Merge branch 'kill_arch_fast_hash'

Daniel Borkmann says:

====================
Kill arch_fast_hash

Due to the size of changes I have based this against net-next,
also given 3.18 is already out. I've split this into 3 parts,
the first two to remove existing users (so they can optionally
go to stable) and the last one to kill the remaining library bits.

Let me know if there are any issues.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

40 files changed, 12 insertions, 228 deletions

diff --git a/arch/alpha/include/asm/Kbuild b/arch/alpha/include/asm/Kbuild
index 25b49725df07..76aeb8fa551a 100644
--- a/arch/alpha/include/asm/Kbuild
+++ b/arch/alpha/include/asm/Kbuild
@@ -3,7 +3,6 @@
 generic-y += clkdev.h
 generic-y += cputime.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
diff --git a/arch/arc/include/asm/Kbuild b/arch/arc/include/asm/Kbuild
index b8fffc1a2ac2..be0c39e76f7c 100644
--- a/arch/arc/include/asm/Kbuild
+++ b/arch/arc/include/asm/Kbuild
@@ -12,7 +12,6 @@ generic-y += fb.h
 generic-y += fcntl.h
 generic-y += ftrace.h
 generic-y += hardirq.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += ioctl.h
 generic-y += ioctls.h
diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild
index 70cd84eb7fda..fe74c0d1e485 100644
--- a/arch/arm/include/asm/Kbuild
+++ b/arch/arm/include/asm/Kbuild
@@ -7,7 +7,6 @@ generic-y += current.h
 generic-y += emergency-restart.h
 generic-y += errno.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += ioctl.h
 generic-y += ipcbuf.h
 generic-y += irq_regs.h
diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild
index dc770bd4f5a5..6b61091c7f4c 100644
--- a/arch/arm64/include/asm/Kbuild
+++ b/arch/arm64/include/asm/Kbuild
@@ -14,7 +14,6 @@ generic-y += early_ioremap.h
 generic-y += emergency-restart.h
 generic-y += errno.h
 generic-y += ftrace.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += ioctl.h
 generic-y += ioctls.h
diff --git a/arch/avr32/include/asm/Kbuild b/arch/avr32/include/asm/Kbuild
index 2a71b1cb9848..528d70d47a54 100644
--- a/arch/avr32/include/asm/Kbuild
+++ b/arch/avr32/include/asm/Kbuild
@@ -7,7 +7,6 @@ generic-y += div64.h
 generic-y += emergency-restart.h
 generic-y += exec.h
 generic-y += futex.h
-generic-y += hash.h
 generic-y += irq_regs.h
 generic-y += irq_work.h
 generic-y += local.h
diff --git a/arch/blackfin/include/asm/Kbuild b/arch/blackfin/include/asm/Kbuild
index 46ed6bb9c679..4bd3c3cfc9ab 100644
--- a/arch/blackfin/include/asm/Kbuild
+++ b/arch/blackfin/include/asm/Kbuild
@@ -10,7 +10,6 @@ generic-y += emergency-restart.h
 generic-y += errno.h
 generic-y += fb.h
 generic-y += futex.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += ioctl.h
 generic-y += ipcbuf.h
diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild
index e77e0c1dbe75..2de73391b81e 100644
--- a/arch/c6x/include/asm/Kbuild
+++ b/arch/c6x/include/asm/Kbuild
@@ -15,7 +15,6 @@ generic-y += exec.h
 generic-y += fb.h
 generic-y += fcntl.h
 generic-y += futex.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += io.h
 generic-y += ioctl.h
diff --git a/arch/cris/include/asm/Kbuild b/arch/cris/include/asm/Kbuild
index 2ca489eaadd3..d5f124832fd1 100644
--- a/arch/cris/include/asm/Kbuild
+++ b/arch/cris/include/asm/Kbuild
@@ -7,7 +7,6 @@ generic-y += barrier.h
 generic-y += clkdev.h
 generic-y += cputime.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += kvm_para.h
 generic-y += linkage.h
diff --git a/arch/frv/include/asm/Kbuild b/arch/frv/include/asm/Kbuild
index 3caf05cabfc5..e3f81b53578e 100644
--- a/arch/frv/include/asm/Kbuild
+++ b/arch/frv/include/asm/Kbuild
@@ -2,7 +2,6 @@
 generic-y += clkdev.h
 generic-y += cputime.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
diff --git a/arch/hexagon/include/asm/Kbuild b/arch/hexagon/include/asm/Kbuild
index 5f234a5a2320..c7a99f860b40 100644
--- a/arch/hexagon/include/asm/Kbuild
+++ b/arch/hexagon/include/asm/Kbuild
@@ -16,7 +16,6 @@ generic-y += fb.h
 generic-y += fcntl.h
 generic-y += ftrace.h
 generic-y += hardirq.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += ioctl.h
 generic-y += ioctls.h
diff --git a/arch/ia64/include/asm/Kbuild b/arch/ia64/include/asm/Kbuild
index 747320be9d0e..9b41b4bcc073 100644
--- a/arch/ia64/include/asm/Kbuild
+++ b/arch/ia64/include/asm/Kbuild
@@ -1,7 +1,6 @@
 
