kdev_t.h File Reference

#include <uapi/linux/kdev_t.h>

Include dependency graph for kdev_t.h:

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Macros
#define	MINORBITS   20
#define	MINORMASK   ((1U << MINORBITS) - 1)
#define	MAJOR(dev)   ((unsigned int) ((dev) >> MINORBITS))
#define	MINOR(dev)   ((unsigned int) ((dev) & MINORMASK))
#define	MKDEV(ma, mi)   (((ma) << MINORBITS) | (mi))
#define	print_dev_t(buffer, dev)    sprintf((buffer), "%u:%u\n", MAJOR(dev), MINOR(dev))
#define	format_dev_t(buffer, dev)

Macro Definition Documentation

format_dev_t

#define format_dev_t	(		buffer,
			dev
	)

Value:

    ({                              \
        sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev));   \
        buffer;                         \
    })

MAJOR

#define MAJOR

(

dev

)

((unsigned int) ((dev) >> MINORBITS))

MINOR

#define MINOR

(

dev

)

((unsigned int) ((dev) & MINORMASK))

MINORBITS

#define MINORBITS   20

MINORMASK

#define MINORMASK   ((1U << MINORBITS) - 1)

MKDEV

#define MKDEV	(		ma,
			mi
	)		(((ma) << MINORBITS) | (mi))

print_dev_t

#define print_dev_t	(		buffer,
			dev
	)		sprintf((buffer), "%u:%u\n", MAJOR(dev), MINOR(dev))