[RFC] what the hell is going on with /proc/self?

[Al Viro]

	What is the proc_base_stuff[] nonsense about?  AFAICS, that
went in with no reason whatsoever in
commit 801199ce805a2412bbcd9bfe213092ec656013dd
Author: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Date:   Mon Oct 2 02:18:48 2006 -0700

	Rationale is very weak and patch adds considerable complexity
for no good reason.  Besides, it's obfuscated just for the hell of it:
	if (!IS_ERR(result) || PTR_ERR(result) != -ENOENT)
instead of
	if (result != ERR_PTR(-ENOENT))
etc.

	Unless there are _real_ plans that would justify that animal,
I'm going to get rid of it in the pending patch series (/proc/self
cleanups, saner dentry retention for non-process parts, etc.).
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