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powerpc/64s/exception: Fix DAR load for handle_page_fault error case

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This buglet goes back to before the 64/32 arch merge, but it does not
seem to have had practical consequences because bad_page_fault does
not use the 2nd argument, but rather regs->dar/nip.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190802105709.27696-18-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2019-08-02 20:56:42 +10:00 committed by Michael Ellerman
parent b3fe35261e
commit c31f7134dc
1 changed files with 1 additions and 1 deletions
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arch/powerpc/kernel/exceptions-64s.S
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@ -2335,7 +2335,7 @@ handle_page_fault:
bl save_nvgprs
mr r5,r3
addi r3,r1,STACK_FRAME_OVERHEAD
lwz r4,_DAR(r1)
ld r4,_DAR(r1)
bl bad_page_fault
b ret_from_except