linux-kernel - [PATCH 4/4] powerpc/32: Avoid #ifdef nested with FTR

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Date:   Fri,  4 Jun 2021 14:54:15 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 4/4] powerpc/32: Avoid #ifdef nested with FTR_SECTION on booke
 syscall entry

On booke, SYSCALL_ENTRY macro nests an FTR_SECTION with a

Duplicate the single instruction alternative to avoid nesting.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/kernel/head_booke.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 10f31146b472..87b806e8eded 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -128,10 +128,10 @@ BEGIN_FTR_SECTION
 	mr	r12, r13
 	lwz	r13, THREAD_NORMSAVE(2)(r10)
 FTR_SECTION_ELSE
-#endif
 	mfcr	r12
-#ifdef CONFIG_KVM_BOOKE_HV
 ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
+#else
+	mfcr	r12
 #endif
 	mfspr	r9, SPRN_SRR1
 	BOOKE_CLEAR_BTB(r11)
-- 
2.25.0