From: H. Peter Anvin <hpa@linux.intel.com>
Date: Wed, 21 Jul 2010 21:23:10 +0000 (-0700)
Subject: x86, xsave: Make xstate_enable_boot_cpu() __init, protect on CPU 0
X-Git-Tag: v2.6.36-rc1~507^2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1cff92d8fdb27684308864d9cdb324bee43b40ab;p=pandora-kernel.git

x86, xsave: Make xstate_enable_boot_cpu() __init, protect on CPU 0

xstate_enable_boot_cpu() is, as the name implies, only used on the
boot CPU; furthermore, it invokes alloc_bootmem(), which is __init;
hence it needs to be tagged __init rather than __cpuinit.

Furthermore, it is *not* safe in the long run to rely on CPU 0 only
coming online during the early boot -- at some point we're going to
support offlining (and re-onlining) the boot CPU, and at that point we
must not call xstate_enable_boot_cpu() again.

The code is a fair bit more obscure than one would like, because the
__ref overrides aren't quite powerful enough.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Robert Richter <robert.richter@amd.com>
LKML-Reference: <4C476236.1020302@zytor.com>
---

Reading git-diff-tree failed