Re: [PATCH V9 14/21] csky: User access
From: Arnd Bergmann <arnd@arndb.de>
Date: 2018-10-17 15:37:57
Also in:
linux-arch, lkml
On Tue, Oct 16, 2018 at 5:05 AM Guo Ren [off-list ref] wrote:
The patch adds "user access from kernel" codes. Signed-off-by: Guo Ren <redacted> Cc: Arnd Bergmann <arnd@arndb.de> --- 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 <arnd@arndb.de>
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