From 75aaf4c3e6a4ed48207230cf133a02258ca5abd5 Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Fri, 23 Jan 2015 08:29:50 +0000 Subject: [PATCH] x86/raid6: correctly check for assembler capabilities Just like for AVX2 (which simply needs an #if -> #ifdef conversion), SSSE3 assembler support should be checked for before using it. Signed-off-by: Jan Beulich Cc: Jim Kukunas Acked-by: Thomas Gleixner Signed-off-by: NeilBrown --- arch/x86/Makefile | 1 + lib/raid6/algos.c | 2 +- lib/raid6/recov_avx2.c | 2 +- lib/raid6/recov_ssse3.c | 6 ++++++ 4 files changed, 9 insertions(+), 2 deletions(-) diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 920e6160c535..5ba2d9ce82dc 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -148,6 +148,7 @@ cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTI # does binutils support specific instructions? asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) +asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1) asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1) avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) diff --git a/lib/raid6/algos.c b/lib/raid6/algos.c index 7d0e5cd7b570..dbef2314901e 100644 --- a/lib/raid6/algos.c +++ b/lib/raid6/algos.c @@ -89,10 +89,10 @@ void (*raid6_datap_recov)(int, size_t, int, void **); EXPORT_SYMBOL_GPL(raid6_datap_recov); const struct raid6_recov_calls *const raid6_recov_algos[] = { -#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__) #ifdef CONFIG_AS_AVX2 &raid6_recov_avx2, #endif +#ifdef CONFIG_AS_SSSE3 &raid6_recov_ssse3, #endif &raid6_recov_intx1, diff --git a/lib/raid6/recov_avx2.c b/lib/raid6/recov_avx2.c index e1eea433a493..53fe3d7bdfb3 100644 --- a/lib/raid6/recov_avx2.c +++ b/lib/raid6/recov_avx2.c @@ -8,7 +8,7 @@ * of the License. */ -#if CONFIG_AS_AVX2 +#ifdef CONFIG_AS_AVX2 #include #include "x86.h" diff --git a/lib/raid6/recov_ssse3.c b/lib/raid6/recov_ssse3.c index a9168328f03b..cda33e56a5e3 100644 --- a/lib/raid6/recov_ssse3.c +++ b/lib/raid6/recov_ssse3.c @@ -7,6 +7,8 @@ * of the License. */ +#ifdef CONFIG_AS_SSSE3 + #include #include "x86.h" @@ -330,3 +332,7 @@ const struct raid6_recov_calls raid6_recov_ssse3 = { #endif .priority = 1, }; + +#else +#warning "your version of binutils lacks SSSE3 support" +#endif -- 2.30.2