mirror of https://gitee.com/openkylin/linux.git
char/nvram: Re-order functions to remove forward declarations and #ifdefs
Also give functions more sensible names: nvram_misc_* for misc device ops, nvram_proc_* for proc file ops and nvram_module_* for init and exit functions. This prevents name collisions with nvram.h helper functions and improves readability. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Finn Thain
Greg Kroah-Hartman
parent
437ace3777
commit
cb8d8006d4
|
|
@ -55,11 +55,6 @@ static int nvram_open_mode; /* special open modes */
|
|||
#define NVRAM_WRITE 1 /* opened for writing (exclusive) */
|
||||
#define NVRAM_EXCL 2 /* opened with O_EXCL */
|
||||
|
||||
#ifdef CONFIG_PROC_FS
|
||||
static void pc_nvram_proc_read(unsigned char *contents, struct seq_file *seq,
|
||||
void *offset);
|
||||
#endif
|
||||
|
||||
/*
|
||||
* These functions are provided to be called internally or by other parts of
|
||||
* the kernel. It's up to the caller to ensure correct checksum before reading
|
||||
|
|
@ -171,14 +166,14 @@ void nvram_set_checksum(void)
|
|||
* The are the file operation function for user access to /dev/nvram
|
||||
*/
|
||||
|
||||
static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
|
||||
static loff_t nvram_misc_llseek(struct file *file, loff_t offset, int origin)
|
||||
{
|
||||
return generic_file_llseek_size(file, offset, origin, MAX_LFS_FILESIZE,
|
||||
NVRAM_BYTES);
|
||||
}
|
||||
|
||||
static ssize_t nvram_read(struct file *file, char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
static ssize_t nvram_misc_read(struct file *file, char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
unsigned char contents[NVRAM_BYTES];
|
||||
unsigned i = *ppos;
|
||||
|
|
@ -206,8 +201,8 @@ static ssize_t nvram_read(struct file *file, char __user *buf,
|
|||
return -EIO;
|
||||
}
|
||||
|
||||
static ssize_t nvram_write(struct file *file, const char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
static ssize_t nvram_misc_write(struct file *file, const char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
unsigned char contents[NVRAM_BYTES];
|
||||
unsigned i = *ppos;
|
||||
|
|
@ -245,8 +240,8 @@ static ssize_t nvram_write(struct file *file, const char __user *buf,
|
|||
return -EIO;
|
||||
}
|
||||
|
||||
static long nvram_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
static long nvram_misc_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
int i;
|
||||
|
||||
|
|
@ -286,7 +281,7 @@ static long nvram_ioctl(struct file *file, unsigned int cmd,
|
|||
}
|
||||
}
|
||||
|
||||
static int nvram_open(struct inode *inode, struct file *file)
|
||||
static int nvram_misc_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
spin_lock(&nvram_state_lock);
|
||||
|
||||
|
|
@ -308,7 +303,7 @@ static int nvram_open(struct inode *inode, struct file *file)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int nvram_release(struct inode *inode, struct file *file)
|
||||
static int nvram_misc_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
spin_lock(&nvram_state_lock);
|
||||
|
||||
|
|
@ -325,87 +320,6 @@ static int nvram_release(struct inode *inode, struct file *file)
|
|||
return 0;
|
||||
}
|
||||
|
||||
#ifndef CONFIG_PROC_FS
|
||||
static int nvram_add_proc_fs(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
static int nvram_proc_read(struct seq_file *seq, void *offset)
|
||||
{
|
||||
unsigned char contents[NVRAM_BYTES];
|
||||
int i = 0;
|
||||
|
||||
spin_lock_irq(&rtc_lock);
|
||||
for (i = 0; i < NVRAM_BYTES; ++i)
|
||||
contents[i] = __nvram_read_byte(i);
|
||||
spin_unlock_irq(&rtc_lock);
|
||||
|
||||
