new helpers: fdget()/fdput()

		fput(file);

}

struct fd {

	struct file *file;

	int need_put;

};

static inline void fdput(struct fd fd)

{

	if (fd.need_put)

		fput(fd.file);

}

extern struct file *fget(unsigned int fd);

extern struct file *fget_light(unsigned int fd, int *fput_needed);

static inline struct fd fdget(unsigned int fd)

{

	int b;

	struct file *f = fget_light(fd, &b);

	return (struct fd){f,b};

}

static inline struct fd fdget_raw(unsigned int fd)

{

	int b;

	struct file *f = fget_raw_light(fd, &b);

	return (struct fd){f,b};

}

extern struct file *fget_raw(unsigned int fd);

extern struct file *fget_raw_light(unsigned int fd, int *fput_needed);

extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);