On Wed, May 24, 2017 at 3:18 AM, Arnd Bergmann <arnd@xxxxxxxx> wrote: > On Wed, May 24, 2017 at 11:59 AM, Geert Uytterhoeven > <geert@xxxxxxxxxxxxxx> wrote: >> I guess the time is ripe for adding (both) symbols to all architectures? > > Good idea. I think we can do most of this by adding a few lines to > arch/Kconfig: > > config CPU_BIG_ENDIAN > bool > > config CPU_LITTLE_ENDIAN > def_bool !CPU_BIG_ENDIAN > > This way, we only need to add 'select CPU_BIG_ENDIAN' to the > architectures that are always big-endian, and we don't need to > change anything for the ones that have a single 'CPU_BIG_ENDIAN' > option. > > The three architectures that have a 'choice' statement (mips, ppc and > sh) will have to convert, and m32r will have to replace the > option with the opposite one, which could break 'make oldconfig', > but nobody really cares about m32r any more. Xtensa may have either endianness and for xtensa we define CONFIG_CPU_BIG_ENDIAN or CONFIG_CPU_LITTLE_ENDIAN in the arch/xtensa/Makefile based on the value of the compiler builtin macro. -- Thanks. -- Max
