s390/zcrypt: remove set_fs() invocation in zcrypt device driver

This patch reworks the zcrypt device driver so that the set_fs()
invocation is not needed any more. Instead there is a new flag bool
userspace passed through all the functions which tells if the pointer
arguments are userspace or kernelspace. Together with the two new
inline functions z_copy_from_user() and z_copy_to_user() which either
invoke copy_from_user (userspace is true) or memcpy (userspace is
false) the zcrypt dd and the AP bus now has no requirement for
the set_fs() functionality any more.

Signed-off-by: Harald Freudenberger <[email protected]>
Reviewed-by: Ingo Franzki <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>

0 files changed, 0 insertions, 0 deletions