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powerpc: Fix HMIs on big-endian with CONFIG_RELOCATABLE=y

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[ Upstream commit 505a314fb2 ]

HMIs will crash the kernel due to

	BRANCH_LINK_TO_FAR(hmi_exception_realmode)

Calling into the OPD instead of the actual code.

Fixes: 2337d20728 ("powerpc/64: CONFIG_RELOCATABLE support for hmi interrupts")
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Use DOTSYM() rather than #ifdef]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Benjamin Herrenschmidt
2018-10-08 15:08:31 +11:00
committed by Greg Kroah-Hartman
parent b7ef6f3c6f
commit 9db6e5d263
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kernel/exceptions-64s.S
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@@ -1123,7 +1123,7 @@ TRAMP_REAL_BEGIN(hmi_exception_early)
EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN)
EXCEPTION_PROLOG_COMMON_3(0xe60)
addi r3,r1,STACK_FRAME_OVERHEAD
BRANCH_LINK_TO_FAR(hmi_exception_realmode) /* Function call ABI */
BRANCH_LINK_TO_FAR(DOTSYM(hmi_exception_realmode)) /* Function call ABI */
cmpdi cr0,r3,0
/* Windup the stack. */