 generic-y += clkdev.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
diff --git a/arch/m32r/include/asm/Kbuild b/arch/m32r/include/asm/Kbuild
index 3796801d6e0c..2edc793372fc 100644
--- a/arch/m32r/include/asm/Kbuild
+++ b/arch/m32r/include/asm/Kbuild
@@ -2,7 +2,6 @@
 generic-y += clkdev.h
 generic-y += cputime.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += mcs_spinlock.h
 generic-y += module.h
diff --git a/arch/m68k/include/asm/Kbuild b/arch/m68k/include/asm/Kbuild
index dbaf9f3065e8..9b6c691874bd 100644
--- a/arch/m68k/include/asm/Kbuild
+++ b/arch/m68k/include/asm/Kbuild
@@ -6,7 +6,6 @@ generic-y += device.h
 generic-y += emergency-restart.h
 generic-y += errno.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += ioctl.h
 generic-y += ipcbuf.h
diff --git a/arch/metag/include/asm/Kbuild b/arch/metag/include/asm/Kbuild
index 7b8111c8f937..0bf5d525b945 100644
--- a/arch/metag/include/asm/Kbuild
+++ b/arch/metag/include/asm/Kbuild
@@ -13,7 +13,6 @@ generic-y += fb.h
 generic-y += fcntl.h
 generic-y += futex.h
 generic-y += hardirq.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += ioctl.h
 generic-y += ioctls.h
diff --git a/arch/microblaze/include/asm/Kbuild b/arch/microblaze/include/asm/Kbuild
index 448143b8cabd..ab564a6db5c3 100644
--- a/arch/microblaze/include/asm/Kbuild
+++ b/arch/microblaze/include/asm/Kbuild
@@ -4,7 +4,6 @@ generic-y += clkdev.h
 generic-y += cputime.h
 generic-y += device.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
diff --git a/arch/mips/include/asm/Kbuild b/arch/mips/include/asm/Kbuild
index 72e1cf1cab00..200efeac4181 100644
--- a/arch/mips/include/asm/Kbuild
+++ b/arch/mips/include/asm/Kbuild
@@ -3,7 +3,6 @@ generic-y += cputime.h
 generic-y += current.h
 generic-y += dma-contiguous.h
 generic-y += emergency-restart.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += local64.h
 generic-y += mcs_spinlock.h
diff --git a/arch/mn10300/include/asm/Kbuild b/arch/mn10300/include/asm/Kbuild
index 54a062cb9f2c..f892d9de47d9 100644
--- a/arch/mn10300/include/asm/Kbuild
+++ b/arch/mn10300/include/asm/Kbuild
@@ -3,7 +3,6 @@ generic-y += barrier.h
 generic-y += clkdev.h
 generic-y += cputime.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
diff --git a/arch/openrisc/include/asm/Kbuild b/arch/openrisc/include/asm/Kbuild
index 89b61d7dc790..91f1f360a7c4 100644
--- a/arch/openrisc/include/asm/Kbuild
+++ b/arch/openrisc/include/asm/Kbuild
@@ -25,7 +25,6 @@ generic-y += fcntl.h
 generic-y += ftrace.h
 generic-y += futex.h
 generic-y += hardirq.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += ioctl.h
 generic-y += ioctls.h
diff --git a/arch/parisc/include/asm/Kbuild b/arch/parisc/include/asm/Kbuild
index ffb024b8423f..8686237a3c3c 100644
--- a/arch/parisc/include/asm/Kbuild
+++ b/arch/parisc/include/asm/Kbuild
@@ -7,7 +7,6 @@ generic-y += device.h
 generic-y += div64.h
 generic-y += emergency-restart.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += irq_regs.h
 generic-y += irq_work.h
diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild
index 31e8f59aff38..382b28e364dc 100644
--- a/arch/powerpc/include/asm/Kbuild
+++ b/arch/powerpc/include/asm/Kbuild
@@ -1,6 +1,5 @@
 
