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x86/raid6: correctly check for assembler capabilities

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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 <jbeulich@suse.com>
Cc: Jim Kukunas <james.t.kukunas@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Jan Beulich 2015-01-23 08:29:50 +00:00 committed by NeilBrown
parent d959014334
commit 75aaf4c3e6
4 changed files with 9 additions and 2 deletions
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1
arch/x86/Makefile
View File

@ -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)

2
lib/raid6/algos.c
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@ -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,

2
lib/raid6/recov_avx2.c
View File

@ -8,7 +8,7 @@
* of the License.
*/
#if CONFIG_AS_AVX2
#ifdef CONFIG_AS_AVX2
#include <linux/raid/pq.h>
#include "x86.h"

6
lib/raid6/recov_ssse3.c
View File

@ -7,6 +7,8 @@
* of the License.
*/
#ifdef CONFIG_AS_SSSE3
#include <linux/raid/pq.h>
#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