[tip: x86/fpu] lib/crc: x86: Stop using cpu_has_xfeatures()
From: tip-bot2 for Eric Biggers
Date: Wed Sep 09 2026 - 19:59:19 EST
The following commit has been merged into the x86/fpu branch of tip:
Commit-ID: b93f05df9c660a3a11d1db608a859241d65ccb96
Gitweb: https://git.kernel.org/tip/b93f05df9c660a3a11d1db608a859241d65ccb96
Author: Eric Biggers <ebiggers@xxxxxxxxxx>
AuthorDate: Tue, 01 Sep 2026 07:57:37 -07:00
Committer: Borislav Petkov (AMD) <bp@xxxxxxxxx>
CommitterDate: Wed, 09 Sep 2026 14:04:40 -07:00
lib/crc: x86: Stop using cpu_has_xfeatures()
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>
Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Acked-by: Christoph Hellwig <hch@xxxxxx>
Link: https://patch.msgid.link/20260901145740.42337-6-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 0274483..893119b 100644
--- a/lib/crc/x86/crc-pclmul-template.h
+++ b/lib/crc/x86/crc-pclmul-template.h
@@ -27,16 +27,14 @@ 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);
}
/*