 generic-y += clkdev.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
diff --git a/arch/s390/include/asm/Kbuild b/arch/s390/include/asm/Kbuild
index 773f86676588..c631f98fd524 100644
--- a/arch/s390/include/asm/Kbuild
+++ b/arch/s390/include/asm/Kbuild
@@ -1,7 +1,6 @@
 
 
 generic-y += clkdev.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
diff --git a/arch/score/include/asm/Kbuild b/arch/score/include/asm/Kbuild
index 46461c19f284..83ed116d414c 100644
--- a/arch/score/include/asm/Kbuild
+++ b/arch/score/include/asm/Kbuild
@@ -5,7 +5,6 @@ header-y +=
 generic-y += barrier.h
 generic-y += clkdev.h
 generic-y += cputime.h
-generic-y += hash.h
 generic-y += irq_work.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
diff --git a/arch/sh/include/asm/Kbuild b/arch/sh/include/asm/Kbuild
index 5a6c9acff0d2..654ebb6bd5d8 100644
--- a/arch/sh/include/asm/Kbuild
+++ b/arch/sh/include/asm/Kbuild
@@ -8,7 +8,6 @@ generic-y += emergency-restart.h
 generic-y += errno.h
 generic-y += exec.h
 generic-y += fcntl.h
-generic-y += hash.h
 generic-y += ioctl.h
 generic-y += ipcbuf.h
 generic-y += irq_regs.h
diff --git a/arch/sparc/include/asm/Kbuild b/arch/sparc/include/asm/Kbuild
index f5f94ce1692c..94f36e7086a7 100644
--- a/arch/sparc/include/asm/Kbuild
+++ b/arch/sparc/include/asm/Kbuild
@@ -6,7 +6,6 @@ generic-y += cputime.h
 generic-y += div64.h
 generic-y += emergency-restart.h
 generic-y += exec.h
-generic-y += hash.h
 generic-y += irq_regs.h
 generic-y += irq_work.h
 generic-y += linkage.h
diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild
index e6462b8a6284..b4c488b65745 100644
--- a/arch/tile/include/asm/Kbuild
+++ b/arch/tile/include/asm/Kbuild
@@ -11,7 +11,6 @@ generic-y += errno.h
 generic-y += exec.h
 generic-y += fb.h
 generic-y += fcntl.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += ioctl.h
 generic-y += ioctls.h
diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild
index 244b12c8cb39..9176fa11d49b 100644
--- a/arch/um/include/asm/Kbuild
+++ b/arch/um/include/asm/Kbuild
@@ -10,7 +10,6 @@ generic-y += exec.h
 generic-y += ftrace.h
 generic-y += futex.h
 generic-y += hardirq.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += io.h
 generic-y += irq_regs.h
diff --git a/arch/unicore32/include/asm/Kbuild b/arch/unicore32/include/asm/Kbuild
index 5a2bb53faa42..3e0c19d0f4c5 100644
--- a/arch/unicore32/include/asm/Kbuild
+++ b/arch/unicore32/include/asm/Kbuild
@@ -16,7 +16,6 @@ generic-y += fcntl.h
 generic-y += ftrace.h
 generic-y += futex.h
 generic-y += hardirq.h
-generic-y += hash.h
 generic-y += hw_irq.h
 generic-y += ioctl.h
 generic-y += ioctls.h
diff --git a/arch/x86/include/asm/hash.h b/arch/x86/include/asm/hash.h
deleted file mode 100644
index e8c58f88b1d4..000000000000
--- 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 db92793b7e23..1530afb07c85 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -23,7 +23,7 @@ lib-y += memcpy_$(BITS).o
 lib-$(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 ff4fa51a5b1f..000000000000
--- 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;
-	}
-}
diff --git a/arch/xtensa/include/asm/Kbuild b/arch/xtensa/include/asm/Kbuild
index 105d38922c44..86a9ab2e2ca9 100644
--- a/arch/xtensa/include/asm/Kbuild
+++ b/arch/xtensa/include/asm/Kbuild
@@ -9,7 +9,6 @@ generic-y += errno.h
 generic-y += exec.h
 generic-y += fcntl.h
 generic-y += hardirq.h
-generic-y += hash.h
 generic-y += ioctl.h
 generic-y += irq_regs.h
 generic-y += irq_work.h
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index e9c3afe4b5d3..4e1d7268b004 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -41,7 +41,7 @@
 #include <linux/ratelimit.h>
 #include <linux/sunrpc/svcauth_gss.h>
 #include <linux/sunrpc/addr.h>
-#include <linux/hash.h>
+#include <linux/jhash.h>
 #include "xdr4.h"
 #include "xdr4cb.h"
 #include "vfs.h"
@@ -594,7 +594,7 @@ static int delegation_blocked(struct knfsd_fh *fh)
 		}
 		spin_unlock(&blocked_delegations_lock);
 	}
-	hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0);
+	hash = jhash(&fh->fh_base, fh->fh_size, 0);
 	if (test_bit(hash&255, bd->set[0]) &&
 	    test_bit((hash>>8)&255, bd->set[0]) &&
 	    test_bit((hash>>16)&255, bd->set[0]))
@@ -613,7 +613,7 @@ static void block_delegations(struct knfsd_fh *fh)
 	u32 hash;
 	struct bloom_pair *bd = &blocked_delegations;
 