pc_nvram_proc_read(contents, seq, offset);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nvram_add_proc_fs(void)
|
||||
{
|
||||
if (!proc_create_single("driver/nvram", 0, NULL, nvram_proc_read))
|
||||
return -ENOMEM;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_PROC_FS */
|
||||
|
||||
static const struct file_operations nvram_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = nvram_llseek,
|
||||
.read = nvram_read,
|
||||
.write = nvram_write,
|
||||
.unlocked_ioctl = nvram_ioctl,
|
||||
.open = nvram_open,
|
||||
.release = nvram_release,
|
||||
};
|
||||
|
||||
static struct miscdevice nvram_dev = {
|
||||
NVRAM_MINOR,
|
||||
"nvram",
|
||||
&nvram_fops
|
||||
};
|
||||
|
||||
static int __init nvram_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = misc_register(&nvram_dev);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "nvram: can't misc_register on minor=%d\n",
|
||||
NVRAM_MINOR);
|
||||
goto out;
|
||||
}
|
||||
ret = nvram_add_proc_fs();
|
||||
if (ret) {
|
||||
printk(KERN_ERR "nvram: can't create /proc/driver/nvram\n");
|
||||
goto outmisc;
|
||||
}
|
||||
ret = 0;
|
||||
printk(KERN_INFO "Non-volatile memory driver v" NVRAM_VERSION "\n");
|
||||
out:
|
||||
return ret;
|
||||
outmisc:
|
||||
misc_deregister(&nvram_dev);
|
||||
goto out;
|
||||
}
|
||||
|
||||
static void __exit nvram_cleanup_module(void)
|
||||
{
|
||||
remove_proc_entry("driver/nvram", NULL);
|
||||
misc_deregister(&nvram_dev);
|
||||
}
|
||||
|
||||
module_init(nvram_init);
|
||||
module_exit(nvram_cleanup_module);
|
||||
|
||||
#ifdef CONFIG_PROC_FS
|
||||
|
||||
static const char * const floppy_types[] = {
|
||||
|
|
@ -483,7 +397,70 @@ static void pc_nvram_proc_read(unsigned char *nvram, struct seq_file *seq,
|
|||
return;
|
||||
}
|
||||
|
||||
static int nvram_proc_read(struct seq_file *seq, void *offset)
|
||||
{
|
||||
unsigned char contents[NVRAM_BYTES];
|
||||
int i = 0;
|
||||
|
||||
spin_lock_irq(&rtc_lock);
|
||||
for (i = 0; i < NVRAM_BYTES; ++i)
|
||||
contents[i] = __nvram_read_byte(i);
|
||||
spin_unlock_irq(&rtc_lock);
|
||||
|
||||
pc_nvram_proc_read(contents, seq, offset);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_PROC_FS */
|
||||
|
||||
static const struct file_operations nvram_misc_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = nvram_misc_llseek,
|
||||
.read = nvram_misc_read,
|
||||
.write = nvram_misc_write,
|
||||
.unlocked_ioctl = nvram_misc_ioctl,
|
||||
.open = nvram_misc_open,
|
||||
.release = nvram_misc_release,
|
||||
};
|
||||
|
||||
static struct miscdevice nvram_misc = {
|
||||
NVRAM_MINOR,
|
||||
"nvram",
|
||||
&nvram_misc_fops,
|
||||
};
|
||||
|
||||
static int __init nvram_module_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = misc_register(&nvram_misc);
|
||||
if (ret) {
|
||||
pr_err("nvram: can't misc_register on minor=%d\n", NVRAM_MINOR);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PROC_FS
|
||||
if (!proc_create_single("driver/nvram", 0, NULL, nvram_proc_read)) {
|
||||
pr_err("nvram: can't create /proc/driver/nvram\n");
|
||||
misc_deregister(&nvram_misc);
|
||||
return -ENOMEM;
|
||||
}
|
||||
#endif
|
||||
|
||||
pr_info("Non-volatile memory driver v" NVRAM_VERSION "\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit nvram_module_exit(void)
|
||||
{
|
||||
#ifdef CONFIG_PROC_FS
|
||||
remove_proc_entry("driver/nvram", NULL);
|
||||
#endif
|
||||
misc_deregister(&nvram_misc);
|
||||
}
|
||||
|
||||
module_init(nvram_module_init);
|
||||
module_exit(nvram_module_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_MISCDEV(NVRAM_MINOR);
|
||||
|
|
|
|||
Loading…
Reference in New Issue