* [merged mm-nonmm-stable] xor-move-generic-implementations-out-of-asm-generic-xorh.patch removed from -mm tree
@ 2026-04-03 6:41 Andrew Morton
0 siblings, 0 replies; only message in thread
From: Andrew Morton @ 2026-04-03 6:41 UTC (permalink / raw)
To: mm-commits, will, tytso, svens, song, richard, richard.henderson,
palmer, npiggin, mpe, mingo, mattst88, maddy, linux, linmag7,
linan122, kernel, johannes, jason, hpa, herbert, hca, gor,
ebiggers, dsterba, davem, dan.j.williams, clm, chenhuacai,
catalin.marinas, bp, borntraeger, arnd, ardb, aou, anton.ivanov,
andreas, alex, agordeev, hch, akpm
The quilt patch titled
Subject: xor: move generic implementations out of asm-generic/xor.h
has been removed from the -mm tree. Its filename was
xor-move-generic-implementations-out-of-asm-generic-xorh.patch
This patch was dropped because it was merged into the mm-nonmm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Christoph Hellwig <hch@lst.de>
Subject: xor: move generic implementations out of asm-generic/xor.h
Date: Fri, 27 Mar 2026 07:16:42 +0100
Move the generic implementations from asm-generic/xor.h to
per-implementaion .c files in lib/raid. This will build them
unconditionally even when an architecture forces a specific
implementation, but as we'll need at least one generic version for the
static_call optimization later on we'll pay that price.
Note that this would cause the second xor_block_8regs instance created by
arch/arm/lib/xor-neon.c to be generated instead of discarded as dead code,
so add a NO_TEMPLATE symbol to disable it for this case.
Link: https://lkml.kernel.org/r/20260327061704.3707577-11-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Biggers <ebiggers@kernel.org>
Tested-by: Eric Biggers <ebiggers@kernel.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Borislav Petkov (AMD)" <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Mason <clm@fb.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: David Sterba <dsterba@suse.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason A. Donenfeld <jason@zx2c4.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Li Nan <linan122@huawei.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Magnus Lindholm <linmag7@gmail.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Song Liu <song@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Ted Ts'o <tytso@mit.edu>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/arm/lib/xor-neon.c | 4
include/asm-generic/xor.h | 727 ---------------------------
lib/raid/xor/Makefile | 4
lib/raid/xor/xor-32regs-prefetch.c | 268 +++++++++
lib/raid/xor/xor-32regs.c | 219 ++++++++
lib/raid/xor/xor-8regs-prefetch.c | 146 +++++
lib/raid/xor/xor-8regs.c | 105 +++
7 files changed, 748 insertions(+), 725 deletions(-)
--- a/arch/arm/lib/xor-neon.c~xor-move-generic-implementations-out-of-asm-generic-xorh
+++ a/arch/arm/lib/xor-neon.c
@@ -26,8 +26,8 @@ MODULE_LICENSE("GPL");
#pragma GCC optimize "tree-vectorize"
#endif
-#pragma GCC diagnostic ignored "-Wunused-variable"
-#include <asm-generic/xor.h>
+#define NO_TEMPLATE
+#include "../../../lib/raid/xor/xor-8regs.c"
struct xor_block_template const xor_block_neon_inner = {
.name = "__inner_neon__",
--- a/include/asm-generic/xor.h~xor-move-generic-implementations-out-of-asm-generic-xorh
+++ a/include/asm-generic/xor.h
@@ -5,726 +5,7 @@
* Generic optimized RAID-5 checksumming functions.