-	hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0);
+	hash = jhash(&fh->fh_base, fh->fh_size, 0);
 
 	spin_lock(&blocked_delegations_lock);
 	__set_bit(hash&255, bd->set[bd->new]);
diff --git a/include/asm-generic/hash.h b/include/asm-generic/hash.h
deleted file mode 100644
index b6312843dbd9..000000000000
--- a/include/asm-generic/hash.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef __ASM_GENERIC_HASH_H
-#define __ASM_GENERIC_HASH_H
-
-struct fast_hash_ops;
-static inline void setup_arch_fast_hash(struct fast_hash_ops *ops)
-{
-}
-
-#endif /* __ASM_GENERIC_HASH_H */
diff --git a/include/linux/hash.h b/include/linux/hash.h
index d0494c399392..1afde47e1528 100644
--- a/include/linux/hash.h
+++ b/include/linux/hash.h
@@ -15,7 +15,6 @@
  */
 
 #include <asm/types.h>
-#include <asm/hash.h>
 #include <linux/compiler.h>
 
 /* 2^31 + 2^29 - 2^25 + 2^22 - 2^19 - 2^16 + 1 */
@@ -84,38 +83,4 @@ static inline u32 hash32_ptr(const void *ptr)
 	return (u32)val;
 }
 
-struct fast_hash_ops {
-	u32 (*hash)(const void *data, u32 len, u32 seed);
-	u32 (*hash2)(const u32 *data, u32 len, u32 seed);
-};
-
-/**
- *	arch_fast_hash - Caclulates a hash over a given buffer that can have
- *			 arbitrary size. This function will eventually use an
- *			 architecture-optimized hashing implementation if
- *			 available, and trades off distribution for speed.
- *
- *	@data: buffer to hash
- *	@len: length of buffer in bytes
- *	@seed: start seed
- *
- *	Returns 32bit hash.
- */
-extern u32 arch_fast_hash(const void *data, u32 len, u32 seed);
-
-/**
- *	arch_fast_hash2 - Caclulates a hash over a given buffer that has a
- *			  size that is of a multiple of 32bit words. This
- *			  function will eventually use an architecture-
- *			  optimized hashing implementation if available,
- *			  and trades off distribution for speed.
- *
- *	@data: buffer to hash (must be 32bit padded)
- *	@len: number of 32bit words
- *	@seed: start seed
- *
- *	Returns 32bit hash.
- */
-extern u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed);
-
 #endif /* _LINUX_HASH_H */
diff --git a/lib/Makefile b/lib/Makefile
index 0211d2bd5e17..4b9baa45a4d9 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -26,7 +26,7 @@ obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
 	 bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
 	 gcd.o lcm.o list_sort.o uuid.o flex_array.o iovec.o clz_ctz.o \
 	 bsearch.o find_last_bit.o find_next_bit.o llist.o memweight.o kfifo.o \
-	 percpu-refcount.o percpu_ida.o hash.o rhashtable.o reciprocal_div.o
+	 percpu-refcount.o percpu_ida.o rhashtable.o reciprocal_div.o
 obj-y += string_helpers.o
 obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o
 obj-y += kstrtox.o
diff --git a/lib/hash.c b/lib/hash.c
deleted file mode 100644
index fea973f4bd57..000000000000
--- a/lib/hash.c
+++ /dev/null
@@ -1,39 +0,0 @@
-/* General purpose hashing library
- *
- * That's a start of a kernel hashing library, which can be extended
- * with further algorithms in future. arch_fast_hash{2,}() will
- * eventually resolve to an architecture optimized implementation.
- *
- * Copyright 2013 Francesco Fusco <ffusco@redhat.com>
- * Copyright 2013 Daniel Borkmann <dborkman@redhat.com>
- * Copyright 2013 Thomas Graf <tgraf@redhat.com>
- * Licensed under the GNU General Public License, version 2.0 (GPLv2)
- */
-
-#include <linux/jhash.h>
-#include <linux/hash.h>
-#include <linux/cache.h>
-
-static struct fast_hash_ops arch_hash_ops __read_mostly = {
-	.hash  = jhash,
-	.hash2 = jhash2,
-};
-
-u32 arch_fast_hash(const void *data, u32 len, u32 seed)
-{
-	return arch_hash_ops.hash(data, len, seed);
-}
-EXPORT_SYMBOL_GPL(arch_fast_hash);
-
-u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed)
-{
-	return arch_hash_ops.hash2(data, len, seed);
-}
-EXPORT_SYMBOL_GPL(arch_fast_hash2);
-
-static int __init hashlib_init(void)
-{
-	setup_arch_fast_hash(&arch_hash_ops);
-	return 0;
-}
-early_initcall(hashlib_init);
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index c7e987ab3361..6c3c723e902b 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -20,7 +20,7 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/mm.h>
-#include <linux/hash.h>
+#include <linux/jhash.h>
 #include <linux/random.h>
 #include <linux/rhashtable.h>
 
