From 157484abb9b05e3f49cd3903202ffad35cea4350 Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Fri, 15 Jun 2018 10:22:18 +0200 Subject: [PATCH] s390: disable asm code expolines if cc does not support it To avoid a mixture of asm code with expolines and c code without them, propagate CC_USING_EXPOLINE to KBUILD_AFLAGS and use it to detect whether asm code should have expolines or not. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky --- arch/s390/Makefile | 1 + arch/s390/include/asm/nospec-insn.h | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/s390/Makefile b/arch/s390/Makefile index 68a690442be0..8a41110d3a9a 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -82,6 +82,7 @@ ifdef CONFIG_EXPOLINE CC_FLAGS_EXPOLINE += -mindirect-branch-table export CC_FLAGS_EXPOLINE cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE + aflags-y += -DCC_USING_EXPOLINE endif endif diff --git a/arch/s390/include/asm/nospec-insn.h b/arch/s390/include/asm/nospec-insn.h index a01f81186e86..123dac3717b3 100644 --- a/arch/s390/include/asm/nospec-insn.h +++ b/arch/s390/include/asm/nospec-insn.h @@ -8,7 +8,7 @@ #ifdef __ASSEMBLY__ -#ifdef CONFIG_EXPOLINE +#ifdef CC_USING_EXPOLINE _LC_BR_R1 = __LC_BR_R1 @@ -189,7 +189,7 @@ _LC_BR_R1 = __LC_BR_R1 .macro BASR_EX rsave,rtarget,ruse=%r1 basr \rsave,\rtarget .endm -#endif +#endif /* CC_USING_EXPOLINE */ #endif /* __ASSEMBLY__ */ -- 2.30.2