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Diffstat (limited to 'fs/sysfs/file.c')
-rw-r--r--fs/sysfs/file.c82
1 files changed, 38 insertions, 44 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index d2bb7ed8fa74..15ef5eb13663 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -20,7 +20,7 @@
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/limits.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include "sysfs.h"
@@ -45,8 +45,8 @@ struct sysfs_open_dirent {
struct sysfs_buffer {
size_t count;
loff_t pos;
- char * page;
- const struct sysfs_ops * ops;
+ char *page;
+ const struct sysfs_ops *ops;
struct mutex mutex;
int needs_read_fill;
int event;
@@ -59,16 +59,16 @@ struct sysfs_buffer {
* @buffer: data buffer for file.
*
* Allocate @buffer->page, if it hasn't been already, then call the
- * kobject's show() method to fill the buffer with this attribute's
- * data.
+ * kobject's show() method to fill the buffer with this attribute's
+ * data.
* This is called only once, on the file's first read unless an error
* is returned.
*/
-static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer)
+static int fill_read_buffer(struct dentry *dentry, struct sysfs_buffer *buffer)
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- const struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops *ops = buffer->ops;
int ret = 0;
ssize_t count;
@@ -106,7 +106,7 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
}
/**
- * sysfs_read_file - read an attribute.
+ * sysfs_read_file - read an attribute.
* @file: file pointer.
* @buf: buffer to fill.
* @count: number of bytes to read.
@@ -127,12 +127,12 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
static ssize_t
sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
- struct sysfs_buffer * buffer = file->private_data;
+ struct sysfs_buffer *buffer = file->private_data;
ssize_t retval = 0;
mutex_lock(&buffer->mutex);
if (buffer->needs_read_fill || *ppos == 0) {
- retval = fill_read_buffer(file->f_path.dentry,buffer);
+ retval = fill_read_buffer(file->f_path.dentry, buffer);
if (retval)
goto out;
}
@@ -154,9 +154,8 @@ out:
* Allocate @buffer->page if it hasn't been already, then
* copy the user-supplied buffer into it.
*/
-
-static int
-fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t count)
+static int fill_write_buffer(struct sysfs_buffer *buffer,
+ const char __user *buf, size_t count)
{
int error;
@@ -167,7 +166,7 @@ fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t
if (count >= PAGE_SIZE)
count = PAGE_SIZE - 1;
- error = copy_from_user(buffer->page,buf,count);
+ error = copy_from_user(buffer->page, buf, count);
buffer->needs_read_fill = 1;
/* if buf is assumed to contain a string, terminate it by \0,
so e.g. sscanf() can scan the string easily */
@@ -183,16 +182,15 @@ fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t
* @count: number of bytes
*
* Get the correct pointers for the kobject and the attribute we're
- * dealing with, then call the store() method for the attribute,
+ * dealing with, then call the store() method for the attribute,
* passing the buffer that we acquired in fill_write_buffer().
*/
-
-static int
-flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t count)
+static int flush_write_buffer(struct dentry *dentry,
+ struct sysfs_buffer *buffer, size_t count)
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- const struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops *ops = buffer->ops;
int rc;
/* need attr_sd for attr and ops, its parent for kobj */
@@ -219,15 +217,14 @@ flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t
* then push it to the kobject in flush_write_buffer().
* There is no easy way for us to know if userspace is only doing a partial
* write, so we don't support them. We expect the entire buffer to come
- * on the first write.
+ * on the first write.
* Hint: if you're writing a value, first read the file, modify only the
- * the value you're changing, then write entire buffer back.
+ * the value you're changing, then write entire buffer back.
