into home.transmeta.com:/home/torvalds/v2.5/linux

into nuts.ninka.net:/home/davem/src/BK/sparc-2.5

- Jens needs to seperate out the IN/OUT macros to seperate what accesses
are to the IDE_DATA register and the rest.  On big-endian platforms
the IDE_DATA register should be accessed in big-endian for it to all
work out correctly or at least be compatible with the behavior existing
before the IDE platform macro interface changes in 2.5.x

This implements the 'keep the initial thread around until every thread
in the group exits' concept in a different, less intrusive way, along
your suggestions.  There is no exit_done completion handling anymore,
freeing of the task is still done by wait4().  This has the following
side-effect: detached threads/processes can only be started within a
thread group, not in a standalone way.

(This also fixes the bugs introduced by the ->exit_done code, which made
it possible for a zombie task to be reactivated.)

I've introduced the p->group_leader pointer, which can/will be used for
other purposes in the future as well - since from now on the thread
group leader is always existent.  Right now it's used to notify the
parent of the thread group leader from the last non-leader thread that
exits [if the thread group leader is a zombie already].

I distilled the attached fix-patch from Daniel's bigger patch - it
includes all fixes for all currently known ptrace related breakages,
which include things like bad behavior (crash) if the tracer process
dies unexpectedly.

into home.transmeta.com:/home/torvalds/v2.5/linux

into home.transmeta.com:/home/torvalds/v2.5/linux

into samba.org:/scratch/anton/linux-2.5_ppc64drivers

into samba.org:/scratch/anton/linux-2.5_ppc64_new

Exporting kbd_pt_regs in keyboard.c.

into samba.org:/scratch/anton/linux-2.5_ppc64_new

of pcspkr.o and another 90 elsewhere in the .o file.