Mahesh J Salgaonkar <mah...@linux.vnet.ibm.com> writes: > From: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com> > > The current implementation of MCE early handling modifies CR0/1 registers > without saving its old values. Fix this by moving early check for > powersaving mode to machine_check_handle_early(). > > The power architecture 2.06 or later allows the possibility of getting > machine check while in nap/sleep/winkle. The last bit of HSPRG0 is set > to 1, if thread is woken up from winkle. Hence, clear the last bit of > HSPRG0 (r13) before MCE handler starts using it as paca pointer. > > Also, the current code always puts the thread into nap state irrespective > of whatever idle state it woke up from. Fix that by looking at > paca->thread_idle_state and put the thread back into same state where it > came from. > > Cc: sta...@vger.kernel.org
The information I need is "which commit introduced the bug". Given that I can work out which stable releases we should backport the patch to. cheers
