Re: [PATCH 3/5] exec: Remove #ifdef 0-out code doing nothing.

[Roland McGrath]

> Mmm, the comment still looks valid to me.  I don't know what else would
> make sure the dynamic linker doesn't put anything where libc expects to
> be putting its heap.  We need to make sure something does that before
> dropping such a scary warning.

It's the "fmh" hack in sysdeps/mach/hurd/dl-sysdep.c that works around an
old bug in vm_map when trying to use the mask.  If you've fixed the
microkernel bug, then you can both rip out the hack, and enable the mask
in the exec server.