#ifndef _LINUX_DEVFS_FS_KERNEL_H#define _LINUX_DEVFS_FS_KERNEL_H #include <linux/fs.h>#include <linux/config.h>#include <linux/spinlock.h>#include <linux/types.h> #include <asm/semaphore.h> #define DEVFS_SUPER_MAGIC                0x1373 #ifdef CONFIG_DEVFS_FSextern int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...)    __attribute__ ((format(printf, 3, 4)));extern int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...)    __attribute__ ((format(printf, 3, 4)));extern int devfs_mk_symlink(const char *name, const char *link);extern int devfs_mk_dir(const char *fmt, ...)    __attribute__ ((format(printf, 1, 2)));extern void devfs_remove(const char *fmt, ...)    __attribute__ ((format(printf, 1, 2)));extern int devfs_register_tape(const char *name);extern void devfs_unregister_tape(int num);extern void mount_devfs_fs(void);#else				/*  CONFIG_DEVFS_FS  */static inline int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...){	return 0;}static inline int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...){	return 0;}static inline int devfs_mk_symlink(const char *name, const char *link){	return 0;}static inline int devfs_mk_dir(const char *fmt, ...){	return 0;}static inline void devfs_remove(const char *fmt, ...){}static inline int devfs_register_tape(const char *name){	return -1;}static inline void devfs_unregister_tape(int num){}static inline void mount_devfs_fs(void){	return;}#endif				/*  CONFIG_DEVFS_FS  */#endif				/*  _LINUX_DEVFS_FS_KERNEL_H  */