[PATCH] powerpc: Enable demuxed sysv IPC syscalls

[Arnd Bergmann]

On Friday 04 December 2015 00:09:08 Arnd Bergmann wrote:
> On Thursday 03 December 2015 23:12:10 Andreas Schwab wrote:
> > >  #endif
> > > @@ -64,7 +68,12 @@ compat_symbol (libc, __old_msgctl, msgctl, GLIBC_2_0);
> > >  int
> > >  __new_msgctl (int msqid, int cmd, struct msqid_ds *buf)
> > >  {
> > > +#ifdef __ASSUME_MSGCTL_SYSCALL
> > > +  return INLINE_SYSCALL (msgctl, 3, msqid, cmd | __IPC_64, buf);
> > 
> > Why does a brand new syscall need IPC_64?
> 
> This is a bug in the kernel, which we should fix there.  The same
> problem currently exists on ARM and AVR32, which also support the
> old IPC API (pre-__IPC64) and are adding separate syscalls now.

Correction, I looked at the wrong place: ARM and AVR32 have had this
problem for a long time, so we can't fix it any more. But we should
fix it for PowerPC and all other architectures that add these calls
in the future.

	Arnd