raid6: skip avx512 checks

It is no longer necessary to check for CONFIG_AS_AVX512, since the minimum
assembler version is now from binutils-2.30 and this always supports it.

Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

Author: arndb

lib/raid6/algos.c

@@ -28,10 +28,8 @@ EXPORT_SYMBOL_GPL(raid6_call);
 
 const struct raid6_calls * const raid6_algos[] = {
 #if defined(__i386__) && !defined(__arch_um__)
-#ifdef CONFIG_AS_AVX512
 	&raid6_avx512x2,
 	&raid6_avx512x1,
-#endif
 	&raid6_avx2x2,
 	&raid6_avx2x1,
 	&raid6_sse2x2,
@@ -42,11 +40,9 @@ const struct raid6_calls * const raid6_algos[] = {
 	&raid6_mmxx1,
 #endif
 #if defined(__x86_64__) && !defined(__arch_um__)
-#ifdef CONFIG_AS_AVX512
 	&raid6_avx512x4,
 	&raid6_avx512x2,
 	&raid6_avx512x1,
-#endif
 	&raid6_avx2x4,
 	&raid6_avx2x2,
 	&raid6_avx2x1,
@@ -96,9 +92,7 @@ EXPORT_SYMBOL_GPL(raid6_datap_recov);
 
 const struct raid6_recov_calls *const raid6_recov_algos[] = {
 #ifdef CONFIG_X86
-#ifdef CONFIG_AS_AVX512
 	&raid6_recov_avx512,
-#endif
 	&raid6_recov_avx2,
 	&raid6_recov_ssse3,
 #endif

lib/raid6/avx512.c

@@ -17,8 +17,6 @@
  *
  */
 
-#ifdef CONFIG_AS_AVX512
-
 #include <linux/raid/pq.h>
 #include "x86.h"
 
@@ -560,5 +558,3 @@ const struct raid6_calls raid6_avx512x4 = {
 	.priority = 2		/* Prefer AVX512 over priority 1 (SSE2 and others) */
 };
 #endif
-
-#endif /* CONFIG_AS_AVX512 */

lib/raid6/recov_avx512.c

@@ -6,8 +6,6 @@
  * Author: Megha Dey <[email protected]>
  */
 
-#ifdef CONFIG_AS_AVX512
-
 #include <linux/raid/pq.h>
 #include "x86.h"
 
@@ -377,7 +375,3 @@ const struct raid6_recov_calls raid6_recov_avx512 = {
 #endif
 	.priority = 3,
 };
-
-#else
-#warning "your version of binutils lacks AVX512 support"
-#endif

lib/raid6/test/Makefile

@@ -54,9 +54,6 @@ endif
 ifeq ($(IS_X86),yes)
         OBJS   += mmx.o sse1.o sse2.o avx2.o recov_ssse3.o recov_avx2.o avx512.o recov_avx512.o
         CFLAGS += -DCONFIG_X86
-        CFLAGS += $(shell echo "vpmovm2b %k1, %zmm5" |          \
-                    gcc -c -x assembler - >/dev/null 2>&1 &&    \
-                    rm ./-.o && echo -DCONFIG_AS_AVX512=1)
 else ifeq ($(HAS_NEON),yes)
         OBJS   += neon.o neon1.o neon2.o neon4.o neon8.o recov_neon.o recov_neon_inner.o
         CFLAGS += -DCONFIG_KERNEL_MODE_NEON=1