Hi, With 2.6.10 i get a compilation error with disable_6xx_mmu i guess this is linked with the patch you supplied in december in arch/ppc/boot/common/util.S Patch which comment disable_6xx_mmu if flags CONFIG_6XX not defined. The problem arise in arch/ppc/boot/simple/misc-prep.c where there is no conditional compilation for this function. Attached is a patch that use the flags CONFIG_6XX to comment out call to this function if flags not set. By the way there is many compilation warning related to PPC with 2.6.10 anyone looking to correct them ? Signed-off-by: Jerome Glisse best, Jerome Glisse