On Wed, 2015-16-12 at 10:53:29 UTC, Michael Ellerman wrote:
> This partially reverts commit a34236155afb1cc41945e58388ac988431bcb0b8.
> 
> While reviewing the glibc patch to exploit the individual IPC calls,
> Arnd & Andreas noticed that we were still requiring userspace to pass
> IPC_64 in order to get the new style IPC API.
> 
> With a bit of cleanup in the kernel we can drop that requirement, and
> instead only provide the new style API, which will simplify things for
> userspace.
> 
> Rather than try and sneak that patch into 4.4, instead we will drop the
> individual IPC calls for powerpc, and merge them again in 4.5 once the
> cleanup patch has gone in.
> 
> Because we've already added sys_mlock2() as syscall #378, we don't do a
> full revert of the IPC calls. Instead we drop the __NR #defines, and
> send those now undefined syscall numbers to sys_ni_syscall(). This
> leaves a gap in the syscall numbers, but we'll reuse them when we merge
> the individual IPC calls.
> 
> Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
> Acked-by: Arnd Bergmann <a...@arndb.de>

Applied to powerpc fixes.

https://git.kernel.org/powerpc/c/2475c362134a0fa5309c7b0f

cheers
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