e7c8a7e350
Move to use the DEVICE_ATTR_RW/RO macros, making it easier to audit the sysfs file permissions, and get rid of the "empty" callback for read-only files, saving lines of code. Cc: Stefan Hajnoczi <stefanha@gmail.com> Cc: Laurent Navet <laurent.navet@gmail.com> Cc: Johannes Thumshirn <morbidrsa@googlemail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>