[PATCH] powerpc/64s: consolidate MCE counter increment.

From: Michal Suchanek
Date: Wed Sep 26 2018 - 08:24:40 EST



The code in machine_check_exception excludes 64s hvmode when
incrementing the MCE counter only to call opal_machine_check to
increment it specifically for this case.

Remove the exclusion and special case.

Fixes: a43c1590426c ("powerpc/pseries: Flush SLB contents on SLB MCE
errors.")

Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>
---
arch/powerpc/kernel/traps.c | 4 +---
arch/powerpc/platforms/powernv/opal.c | 2 --
2 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 6ab66a88db14..e5bc413c7d53 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -741,9 +741,7 @@ void machine_check_exception(struct pt_regs *regs)
if (!nested)
nmi_enter();

- /* 64s accounts the mce in machine_check_early when in HVMODE */
- if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) || !cpu_has_feature(CPU_FTR_HVMODE))
- __this_cpu_inc(irq_stat.mce_exceptions);
+ __this_cpu_inc(irq_stat.mce_exceptions);

add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);

diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 62c291e23dbe..38fe4087484a 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -578,8 +578,6 @@ int opal_machine_check(struct pt_regs *regs)
{
struct machine_check_event evt;

- __this_cpu_inc(irq_stat.mce_exceptions);
-
if (!get_mce_event(&evt, MCE_EVENT_RELEASE))
return 0;

--
2.13.7