drvmunmap releases a mapping acquired by
drv_mmap(D3),
which sets up a
user mapping to a range of kernel virtual or physical addresses.
Arguments
uvaddrp
User address at which an object is mapped.
len
Size of the mapping in bytes.
Return values
None.
Usage
The uvaddr parameter should contain
the address returned from the
drv_mmap(D3)
function in the *uvaddrp argument.
The len parameter should contain the same value
as was passed to drv_mmap.
While the
drv_munmap( )
function is included in the DDI 8 definition,
the corresponding
drv_mmap(D3)
function is withdrawn from DDI 8
so there is no occasion to use this function
in DDI 8 drivers.