@@ -524,7 +524,7 @@ static size_t rounded_hashtable_size(struct rhashtable_params *params)
  *	.head_offset = offsetof(struct test_obj, node),
  *	.key_offset = offsetof(struct test_obj, key),
  *	.key_len = sizeof(int),
- *	.hashfn = arch_fast_hash,
+ *	.hashfn = jhash,
  * #ifdef CONFIG_PROVE_LOCKING
  *	.mutex_is_held = &my_mutex_is_held,
  * #endif
@@ -545,7 +545,7 @@ static size_t rounded_hashtable_size(struct rhashtable_params *params)
  *
  * struct rhashtable_params params = {
  *	.head_offset = offsetof(struct test_obj, node),
- *	.hashfn = arch_fast_hash,
+ *	.hashfn = jhash,
  *	.obj_hashfn = my_hash_fn,
  * #ifdef CONFIG_PROVE_LOCKING
  *	.mutex_is_held = &my_mutex_is_held,
@@ -778,7 +778,7 @@ static int __init test_rht_init(void)
 		.head_offset = offsetof(struct test_obj, node),
 		.key_offset = offsetof(struct test_obj, value),
 		.key_len = sizeof(int),
-		.hashfn = arch_fast_hash,
+		.hashfn = jhash,
 #ifdef CONFIG_PROVE_LOCKING
 		.mutex_is_held = &test_mutex_is_held,
 #endif
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index cc9bcf008b03..ef5f77b44ec7 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -3129,7 +3129,7 @@ static int __init netlink_proto_init(void)
 		.head_offset = offsetof(struct netlink_sock, node),
 		.key_offset = offsetof(struct netlink_sock, portid),
 		.key_len = sizeof(u32), /* portid */
-		.hashfn = arch_fast_hash,
+		.hashfn = jhash,
 		.max_shift = 16, /* 64K */
 		.grow_decision = rht_grow_above_75,
 		.shrink_decision = rht_shrink_below_30,
diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
index e0a7fefc1edf..5899bf161c61 100644
--- a/net/openvswitch/flow_table.c
+++ b/net/openvswitch/flow_table.c
@@ -25,7 +25,7 @@
 #include <linux/if_vlan.h>
 #include <net/llc_pdu.h>
 #include <linux/kernel.h>
-#include <linux/hash.h>
+#include <linux/jhash.h>
 #include <linux/jiffies.h>
 #include <linux/llc.h>
 #include <linux/module.h>
@@ -366,7 +366,7 @@ static u32 flow_hash(const struct sw_flow_key *key, int key_start,
 	/* Make sure number of hash bytes are multiple of u32. */
 	BUILD_BUG_ON(sizeof(long) % sizeof(u32));
 
-	return arch_fast_hash2(hash_key, hash_u32s, 0);
+	return jhash2(hash_key, hash_u32s, 0);
 }
 
 static int flow_key_start(const struct sw_flow_key *key)
diff --git a/tools/perf/util/include/asm/hash.h b/tools/perf/util/include/asm/hash.h
deleted file mode 100644
index d82b170bb216..000000000000
--- a/tools/perf/util/include/asm/hash.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __ASM_GENERIC_HASH_H
-#define __ASM_GENERIC_HASH_H
-
-/* Stub */
-
-#endif /* __ASM_GENERIC_HASH_H */