From: David Howells <dhowells@redhat.com>
Date: Tue, 28 Apr 2009 14:01:38 +0000 (+0100)
Subject: sched: Document memory barriers implied by sleep/wake-up primitives
X-Git-Tag: v2.6.31-rc1~420^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=50fa610a3b6ba7cf91d7a92229177dfaff2b81a1;p=pandora-kernel.git

sched: Document memory barriers implied by sleep/wake-up primitives

Add a section to the memory barriers document to note the implied
memory barriers of sleep primitives (set_current_state() and wrappers)
and wake-up primitives (wake_up() and co.).

Also extend the in-code comments on the wake_up() functions to note
these implied barriers.

[ Impact: add documentation ]

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <20090428140138.1192.94723.stgit@warthog.procyon.org.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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