Attached is a rewritten proc_pid_read_maps. Patch against 2.4.9-ac9, but
should apply against 2.4.9 as well.

As a side-effect, it's more efficient since it tries to return multiple
lines in each call, without the volatile_task hack.

Code that's older than 2.4.3 can't cause recursions - that was before
the rw-mmap_sem change.

* ptrace doesn't cause any recursions, it always copies into temporary
kernel buffers.

* the multithreaded coredump patch added down_read() around
binfmt->core_dump(). I'll think about the simplest way to fix that.

--
	Manfred