[radeonhd] strange git commit

hi i think this git commit looks a little bit strange: http://gitweb.freedesktop.org/?p=xorg/driver/xf86-video-radeonhd;a=commitdif... + /* R600 adds an undocumented register at 0x7AD8, + * shifting all subsequent registers by exactly one. */ .....SNIP..... + LVTMA_R600_REG_TEST_OUTPUT = 0x7B18, + + LVTMA_RS690_NOT_DOCUMENTED = 0x7B18, the comment tells that the undocumented register is at 0x7AD8 and the code defines the undocumented register to another offset which allready defined; i think this is a type! mfg hermann