powerpc/64s/exceptions: Change irq reconcile for NMIs from reusing _DAR to RESULT

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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@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200508043408.886394-4-npiggin@gmail.com

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Nicholas Piggin 2020-05-08 14:33:55 +10:00 • committed by Michael Ellerman

parent ac2a2a1417

commit 16754d25bd

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arch/powerpc/kernel/exceptions-64s.S

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