On Tue, Aug 27, 2013 at 01:01:32AM +0530, Mahesh J Salgaonkar wrote: > From: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com> > > This patch introduces exclusive emergency stack for machine check exception. > We use emergency stack to handle machine check exception so that we can save > MCE information (srr1, srr0, dar and dsisr) before turning on ME bit and be > ready for re-entrancy. This helps us to prevent clobbering of MCE information > in case of nested machine checks. > > The reason for using emergency stack over normal kernel stack is that the > machine check might occur in the middle of setting up a stack frame which may > result into improper use of kernel stack. > > Signed-off-by: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <pau...@samba.org> _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
