Re: [PATCH] ARM: add get_user() support for 8 byte types

On Thursday 15 November 2012, Rob Clark wrote:

From: Rob Clark rob@ti.com

A new atomic modeset/pageflip ioctl being developed in DRM requires get_user() to work for 64bit types (in addition to just put_user()).

v1: original v2: pass correct size to check_uaccess, and better handling of narrowing double word read with __get_user_xb() (Russell King's suggestion) v3: explain in comment about why this works for narrowing fetch to 1, 2, or 4 byte type on ARM.

Signed-off-by: Rob Clark rob@ti.com

Acked-by: Arnd Bergmann arnd@arndb.de