*/
-
-static ssize_t
-sysfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t sysfs_write_file(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- struct sysfs_buffer * buffer = file->private_data;
+ struct sysfs_buffer *buffer = file->private_data;
ssize_t len;
mutex_lock(&buffer->mutex);
@@ -339,13 +336,14 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
if (kobj->ktype && kobj->ktype->sysfs_ops)
ops = kobj->ktype->sysfs_ops;
else {
- WARN(1, KERN_ERR "missing sysfs attribute operations for "
- "kobject: %s\n", kobject_name(kobj));
+ WARN(1, KERN_ERR
+ "missing sysfs attribute operations for kobject: %s\n",
+ kobject_name(kobj));
goto err_out;
}
/* File needs write support.
- * The inode's perms must say it's ok,
+ * The inode's perms must say it's ok,
* and we must have a store method.
*/
if (file->f_mode & FMODE_WRITE) {
@@ -420,7 +418,7 @@ static int sysfs_release(struct inode *inode, struct file *filp)
*/
static unsigned int sysfs_poll(struct file *filp, poll_table *wait)
{
- struct sysfs_buffer * buffer = filp->private_data;
+ struct sysfs_buffer *buffer = filp->private_data;
struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
struct sysfs_open_dirent *od = attr_sd->s_attr.open;
@@ -518,8 +516,9 @@ static int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr,
ns = ops->namespace(kobj, attr);
out:
if (err) {
- WARN(1, KERN_ERR "missing sysfs namespace attribute operation for "
- "kobject: %s\n", kobject_name(kobj));
+ WARN(1, KERN_ERR
+ "missing sysfs namespace attribute operation for kobject: %s\n",
+ kobject_name(kobj));
}
*pns = ns;
return err;
@@ -566,17 +565,17 @@ int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
/**
* sysfs_create_file - create an attribute file for an object.
- * @kobj: object we're creating for.
+ * @kobj: object we're creating for.
* @attr: attribute descriptor.
*/
-
-int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
+int sysfs_create_file(struct kobject *kobj, const struct attribute *attr)
{
BUG_ON(!kobj || !kobj->sd || !attr);
return sysfs_add_file(kobj->sd, attr, SYSFS_KOBJ_ATTR);
}
+EXPORT_SYMBOL_GPL(sysfs_create_file);
int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr)
{
@@ -590,6 +589,7 @@ int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr)
sysfs_remove_file(kobj, ptr[i]);
return err;
}
+EXPORT_SYMBOL_GPL(sysfs_create_files);
/**
* sysfs_add_file_to_group - add an attribute file to a pre-existing group.
@@ -654,7 +654,6 @@ int sysfs_chmod_file(struct kobject *kobj, const struct attribute *attr,
}
EXPORT_SYMBOL_GPL(sysfs_chmod_file);
-
/**
* sysfs_remove_file - remove an object attribute.
* @kobj: object we're acting for.
@@ -662,8 +661,7 @@ EXPORT_SYMBOL_GPL(sysfs_chmod_file);
*
* Hash the attribute name and kill the victim.
*/
-
-void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
+void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr)
{
const void *ns;
@@ -672,13 +670,15 @@ void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
sysfs_hash_and_remove(kobj->sd, ns, attr->name);
}
+EXPORT_SYMBOL_GPL(sysfs_remove_file);
-void sysfs_remove_files(struct kobject * kobj, const struct attribute **ptr)
+void sysfs_remove_files(struct kobject *kobj, const struct attribute **ptr)
{
int i;
for (i = 0; ptr[i]; i++)
sysfs_remove_file(kobj, ptr[i]);
}
+EXPORT_SYMBOL_GPL(sysfs_remove_files);
/**
* sysfs_remove_file_from_group - remove an attribute file from a group.
@@ -793,9 +793,3 @@ int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
return 0;
}
EXPORT_SYMBOL_GPL(sysfs_schedule_callback);
-
-
-EXPORT_SYMBOL_GPL(sysfs_create_file);
-EXPORT_SYMBOL_GPL(sysfs_remove_file);
-EXPORT_SYMBOL_GPL(sysfs_remove_files);
-EXPORT_SYMBOL_GPL(sysfs_create_files);