On Friday 09 December 2011 13:48:52 Andrew Morton wrote:

What would we need to do to get all architectures using the new
interfaces, and remove __ARCH_WANT_OLD_COMPAT_IPC?

We would change the various compat_sys_ipc functions (mips, powerpc,
s390, sparc, x86) to call the new functions instead of the existing
ones, and test each architecture. For parisc, we might not
actually need the either version, but I'd have to take a closer look
to be sure.

Regarding the implementation: rather than patching the header
files, it would be more conventional (and arguably better) to add

        select ARCH_WANT_OLD_COMPAT_IPC

to arch/*/Kconfig, then use CONFIG_ARCH_WANT_OLD_COMPAT_IPC.

Yes.

	Arnd