1 files changed, 0 insertions, 124 deletions
diff --git a/arch/x86/lib/crc32-glue.c b/arch/x86/lib/crc32-glue.c
deleted file mode 100644
index 2dd18a886ded..000000000000
--- a/arch/x86/lib/crc32-glue.c
+++ /dev/null
@@ -1,124 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * x86-optimized CRC32 functions
- *
- * Copyright (C) 2008 Intel Corporation
- * Copyright 2012 Xyratex Technology Limited
- * Copyright 2024 Google LLC
- */
-
-#include <asm/cpufeatures.h>
-#include <asm/simd.h>
-#include <crypto/internal/simd.h>
-#include <linux/crc32.h>
-#include <linux/linkage.h>
-#include <linux/module.h>
-
-/* minimum size of buffer for crc32_pclmul_le_16 */
-#define CRC32_PCLMUL_MIN_LEN	64
-
-static DEFINE_STATIC_KEY_FALSE(have_crc32);
-static DEFINE_STATIC_KEY_FALSE(have_pclmulqdq);
-
-u32 crc32_pclmul_le_16(u32 crc, const u8 *buffer, size_t len);
-
-u32 crc32_le_arch(u32 crc, const u8 *p, size_t len)
-{
-	if (len >= CRC32_PCLMUL_MIN_LEN + 15 &&
-	    static_branch_likely(&have_pclmulqdq) && crypto_simd_usable()) {
-		size_t n = -(uintptr_t)p & 15;
-
-		/* align p to 16-byte boundary */
-		if (n) {
-			crc = crc32_le_base(crc, p, n);
-			p += n;
-			len -= n;
-		}
-		n = round_down(len, 16);
-		kernel_fpu_begin();
-		crc = crc32_pclmul_le_16(crc, p, n);
-		kernel_fpu_end();
-		p += n;
-		len -= n;
-	}
-	if (len)
-		crc = crc32_le_base(crc, p, len);
-	return crc;
-}
-EXPORT_SYMBOL(crc32_le_arch);
-
-#ifdef CONFIG_X86_64
-#define CRC32_INST "crc32q %1, %q0"
-#else
-#define CRC32_INST "crc32l %1, %0"
-#endif
-
-/*
- * Use carryless multiply version of crc32c when buffer size is >= 512 to
- * account for FPU state save/restore overhead.
- */
-#define CRC32C_PCLMUL_BREAKEVEN	512
-
-asmlinkage u32 crc32c_x86_3way(u32 crc, const u8 *buffer, size_t len);
-
-u32 crc32c_le_arch(u32 crc, const u8 *p, size_t len)
-{
-	size_t num_longs;
-
-	if (!static_branch_likely(&have_crc32))
-		return crc32c_le_base(crc, p, len);
-
-	if (IS_ENABLED(CONFIG_X86_64) && len >= CRC32C_PCLMUL_BREAKEVEN &&
-	    static_branch_likely(&have_pclmulqdq) && crypto_simd_usable()) {
-		kernel_fpu_begin();
-		crc = crc32c_x86_3way(crc, p, len);
-		kernel_fpu_end();
-		return crc;
-	}
-
-	for (num_longs = len / sizeof(unsigned long);
-	     num_longs != 0; num_longs--, p += sizeof(unsigned long))
-		asm(CRC32_INST : "+r" (crc) : "rm" (*(unsigned long *)p));
-
-	for (len %= sizeof(unsigned long); len; len--, p++)
-		asm("crc32b %1, %0" : "+r" (crc) : "rm" (*p));
-
-	return crc;
-}
-EXPORT_SYMBOL(crc32c_le_arch);
-
-u32 crc32_be_arch(u32 crc, const u8 *p, size_t len)
-{
-	return crc32_be_base(crc, p, len);
-}
-EXPORT_SYMBOL(crc32_be_arch);
-
-static int __init crc32_x86_init(void)
-{
-	if (boot_cpu_has(X86_FEATURE_XMM4_2))
-		static_branch_enable(&have_crc32);
-	if (boot_cpu_has(X86_FEATURE_PCLMULQDQ))
-		static_branch_enable(&have_pclmulqdq);
-	return 0;
-}
-arch_initcall(crc32_x86_init);
-
-static void __exit crc32_x86_exit(void)
-{
-}
-module_exit(crc32_x86_exit);
-
-u32 crc32_optimizations(void)
-{
-	u32 optimizations = 0;
-
-	if (static_key_enabled(&have_crc32))
-		optimizations |= CRC32C_OPTIMIZATION;
-	if (static_key_enabled(&have_pclmulqdq))
-		optimizations |= CRC32_LE_OPTIMIZATION;
-	return optimizations;
-}
-EXPORT_SYMBOL(crc32_optimizations);
-
-MODULE_DESCRIPTION("x86-optimized CRC32 functions");
-MODULE_LICENSE("GPL");