On Mon, Jul 5, 2021 at 9:13 PM Christoph Hellwig <hch@xxxxxx> wrote:
It still needs "real" kernel-style set_fs for the mm/maccess.c routines,
but adding __{get,put}_kernel_nofault should not be too hard.
Yeah, it's not that it wants set-fs(), it's that I missed that m68k
doesn't have HAVE_GET_KERNEL_NOFAULT.
Implementing __get/put_kernel_nofault() should be fairly
straightforward: they are basically the same thing as the
__get/put_user() functions, except they should just use "move" instead
of "moves".
The m68k uaccess.h file already kind of has support for that, but it's
hardcoded to the CONFIG_CPU_HAS_ADDRESS_SPACES config, rather than
being available as two different versions.
Linus
