dac1..251eb70f83e 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -27,12 +27,6 @@ static size_t regmap_calc_reg_len(int max_val, char *buf, size_t buf_size)
 	return strlen(buf);
 }
 
-static int regmap_open_file(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-	return 0;
-}
-
 static ssize_t regmap_name_read_file(struct file *file,
 				     char __user *user_buf, size_t count,
 				     loff_t *ppos)
@@ -57,7 +51,7 @@ static ssize_t regmap_name_read_file(struct file *file,
 }
 
 static const struct file_operations regmap_name_fops = {
-	.open = regmap_open_file,
+	.open = simple_open,
 	.read = regmap_name_read_file,
 	.llseek = default_llseek,
 };
@@ -174,7 +168,7 @@ static ssize_t regmap_map_write_file(struct file *file,
 #endif
 
 static const struct file_operations regmap_map_fops = {
-	.open = regmap_open_file,
+	.open = simple_open,
 	.read = regmap_map_read_file,
 	.write = regmap_map_write_file,
 	.llseek = default_llseek,
@@ -243,7 +237,7 @@ out:
 }
 
 static const struct file_operations regmap_access_fops = {
-	.open = regmap_open_file,
+	.open = simple_open,
 	.read = regmap_access_read_file,
 	.llseek = default_llseek,
 };
diff --git a/drivers/bluetooth/btmrvl_debugfs.c b/drivers/bluetooth/btmrvl_debugfs.c
index 6c20bbb54b7..428dbb7574b 100644
--- a/drivers/bluetooth/btmrvl_debugfs.c
+++ b/drivers/bluetooth/btmrvl_debugfs.c
@@ -45,12 +45,6 @@ struct btmrvl_debugfs_data {
 	struct dentry *txdnldready;
 };
 
-static int btmrvl_open_generic(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-	return 0;
-}
-
 static ssize_t btmrvl_hscfgcmd_write(struct file *file,
 			const char __user *ubuf, size_t count, loff_t *ppos)
 {
@@ -93,7 +87,7 @@ static ssize_t btmrvl_hscfgcmd_read(struct file *file, char __user *userbuf,
 static const struct file_operations btmrvl_hscfgcmd_fops = {
 	.read	= btmrvl_hscfgcmd_read,
 	.write	= btmrvl_hscfgcmd_write,
-	.open	= btmrvl_open_generic,
+	.open	= simple_open,
 	.llseek = default_llseek,
 };
 
@@ -134,7 +128,7 @@ static ssize_t btmrvl_psmode_read(struct file *file, char __user *userbuf,
 static const struct file_operations btmrvl_psmode_fops = {
 	.read	= btmrvl_psmode_read,
 	.write	= btmrvl_psmode_write,
-	.open	= btmrvl_open_generic,
+	.open	= simple_open,
 	.llseek = default_llseek,
 };
 
@@ -180,7 +174,7 @@ static ssize_t btmrvl_pscmd_read(struct file *file, char __user *userbuf,
 static const struct file_operations btmrvl_pscmd_fops = {
 	.read = btmrvl_pscmd_read,
 	.write = btmrvl_pscmd_write,
-	.open = btmrvl_open_generic,
+	.open = simple_open,
 	.llseek = default_llseek,
 };
 
@@ -221,7 +215,7 @@ static ssize_t btmrvl_gpiogap_read(struct file *file, char __user *userbuf,
 static const struct file_operations btmrvl_gpiogap_fops = {
 	.read	= btmrvl_gpiogap_read,
 	.write	= btmrvl_gpiogap_write,
-	.open	= btmrvl_open_generic,
+	.open	= simple_open,
 	.llseek = default_llseek,
 };
 
@@ -265,7 +259,7 @@ static ssize_t btmrvl_hscmd_read(struct file *file, char __user *userbuf,
 static const struct file_operations btmrvl_hscmd_fops = {
 	.read	= btmrvl_hscmd_read,
 	.write	= btmrvl_hscmd_write,
-	.open	= btmrvl_open_generic,
+	.open	= simple_open,
 	.llseek = default_llseek,
 };
 
@@ -305,7 +299,7 @@ static ssize_t btmrvl_hsmode_read(struct file *file, char __user * userbuf,
 static const struct file_operations btmrvl_hsmode_fops = {
 	.read	= btmrvl_hsmode_read,
 	.write	= btmrvl_hsmode_write,
-	.open	= btmrvl_open_generic,
+	.open	= simple_open,
 	.llseek = default_llseek,
 };
 
