linux - What is the point of magic value? -


what 'magic' value in tty_driver struct

struct tty_driver {    int     magic;          /* magic number structure */    struct kref kref;       /* reference management */    struct cdev cdev;    struct module   *owner;    const char      *driver_name;    ....    .... 

/* tty driver magic number */ #define tty_driver_magic        0x5402

from tty_driver.h listing here.


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