root/include/uapi/linux/kdev_t.h

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INCLUDED FROM

#ifndef _UAPI_LINUX_KDEV_T_H
#define _UAPI_LINUX_KDEV_T_H
#ifndef __KERNEL__

/*
Some programs want their definitions of MAJOR and MINOR and MKDEV
from the kernel sources. These must be the externally visible ones.
*/
#define MAJOR(dev)      ((dev)>>8)
#define MINOR(dev)      ((dev) & 0xff)
#define MKDEV(ma,mi)    ((ma)<<8 | (mi))
#endif /* __KERNEL__ */
#endif /* _UAPI_LINUX_KDEV_T_H */
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