powerpc: Set the correct kernel taint on machine check errors.

This means the 'M' flag will work properly when the kernel prints a backtrace.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 6530f1b8874d..37de90f8a845 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -297,6 +297,8 @@ long machine_check_early(struct pt_regs *regs)
 
         __this_cpu_inc(irq_stat.mce_exceptions);
 
+        add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);
+
         if (cur_cpu_spec && cur_cpu_spec->machine_check_early)
                 handled = cur_cpu_spec->machine_check_early(regs);
         return handled;