@@ -323,7 +317,7 @@ static ssize_t btmrvl_curpsmode_read(struct file *file, char __user *userbuf,
 
 static const struct file_operations btmrvl_curpsmode_fops = {
 	.read	= btmrvl_curpsmode_read,
-	.open	= btmrvl_open_generic,
+	.open	= simple_open,
 	.llseek = default_llseek,
 };
 
@@ -341,7 +335,7 @@ static ssize_t btmrvl_psstate_read(struct file *file, char __user * userbuf,
 
 static const struct file_operations btmrvl_psstate_fops = {
 	.read	= btmrvl_psstate_read,
-	.open	= btmrvl_open_generic,
+	.open	= simple_open,
 	.llseek = default_llseek,
 };
 
@@ -359,7 +353,7 @@ static ssize_t btmrvl_hsstate_read(struct file *file, char __user *userbuf,
 
 static const struct file_operations btmrvl_hsstate_fops = {
 	.read	= btmrvl_hsstate_read,
-	.open	= btmrvl_open_generic,
+	.open	= simple_open,
 	.llseek = default_llseek,
 };
 
@@ -378,7 +372,7 @@ static ssize_t btmrvl_txdnldready_read(struct file *file, char __user *userbuf,
 
 static const struct file_operations btmrvl_txdnldready_fops = {
 	.read	= btmrvl_txdnldready_read,
-	.open	= btmrvl_open_generic,
+	.open	= simple_open,
 	.llseek = default_llseek,
 };
 
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index b58b5618706..ddf86b6500b 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1038,12 +1038,6 @@ static struct attribute_group port_attribute_group = {
 	.attrs = port_sysfs_entries,
 };
 
-static int debugfs_open(struct inode *inode, struct file *filp)
-{
-	filp->private_data = inode->i_private;
-	return 0;
-}
-
 static ssize_t debugfs_read(struct file *filp, char __user *ubuf,
 			    size_t count, loff_t *offp)
 {
@@ -1087,7 +1081,7 @@ static ssize_t debugfs_read(struct file *filp, char __user *ubuf,
 
 static const struct file_operations port_debugfs_ops = {
 	.owner = THIS_MODULE,
-	.open  = debugfs_open,
+	.open  = simple_open,
 	.read  = debugfs_read,
 };
 
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index d65a718c0f9..a63badcd2d6 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -104,13 +104,6 @@ static void coh901318_list_print(struct coh901318_chan *cohc,
 static struct coh901318_base *debugfs_dma_base;
 static struct dentry *dma_dentry;
 
-static int coh901318_debugfs_open(struct inode *inode, struct file *file)
-{
-
-	file->private_data = inode->i_private;
-	return 0;
-}
-
 static int coh901318_debugfs_read(struct file *file, char __user *buf,
 				  size_t count, loff_t *f_pos)
 {
@@ -158,7 +151,7 @@ static int coh901318_debugfs_read(struct file *file, char __user *buf,
 
 static const struct file_operations coh901318_debugfs_status_operations = {
 	.owner		= THIS_MODULE,
-	.open		= coh901318_debugfs_open,
+	.open		= simple_open,
 	.read		= coh901318_debugfs_read,
 	.llseek		= default_llseek,
 };
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index fdb7ccefffb..b505b70dba0 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1502,14 +1502,6 @@ static int i915_ppgtt_info(struct seq_file *m, void *data)
 	return 0;
 }
 
-static int
-i915_debugfs_common_open(struct inode *inode,
-			 struct file *filp)
-{
-	filp->private_data = inode->i_private;
-	return 0;
-}
-
 static ssize_t
 i915_wedged_read(struct file *filp,
 		 char __user *ubuf,
@@ -1560,7 +1552,7 @@ i915_wedged_write(struct file *filp,
 
 static const struct file_operations i915_wedged_fops = {
 	.owner = THIS_MODULE,
-	.open = i915_debugfs_common_open,
+	.open = simple_open,
 	.read = i915_wedged_read,
 	.write = i915_wedged_write,
 	.llseek = default_llseek,
@@ -1622,7 +1614,7 @@ i915_max_freq_write(struct file *filp,
 
 static const struct file_operations i915_max_freq_fops = {
 	.owner = THIS_MODULE,
-	.open = i915_debugfs_common_open,
+	.open = simple_open,
 	.read = i915_max_freq_read,
 	.write = i915_max_freq_write,
 	.llseek = default_llseek,
@@ -1693,7 +1685,7 @@ i915_cache_sharing_write(struct file *filp,
 
