net, lib: kill arch_fast_hash library bits
As there are now no remaining users of arch_fast_hash(), lets kill
it entirely.
This basically reverts commit 71ae8aac3e19 ("lib: introduce arch
optimized hash library") and follow-up work, that is f.e., commit
237217546d44 ("lib: hash: follow-up fixups for arch hash"),
commit e3fec2f74f7f ("lib: Add missing arch generic-y entries for
asm-generic/hash.h") and last but not least commit 6a02652df511
("perf tools: Fix include for non x86 architectures").
Cc: Francesco Fusco <fusco@ntop.org>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/x86/include/asm/hash.h b/arch/x86/include/asm/hash.h
deleted file mode 100644
index e8c58f8..0000000
--- a/arch/x86/include/asm/hash.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef _ASM_X86_HASH_H
-#define _ASM_X86_HASH_H
-
-struct fast_hash_ops;
-extern void setup_arch_fast_hash(struct fast_hash_ops *ops);
-
-#endif /* _ASM_X86_HASH_H */
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index db92793..1530afb 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -23,7 +23,7 @@
lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
lib-$(CONFIG_INSTRUCTION_DECODER) += insn.o inat.o
-obj-y += msr.o msr-reg.o msr-reg-export.o hash.o
+obj-y += msr.o msr-reg.o msr-reg-export.o
ifeq ($(CONFIG_X86_32),y)
obj-y += atomic64_32.o
diff --git a/arch/x86/lib/hash.c b/arch/x86/lib/hash.c
deleted file mode 100644
index ff4fa51..0000000
--- a/arch/x86/lib/hash.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * Some portions derived from code covered by the following notice:
- *
- * Copyright (c) 2010-2013 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <linux/hash.h>
-#include <linux/init.h>
-
-#include <asm/processor.h>
-#include <asm/cpufeature.h>
-#include <asm/hash.h>
-
-static inline u32 crc32_u32(u32 crc, u32 val)
-{
-#ifdef CONFIG_AS_CRC32
- asm ("crc32l %1,%0\n" : "+r" (crc) : "rm" (val));
-#else
- asm (".byte 0xf2, 0x0f, 0x38, 0xf1, 0xc1" : "+a" (crc) : "c" (val));
-#endif
- return crc;
-}
-
-static u32 intel_crc4_2_hash(const void *data, u32 len, u32 seed)
-{
- const u32 *p32 = (const u32 *) data;
- u32 i, tmp = 0;
-
- for (i = 0; i < len / 4; i++)
- seed = crc32_u32(seed, *p32++);
-
- switch (len & 3) {
- case 3:
- tmp |= *((const u8 *) p32 + 2) << 16;
- /* fallthrough */
- case 2:
- tmp |= *((const u8 *) p32 + 1) << 8;
- /* fallthrough */
- case 1:
- tmp |= *((const u8 *) p32);
- seed = crc32_u32(seed, tmp);
- break;
- }
-
- return seed;
-}
-
-static u32 intel_crc4_2_hash2(const u32 *data, u32 len, u32 seed)
-{
- const u32 *p32 = (const u32 *) data;
- u32 i;
-
- for (i = 0; i < len; i++)
- seed = crc32_u32(seed, *p32++);
-
- return seed;
-}
-
-void __init setup_arch_fast_hash(struct fast_hash_ops *ops)
-{
- if (cpu_has_xmm4_2) {
- ops->hash = intel_crc4_2_hash;
- ops->hash2 = intel_crc4_2_hash2;
- }
-}