uint_t IOC_CONVERT_FROM(struct iocblk *iocp);
Solaris DDI Specific (Solaris DDI)
iocp A pointer to the M_IOCTL control structure.
The IOC_CONVERT_FROM macro is used to see if the contents of the current M_IOCTL message had its origin in a different C Language Type Model.
The IOC_CONVERT_FROM() function returns the following values:
IOC_ILP32 This is an LP64 kernel and the M_IOCTL originated in an ILP32 user process.
IOC_NONE The M_IOCTL message uses the same C Language Type Model as this calling module or driver.
The IOC_CONVERT_FROM() macro can be called from user, interrupt, or kernel context.
Writing Device Drivers
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