On 03/14/2013 03:37:53 AM, Johannes Berg wrote:

On Thu, 2013-03-14 at 11:36 +0800, Wang Dongsheng wrote:
=20

quoted

+#ifdef CONFIG_PPC_BOOK3S_64
 	/* can't use RESTORE_SPECIAL(MSR) */
 	ld	r0, SL_MSR(r11)
 	mtmsrd	r0, 0

=20
Unfortunately, I forgot the reason for this comment, and didn't put a
better one (almost 6 years ago!!)
=20

quoted

+	RESTORE_SPECIAL(MSR)

=20
but maybe you also can't do this on BookE?

If it's because book3s needs mtmsrd instead of mtmsr, that doesn't =20
apply to booke.

-Scott=