[PATCH 5/8] lib/crc: x86: Stop using cpu_has_xfeatures()

[Eric Biggers]

Checking both boot_cpu_has() and cpu_has_xfeatures() has never really
been needed in practice, and it's never been universally done (e.g.,
lib/raid/ omits cpu_has_xfeatures()).  Nevertheless, both x86 and UML
now explicitly clear the AVX and AVX-512 flags if their xfeatures are
missing, which should remove any remaining doubts.

Thus, remove all the calls to cpu_has_xfeatures().

Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
 lib/crc/x86/crc-pclmul-template.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/lib/crc/x86/crc-pclmul-template.h b/lib/crc/x86/crc-pclmul-template.h
index 02744831c6fa..893119bb7c07 100644
--- a/lib/crc/x86/crc-pclmul-template.h
+++ b/lib/crc/x86/crc-pclmul-template.h
@@ -25,20 +25,18 @@ crc_t prefix##_vpclmul_avx512(crc_t crc, const u8 *p, size_t len,	\
 DEFINE_STATIC_CALL(prefix##_pclmul, prefix##_pclmul_sse)
 
 static inline bool have_vpclmul(void)
 {
 	return boot_cpu_has(X86_FEATURE_VPCLMULQDQ) &&
-	       boot_cpu_has(X86_FEATURE_AVX2) &&
-	       cpu_has_xfeatures(XFEATURE_MASK_YMM, NULL);
+	       boot_cpu_has(X86_FEATURE_AVX2);
 }
 
 static inline bool have_avx512(void)
 {
 	return boot_cpu_has(X86_FEATURE_AVX512BW) &&
 	       boot_cpu_has(X86_FEATURE_AVX512VL) &&
-	       !boot_cpu_has(X86_FEATURE_PREFER_YMM) &&
-	       cpu_has_xfeatures(XFEATURE_MASK_AVX512, NULL);
+	       !boot_cpu_has(X86_FEATURE_PREFER_YMM);
 }
 
 /*
  * Call a [V]PCLMULQDQ optimized CRC function if the data length is at least 16
  * bytes, the CPU has PCLMULQDQ support, and the current context may use SIMD.
-- 
2.54.0