forked from luck/tmp_suning_uos_patched
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
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@ -55,11 +55,6 @@ static int nvram_open_mode; /* special open modes */
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#define NVRAM_WRITE 1 /* opened for writing (exclusive) */
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#define NVRAM_EXCL 2 /* opened with O_EXCL */
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#ifdef CONFIG_PROC_FS
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static void pc_nvram_proc_read(unsigned char *contents, struct seq_file *seq,
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void *offset);
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#endif
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/*
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* These functions are provided to be called internally or by other parts of
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* the kernel. It's up to the caller to ensure correct checksum before reading
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@ -171,14 +166,14 @@ void nvram_set_checksum(void)
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* The are the file operation function for user access to /dev/nvram
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*/
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static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
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static loff_t nvram_misc_llseek(struct file *file, loff_t offset, int origin)
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{
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return generic_file_llseek_size(file, offset, origin, MAX_LFS_FILESIZE,
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NVRAM_BYTES);
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}
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static ssize_t nvram_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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static ssize_t nvram_misc_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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unsigned char contents[NVRAM_BYTES];
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unsigned i = *ppos;
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@ -206,8 +201,8 @@ static ssize_t nvram_read(struct file *file, char __user *buf,
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return -EIO;
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}
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static ssize_t nvram_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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static ssize_t nvram_misc_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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unsigned char contents[NVRAM_BYTES];
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unsigned i = *ppos;
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@ -245,8 +240,8 @@ static ssize_t nvram_write(struct file *file, const char __user *buf,
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return -EIO;
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}
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static long nvram_ioctl(struct file *file, unsigned int cmd,
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unsigned long arg)
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static long nvram_misc_ioctl(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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int i;
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@ -286,7 +281,7 @@ static long nvram_ioctl(struct file *file, unsigned int cmd,
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}
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}
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static int nvram_open(struct inode *inode, struct file *file)
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static int nvram_misc_open(struct inode *inode, struct file *file)
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{
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spin_lock(&nvram_state_lock);
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@ -308,7 +303,7 @@ static int nvram_open(struct inode *inode, struct file *file)
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return 0;
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}
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static int nvram_release(struct inode *inode, struct file *file)
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static int nvram_misc_release(struct inode *inode, struct file *file)
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{
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spin_lock(&nvram_state_lock);
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@ -325,87 +320,6 @@ static int nvram_release(struct inode *inode, struct file *file)
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return 0;
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}
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#ifndef CONFIG_PROC_FS
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static int nvram_add_proc_fs(void)
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{
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return 0;
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}
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#else
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static int nvram_proc_read(struct seq_file *seq, void *offset)
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{
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unsigned char contents[NVRAM_BYTES];
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int i = 0;
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spin_lock_irq(&rtc_lock);
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for (i = 0; i < NVRAM_BYTES; ++i)
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contents[i] = __nvram_read_byte(i);
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spin_unlock_irq(&rtc_lock);
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pc_nvram_proc_read(contents, seq, offset);
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return 0;
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}
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static int nvram_add_proc_fs(void)
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{
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if (!proc_create_single("driver/nvram", 0, NULL, nvram_proc_read))
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return -ENOMEM;
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return 0;
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}
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#endif /* CONFIG_PROC_FS */
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static const struct file_operations nvram_fops = {
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.owner = THIS_MODULE,
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.llseek = nvram_llseek,
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.read = nvram_read,
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.write = nvram_write,
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.unlocked_ioctl = nvram_ioctl,
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.open = nvram_open,
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.release = nvram_release,
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};
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static struct miscdevice nvram_dev = {
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NVRAM_MINOR,
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"nvram",
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&nvram_fops
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};
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static int __init nvram_init(void)
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{
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int ret;
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ret = misc_register(&nvram_dev);
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if (ret) {
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printk(KERN_ERR "nvram: can't misc_register on minor=%d\n",
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NVRAM_MINOR);
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goto out;
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}
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ret = nvram_add_proc_fs();
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if (ret) {
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printk(KERN_ERR "nvram: can't create /proc/driver/nvram\n");
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goto outmisc;
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}
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ret = 0;
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printk(KERN_INFO "Non-volatile memory driver v" NVRAM_VERSION "\n");
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out:
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return ret;
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outmisc:
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misc_deregister(&nvram_dev);
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goto out;
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}
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static void __exit nvram_cleanup_module(void)
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{
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remove_proc_entry("driver/nvram", NULL);
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misc_deregister(&nvram_dev);
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}
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module_init(nvram_init);
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module_exit(nvram_cleanup_module);
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#ifdef CONFIG_PROC_FS
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static const char * const floppy_types[] = {
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@ -483,7 +397,70 @@ static void pc_nvram_proc_read(unsigned char *nvram, struct seq_file *seq,
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return;
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}
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static int nvram_proc_read(struct seq_file *seq, void *offset)
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{
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unsigned char contents[NVRAM_BYTES];
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int i = 0;
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spin_lock_irq(&rtc_lock);
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for (i = 0; i < NVRAM_BYTES; ++i)
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contents[i] = __nvram_read_byte(i);
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spin_unlock_irq(&rtc_lock);
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pc_nvram_proc_read(contents, seq, offset);
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return 0;
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}
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#endif /* CONFIG_PROC_FS */
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static const struct file_operations nvram_misc_fops = {
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.owner = THIS_MODULE,
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.llseek = nvram_misc_llseek,
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.read = nvram_misc_read,
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.write = nvram_misc_write,
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.unlocked_ioctl = nvram_misc_ioctl,
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.open = nvram_misc_open,
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.release = nvram_misc_release,
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};
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static struct miscdevice nvram_misc = {
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NVRAM_MINOR,
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"nvram",
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&nvram_misc_fops,
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};
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static int __init nvram_module_init(void)
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{
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int ret;
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ret = misc_register(&nvram_misc);
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if (ret) {
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pr_err("nvram: can't misc_register on minor=%d\n", NVRAM_MINOR);
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return ret;
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}
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#ifdef CONFIG_PROC_FS
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if (!proc_create_single("driver/nvram", 0, NULL, nvram_proc_read)) {
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pr_err("nvram: can't create /proc/driver/nvram\n");
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misc_deregister(&nvram_misc);
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return -ENOMEM;
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}
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#endif
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pr_info("Non-volatile memory driver v" NVRAM_VERSION "\n");
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return 0;
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}
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static void __exit nvram_module_exit(void)
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{
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#ifdef CONFIG_PROC_FS
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remove_proc_entry("driver/nvram", NULL);
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#endif
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misc_deregister(&nvram_misc);
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}
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module_init(nvram_module_init);
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module_exit(nvram_module_exit);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_MISCDEV(NVRAM_MINOR);
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