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

Signed-off-by: Daniel Axtens <d...@axtens.net>
---
 arch/powerpc/kernel/traps.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 6530f1b..37de90f 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;
-- 
2.1.4

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