 static const struct file_operations i915_cache_sharing_fops = {
 	.owner = THIS_MODULE,
-	.open = i915_debugfs_common_open,
+	.open = simple_open,
 	.read = i915_cache_sharing_read,
 	.write = i915_cache_sharing_write,
 	.llseek = default_llseek,
diff --git a/drivers/hid/hid-picolcd.c b/drivers/hid/hid-picolcd.c
index 12f9777c385..45c3433f798 100644
--- a/drivers/hid/hid-picolcd.c
+++ b/drivers/hid/hid-picolcd.c
@@ -1525,12 +1525,6 @@ static const struct file_operations picolcd_debug_reset_fops = {
 /*
  * The "eeprom" file
  */
-static int picolcd_debug_eeprom_open(struct inode *i, struct file *f)
-{
-	f->private_data = i->i_private;
-	return 0;
-}
-
 static ssize_t picolcd_debug_eeprom_read(struct file *f, char __user *u,
 		size_t s, loff_t *off)
 {
@@ -1618,7 +1612,7 @@ static ssize_t picolcd_debug_eeprom_write(struct file *f, const char __user *u,
  */
 static const struct file_operations picolcd_debug_eeprom_fops = {
 	.owner    = THIS_MODULE,
-	.open     = picolcd_debug_eeprom_open,
+	.open     = simple_open,
 	.read     = picolcd_debug_eeprom_read,
 	.write    = picolcd_debug_eeprom_write,
 	.llseek   = generic_file_llseek,
@@ -1627,12 +1621,6 @@ static const struct file_operations picolcd_debug_eeprom_fops = {
 /*
  * The "flash" file
  */
-static int picolcd_debug_flash_open(struct inode *i, struct file *f)
-{
-	f->private_data = i->i_private;
-	return 0;
-}
-
 /* record a flash address to buf (bounds check to be done by caller) */
 static int _picolcd_flash_setaddr(struct picolcd_data *data, u8 *buf, long off)
 {
@@ -1817,7 +1805,7 @@ static ssize_t picolcd_debug_flash_write(struct file *f, const char __user *u,
  */
 static const struct file_operations picolcd_debug_flash_fops = {
 	.owner    = THIS_MODULE,
-	.open     = picolcd_debug_flash_open,
+	.open     = simple_open,
 	.read     = picolcd_debug_flash_read,
 	.write    = picolcd_debug_flash_write,
 	.llseek   = generic_file_llseek,
diff --git a/drivers/hid/hid-wiimote-debug.c b/drivers/hid/hid-wiimote-debug.c
index 17dabc1f339..eec329197c1 100644
--- a/drivers/hid/hid-wiimote-debug.c
+++ b/drivers/hid/hid-wiimote-debug.c
@@ -23,12 +23,6 @@ struct wiimote_debug {
 	struct dentry *drm;
 };
 
-static int wiidebug_eeprom_open(struct inode *i, struct file *f)
-{
-	f->private_data = i->i_private;
-	return 0;
-}
-
 static ssize_t wiidebug_eeprom_read(struct file *f, char __user *u, size_t s,
 								loff_t *off)
 {
@@ -83,7 +77,7 @@ static ssize_t wiidebug_eeprom_read(struct file *f, char __user *u, size_t s,
 
 static const struct file_operations wiidebug_eeprom_fops = {
 	.owner = THIS_MODULE,
-	.open = wiidebug_eeprom_open,
+	.open = simple_open,
 	.read = wiidebug_eeprom_read,
 	.llseek = generic_file_llseek,
 };
diff --git a/drivers/idle/i7300_idle.c b/drivers/idle/i7300_idle.c
index c976285d313..fa080ebd568 100644
--- a/drivers/idle/i7300_idle.c
+++ b/drivers/idle/i7300_idle.c
@@ -516,12 +516,6 @@ static struct notifier_block i7300_idle_nb = {
 
 MODULE_DEVICE_TABLE(pci, pci_tbl);
 
