On Tue, Oct 16, 2018 at 5:05 AM Guo Ren <[email protected]> wrote: > > The patch adds "user access from kernel" codes. > > Signed-off-by: Guo Ren <[email protected]> > Cc: Arnd Bergmann <[email protected]> > --- > arch/csky/include/asm/uaccess.h | 416 > ++++++++++++++++++++++++++++++++++++++++ > arch/csky/lib/usercopy.c | 262 +++++++++++++++++++++++++ > 2 files changed, 678 insertions(+) > create mode 100644 arch/csky/include/asm/uaccess.h > create mode 100644 arch/csky/lib/usercopy.c
Reviewed-by: Arnd Bergmann <[email protected]> The 64-bit __put_user() is usually what everyone gets wrong, but your version seems fine. Also the access_ok() checks and the copy_to_user() result value all look correct. Arnd
