[PATCH 3/7] powerpc/64s: Change irq reconcile for NMIs from reusing _DAR to RESULT

[Nicholas Piggin]

A spare interrupt stack slot is needed to save irq state when
reconciling NMIs (sreset and decrementer soft-nmi). _DAR is used
for this, but we want to reconcile machine checks as well, which
do use _DAR. Switch to using RESULT instead, as it's used by
system calls.

Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
---
 arch/powerpc/kernel/exceptions-64s.S | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 6a936c9199d6..d95c4560c038 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1011,13 +1011,13 @@ EXC_COMMON_BEGIN(system_reset_common)
 	 * the right thing. We do not want to reconcile because that goes
 	 * through irq tracing which we don't want in NMI.
 	 *
-	 * Save PACAIRQHAPPENED to _DAR (otherwise unused), and set HARD_DIS
+	 * Save PACAIRQHAPPENED to RESULT (otherwise unused), and set HARD_DIS
 	 * as we are running with MSR[EE]=0.
 	 */
 	li	r10,IRQS_ALL_DISABLED
 	stb	r10,PACAIRQSOFTMASK(r13)
 	lbz	r10,PACAIRQHAPPENED(r13)
-	std	r10,_DAR(r1)
+	std	r10,RESULT(r1)
 	ori	r10,r10,PACA_IRQ_HARD_DIS
 	stb	r10,PACAIRQHAPPENED(r13)
 
@@ -1038,7 +1038,7 @@ EXC_COMMON_BEGIN(system_reset_common)
 	/*
 	 * Restore soft mask settings.
 	 */
-	ld	r10,_DAR(r1)
+	ld	r10,RESULT(r1)
 	stb	r10,PACAIRQHAPPENED(r13)
 	ld	r10,SOFTE(r1)
 	stb	r10,PACAIRQSOFTMASK(r13)
@@ -2805,7 +2805,7 @@ EXC_COMMON_BEGIN(soft_nmi_common)
 	li	r10,IRQS_ALL_DISABLED
 	stb	r10,PACAIRQSOFTMASK(r13)
 	lbz	r10,PACAIRQHAPPENED(r13)
-	std	r10,_DAR(r1)
+	std	r10,RESULT(r1)
 	ori	r10,r10,PACA_IRQ_HARD_DIS
 	stb	r10,PACAIRQHAPPENED(r13)
 
@@ -2819,7 +2819,7 @@ EXC_COMMON_BEGIN(soft_nmi_common)
 	/*
 	 * Restore soft mask settings.
 	 */
-	ld	r10,_DAR(r1)
+	ld	r10,RESULT(r1)
 	stb	r10,PACAIRQHAPPENED(r13)
 	ld	r10,SOFTE(r1)
 	stb	r10,PACAIRQSOFTMASK(r13)
-- 
2.23.0