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authorJan Beulich <JBeulich@suse.com>2014-02-27 08:47:02 +0000
committerH. Peter Anvin <hpa@linux.intel.com>2014-03-19 16:51:04 -0700
commit06325190bd577e11429444d54f454b9d13f560c9 (patch)
tree2bf84044b54c0651d589656ac9cf2c3d11618c51 /arch/x86/Makefile
parentdcb99fd9b08cfe1afe426af4d8d3cbc429190f15 (diff)
downloadop-kernel-dev-06325190bd577e11429444d54f454b9d13f560c9.zip
op-kernel-dev-06325190bd577e11429444d54f454b9d13f560c9.tar.gz
x86, hash: Fix build failure with older binutils
Just like for other ISA extension instruction uses we should check whether the assembler actually supports them. The fallback here simply is to encode an instruction with fixed operands (%eax and %ecx). [ hpa: tagging for -stable as a build fix ] Signed-off-by: Jan Beulich <jbeulich@suse.com> Link: http://lkml.kernel.org/r/530F0996020000780011FBE7@nat28.tlf.novell.com Cc: Francesco Fusco <ffusco@redhat.com> Cc: Thomas Graf <tgraf@redhat.com> Cc: David S. Miller <davem@davemloft.net> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: <stable@vger.kernel.org> # v3.14
Diffstat (limited to 'arch/x86/Makefile')
-rw-r--r--arch/x86/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index eeda43a..f8842c4 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -152,6 +152,7 @@ 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 += $(call as-instr,crc32l %eax$(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)
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