[PATCH RFC] fs: introduce a default_open for simple f_op->open use
From: H Hartley Sweeten
Date: Thu Jun 02 2011 - 18:05:28 EST
There are many f_op->open implementations that simply do:
file->private_data = inode->i_private;
This introduces a new global symbol, default_open, that can be
used instead of the private implementations.
This also removes a couple private implementations that share the
same symbol name.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <matthew@xxxxxx>
Cc: Artem Bityutskiy <dedekind1@xxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: Robert Richter <robert.richter@xxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: James Morris <jmorris@xxxxxxxxx>
Cc: Nick Piggin <npiggin@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Dave Chinner <dchinner@xxxxxxxxxx>
---
If this patch looks reasonable, I have some additional patches that
convert all other similar f_op->open implemenations to use default_open
tree wide. The full diffstat looks like this:
arch/arm/mach-msm/smd_debug.c | 8 +-----
arch/arm/plat-mxc/audmux-v2.c | 8 +-----
arch/arm/plat-omap/iommu-debug.c | 10 +------
arch/x86/kernel/kdebugfs.c | 9 +------
drivers/acpi/ec_sys.c | 8 +-----
drivers/bluetooth/btmrvl_debugfs.c | 26 +++++++------------
drivers/char/virtio_console.c | 8 +-----
drivers/dma/coh901318.c | 9 +------
drivers/gpu/drm/i915/i915_debugfs.c | 10 +------
drivers/hid/hid-picolcd.c | 15 +---------
drivers/idle/i7300_idle.c | 8 +-----
drivers/mfd/ab3100-core.c | 8 +-----
drivers/misc/ibmasm/ibmasmfs.c | 10 +------
drivers/mtd/ubi/debug.c | 8 ------
drivers/net/caif/caif_spi.c | 10 +------
drivers/net/cxgb4/cxgb4_main.c | 8 +-----
drivers/net/wimax/i2400m/debugfs.c | 14 +---------
drivers/net/wireless/ath/ath5k/debug.c | 23 ++++++-----------
drivers/net/wireless/ath/ath9k/debug.c | 32 +++++++++--------------
drivers/net/wireless/ath/ath9k/htc_drv_debug.c | 26 +++++++------------
drivers/net/wireless/ath/ath9k/rc.c | 8 +-----
drivers/net/wireless/ath/carl9170/debug.c | 8 +-----
drivers/net/wireless/b43/debugfs.c | 8 +-----
drivers/net/wireless/b43legacy/debugfs.c | 8 +-----
drivers/net/wireless/iwlegacy/iwl-3945-rs.c | 8 +-----
drivers/net/wireless/iwlegacy/iwl-4965-rs.c | 11 ++------
drivers/net/wireless/iwlegacy/iwl-debugfs.c | 13 ++-------
drivers/net/wireless/iwlwifi/iwl-agn-rs.c | 11 ++------
drivers/net/wireless/iwlwifi/iwl-debugfs.c | 12 ++------
drivers/net/wireless/iwmc3200wifi/debugfs.c | 15 +++--------
drivers/net/wireless/iwmc3200wifi/sdio.c | 8 +-----
drivers/net/wireless/libertas/debugfs.c | 10 +------
drivers/net/wireless/mwifiex/debugfs.c | 18 ++-----------
drivers/net/wireless/wl1251/debugfs.c | 14 +++-------
drivers/net/wireless/wl12xx/debugfs.c | 22 ++++++----------
drivers/oprofile/oprofilefs.c | 8 ------
drivers/spi/dw_spi.c | 7 +----
drivers/tty/serial/mfd.c | 10 +------
drivers/usb/core/inode.c | 8 ------
drivers/usb/host/ehci-dbg.c | 9 +------
drivers/uwb/uwb-debug.c | 9 +------
fs/debugfs/file.c | 8 ------
fs/dlm/debug_fs.c | 8 +-----
fs/open.c | 7 +++++
fs/pstore/inode.c | 8 +-----
include/linux/fs.h | 1 +
kernel/trace/blktrace.c | 18 +------------
net/mac80211/debugfs.c | 20 +++++---------
net/mac80211/debugfs.h | 1 -
net/mac80211/debugfs_key.c | 4 +-
net/mac80211/debugfs_netdev.c | 2 +-
net/mac80211/debugfs_sta.c | 4 +-
net/mac80211/rate.c | 2 +-
net/wireless/debugfs.c | 10 +------
security/inode.c | 8 ------
sound/soc/soc-core.c | 8 +-----
sound/soc/soc-dapm.c | 16 +----------
57 files changed, 135 insertions(+), 473 deletions(-)
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index ab80c0d..edc2ebd 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -386,14 +386,6 @@ out:
return count;
}
-static int default_open(struct inode *inode, struct file *file)
-{
- if (inode->i_private)
- file->private_data = inode->i_private;
-
- return 0;
-}
-
/* File operations for all UBI debugfs files */
static const struct file_operations dfs_fops = {
.read = dfs_file_read,
diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c
index e9ff6f7..7cf1e17 100644
--- a/drivers/oprofile/oprofilefs.c
+++ b/drivers/oprofile/oprofilefs.c
@@ -110,14 +110,6 @@ static ssize_t ulong_write_file(struct file *file, char const __user *buf, size_
}
-static int default_open(struct inode *inode, struct file *filp)
-{
- if (inode->i_private)
- filp->private_data = inode->i_private;
- return 0;
-}
-
-
static const struct file_operations ulong_fops = {
.read = ulong_read_file,
.write = ulong_write_file,
diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index 1b125c2..9451609 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -432,14 +432,6 @@ static loff_t default_file_lseek (struct file *file, loff_t offset, int orig)
return retval;
}
-static int default_open (struct inode *inode, struct file *file)
-{
- if (inode->i_private)
- file->private_data = inode->i_private;
-
- return 0;
-}
-
static const struct file_operations default_file_operations = {
.read = default_read_file,
.write = default_write_file,
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 90f7657..e9ce142 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -31,14 +31,6 @@ static ssize_t default_write_file(struct file *file, const char __user *buf,
return count;
}
-static int default_open(struct inode *inode, struct file *file)
-{
- if (inode->i_private)
- file->private_data = inode->i_private;
-
- return 0;
-}
-
const struct file_operations debugfs_file_operations = {
.read = default_read_file,
.write = default_write_file,
diff --git a/fs/open.c b/fs/open.c
index b52cf01..64039ee 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -666,6 +666,13 @@ static inline int __get_file_write_access(struct inode *inode,
return error;
}
+int default_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+EXPORT_SYMBOL(default_open);
+
static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
struct file *f,
int (*open)(struct inode *, struct file *),
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c55d6b7..28a0720 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1989,6 +1989,7 @@ extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
struct file *filp);
extern int do_fallocate(struct file *file, int mode, loff_t offset,
loff_t len);
+extern int default_open(struct inode *inode, struct file *file);
extern long do_sys_open(int dfd, const char __user *filename, int flags,
int mode);
extern struct file *filp_open(const char *, int, int);
diff --git a/security/inode.c b/security/inode.c
index c4df2fb..af659c2 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -41,14 +41,6 @@ static ssize_t default_write_file(struct file *file, const char __user *buf,
return count;
}
-static int default_open(struct inode *inode, struct file *file)
-{
- if (inode->i_private)
- file->private_data = inode->i_private;
-
- return 0;
-}
-
static const struct file_operations default_file_ops = {
.read = default_read_file,
.write = default_write_file,
--
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