From: Hugh Dickins <hugh@veritas.com>
Date: Tue, 31 Oct 2006 18:40:39 +0000 (+0000)
Subject: [POWERPC] Make high hugepage areas preempt safe
X-Git-Tag: v2.6.19-rc5~75^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=96268889ee369b36203b7a06e8aabb197270216e;p=pandora-kernel.git

[POWERPC] Make high hugepage areas preempt safe

Checking source for other get_paca()->field preemption dangers found that
open_high_hpage_areas does a structure copy into its paca while preemption
is enabled: unsafe however gcc accomplishes it.  Just remove that copy:
it's done safely afterwards by on_each_cpu, as in open_low_hpage_areas.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Acked-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

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