-int stats_open_generic(struct inode *inode, struct file *fp)
-{
-	fp->private_data = inode->i_private;
-	return 0;
-}
-
 static ssize_t stats_read_ul(struct file *fp, char __user *ubuf, size_t count,
 				loff_t *off)
 {
@@ -534,7 +528,7 @@ static ssize_t stats_read_ul(struct file *fp, char __user *ubuf, size_t count,
 }
 
 static const struct file_operations idle_fops = {
-	.open	= stats_open_generic,
+	.open	= simple_open,
 	.read	= stats_read_ul,
 	.llseek = default_llseek,
 };
diff --git a/drivers/iommu/omap-iommu-debug.c b/drivers/iommu/omap-iommu-debug.c
index 103dbd92e25..f55fc5dfbad 100644
--- a/drivers/iommu/omap-iommu-debug.c
+++ b/drivers/iommu/omap-iommu-debug.c
@@ -323,15 +323,9 @@ err_out:
 	return count;
 }
 
-static int debug_open_generic(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-	return 0;
-}
-
 #define DEBUG_FOPS(name)						\
 	static const struct file_operations debug_##name##_fops = {	\
-		.open = debug_open_generic,				\
+		.open = simple_open,					\
 		.read = debug_read_##name,				\
 		.write = debug_write_##name,				\
 		.llseek = generic_file_llseek,				\
@@ -339,7 +333,7 @@ static int debug_open_generic(struct inode *inode, struct file *file)
 
 #define DEBUG_FOPS_RO(name)						\
 	static const struct file_operations debug_##name##_fops = {	\
-		.open = debug_open_generic,				\
+		.open = simple_open,					\
 		.read = debug_read_##name,				\
 		.llseek = generic_file_llseek,				\
 	};
diff --git a/drivers/mfd/aat2870-core.c b/drivers/mfd/aat2870-core.c
index 3aa36eb5c79..44a3fdbadef 100644
--- a/drivers/mfd/aat2870-core.c
+++ b/drivers/mfd/aat2870-core.c
@@ -262,13 +262,6 @@ static ssize_t aat2870_dump_reg(struct aat2870_data *aat2870, char *buf)
 	return count;
 }
 
-static int aat2870_reg_open_file(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-
-	return 0;
-}
-
 static ssize_t aat2870_reg_read_file(struct file *file, char __user *user_buf,
 				     size_t count, loff_t *ppos)
 {
@@ -330,7 +323,7 @@ static ssize_t aat2870_reg_write_file(struct file *file,
 }
 
 static const struct file_operations aat2870_reg_fops = {
-	.open = aat2870_reg_open_file,
+	.open = simple_open,
 	.read = aat2870_reg_read_file,
 	.write = aat2870_reg_write_file,
 };
diff --git a/drivers/mfd/ab3100-core.c b/drivers/mfd/ab3100-core.c
index 60107ee166f..1efad20fb17 100644
--- a/drivers/mfd/ab3100-core.c
+++ b/drivers/mfd/ab3100-core.c
@@ -483,12 +483,6 @@ struct ab3100_get_set_reg_priv {
 	bool mode;
 };
 
-static int ab3100_get_set_reg_open_file(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-	return 0;
-}
-
 static ssize_t ab3100_get_set_reg(struct file *file,
 				  const char __user *user_buf,
 				  size_t count, loff_t *ppos)
@@ -583,7 +577,7 @@ static ssize_t ab3100_get_set_reg(struct file *file,
 }
 
 static const struct file_operations ab3100_get_set_reg_fops = {
-	.open = ab3100_get_set_reg_open_file,
+	.open = simple_open,
 	.write = ab3100_get_set_reg,
 	.llseek = noop_llseek,
 };
diff --git a/drivers/misc/ibmasm/ibmasmfs.c b/drivers/misc/ibmasm/ibmasmfs.c
index 1c034b80d40..6673e578b3e 100644
--- a/drivers/misc/ibmasm/ibmasmfs.c
+++ b/drivers/misc/ibmasm/ibmasmfs.c
@@ -500,12 +500,6 @@ static ssize_t r_heartbeat_file_write(struct file *file, const char __user *buf,
 	return 1;
 }
 
-static int remote_settings_file_open(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-	return 0;
-}
-
 static int remote_settings_file_close(struct inode *inode, struct file *file)
 {
 	return 0;
@@ -600,7 +594,7 @@ static const struct file_operations r_heartbeat_fops = {
 };
 
 static const struct file_operations remote_settings_fops = {
-	.open =		remote_settings_file_open,
+	.open =		simple_open,
 	.release =	remote_settings_file_close,
 	.read =		remote_settings_file_read,
 	.write =	remote_settings_file_write,
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index e2cdebf4084..61af9bb560a 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -386,19 +386,11 @@ out:
 	return count;
 }
 
-static int default_open(struct inode *inode, struct file *file)
-{