From c081a0c7cfe42adf8e8b9c2b8d0b2ec7f47603e8 Mon Sep 17 00:00:00 2001
From: Greg Banks <gnb@melbourne.sgi.com>
Date: Mon, 2 Oct 2006 02:17:57 -0700
Subject: [PATCH] [PATCH] knfsd: test and set SK_BUSY atomically

The SK_BUSY bit in svc_sock->sk_flags ensures that we do not attempt to
enqueue a socket twice.  Currently, setting and clearing the bit is protected
by svc_serv->sv_lock.  As I intend to reduce the data that the lock protects
so it's not held when svc_sock_enqueue() tests and sets SK_BUSY, that test and
set needs to be atomic.

Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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