[PATCH v8 04/25] char/nvram: Re-order functions to remove forward declarations and #ifdefs
Finn Thain
fthain at telegraphics.com.au
Wed Dec 26 11:37:59 AEDT 2018
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 helps to distinguish them from struct nvram_ops methods.
Signed-off-by: Finn Thain <fthain at telegraphics.com.au>
---
drivers/char/nvram.c | 167 +++++++++++++++++++------------------------
1 file changed, 72 insertions(+), 95 deletions(-)
diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
index a9d4652f9e90..c660cff9faf4 100644
--- a/drivers/char/nvram.c
+++ b/drivers/char/nvram.c
@@ -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);
--
2.19.2
More information about the Linuxppc-dev
mailing list