*/
-#include <linux/prefetch.h>
-
-static void
-xor_8regs_2(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2)
-{
- long lines = bytes / (sizeof (long)) / 8;
-
- do {
- p1[0] ^= p2[0];
- p1[1] ^= p2[1];
- p1[2] ^= p2[2];
- p1[3] ^= p2[3];
- p1[4] ^= p2[4];
- p1[5] ^= p2[5];
- p1[6] ^= p2[6];
- p1[7] ^= p2[7];
- p1 += 8;
- p2 += 8;
- } while (--lines > 0);
-}
-
-static void
-xor_8regs_3(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3)
-{
- long lines = bytes / (sizeof (long)) / 8;
-
- do {
- p1[0] ^= p2[0] ^ p3[0];
- p1[1] ^= p2[1] ^ p3[1];
- p1[2] ^= p2[2] ^ p3[2];
- p1[3] ^= p2[3] ^ p3[3];
- p1[4] ^= p2[4] ^ p3[4];
- p1[5] ^= p2[5] ^ p3[5];
- p1[6] ^= p2[6] ^ p3[6];
- p1[7] ^= p2[7] ^ p3[7];
- p1 += 8;
- p2 += 8;
- p3 += 8;
- } while (--lines > 0);
-}
-
-static void
-xor_8regs_4(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3,
- const unsigned long * __restrict p4)
-{
- long lines = bytes / (sizeof (long)) / 8;
-
- do {
- p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
- p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
- p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
- p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
- p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
- p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
- p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
- p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
- p1 += 8;
- p2 += 8;
- p3 += 8;
- p4 += 8;
- } while (--lines > 0);
-}
-
-static void
-xor_8regs_5(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3,
- const unsigned long * __restrict p4,
- const unsigned long * __restrict p5)
-{
- long lines = bytes / (sizeof (long)) / 8;
-
- do {
- p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
- p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
- p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
- p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
- p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
- p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
- p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
- p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
- p1 += 8;
- p2 += 8;
- p3 += 8;
- p4 += 8;
- p5 += 8;
- } while (--lines > 0);
-}
-
-static void
-xor_32regs_2(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2)
-{
- long lines = bytes / (sizeof (long)) / 8;
-
- do {
- register long d0, d1, d2, d3, d4, d5, d6, d7;
- d0 = p1[0]; /* Pull the stuff into registers */
- d1 = p1[1]; /* ... in bursts, if possible. */
- d2 = p1[2];
- d3 = p1[3];
- d4 = p1[4];
- d5 = p1[5];
- d6 = p1[6];
- d7 = p1[7];
- d0 ^= p2[0];
- d1 ^= p2[1];
- d2 ^= p2[2];
- d3 ^= p2[3];
- d4 ^= p2[4];
- d5 ^= p2[5];
- d6 ^= p2[6];
- d7 ^= p2[7];
- p1[0] = d0; /* Store the result (in bursts) */
- p1[1] = d1;
- p1[2] = d2;
- p1[3] = d3;
- p1[4] = d4;
- p1[5] = d5;
- p1[6] = d6;
- p1[7] = d7;
- p1 += 8;
- p2 += 8;
- } while (--lines > 0);
-}
-
-static void
-xor_32regs_3(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3)
-{
- long lines = bytes / (sizeof (long)) / 8;
-
- do {
- register long d0, d1, d2, d3, d4, d5, d6, d7;
- d0 = p1[0]; /* Pull the stuff into registers */
- d1 = p1[1]; /* ... in bursts, if possible. */
- d2 = p1[2];
- d3 = p1[3];
- d4 = p1[4];
- d5 = p1[5];
- d6 = p1[6];
- d7 = p1[7];
- d0 ^= p2[0];
- d1 ^= p2[1];
- d2 ^= p2[2];
- d3 ^= p2[3];
- d4 ^= p2[4];
- d5 ^= p2[5];
- d6 ^= p2[6];
- d7 ^= p2[7];
- d0 ^= p3[0];
- d1 ^= p3[1];
- d2 ^= p3[2];
- d3 ^= p3[3];
- d4 ^= p3[4];
- d5 ^= p3[5];
- d6 ^= p3[6];
- d7 ^= p3[7];
- p1[0] = d0; /* Store the result (in bursts) */
- p1[1] = d1;
- p1[2] = d2;
- p1[3] = d3;
- p1[4] = d4;
- p1[5] = d5;
- p1[6] = d6;
- p1[7] = d7;
- p1 += 8;
- p2 += 8;
- p3 += 8;
- } while (--lines > 0);
-}
-
-static void
-xor_32regs_4(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3,
- const unsigned long * __restrict p4)
-{
- long lines = bytes / (sizeof (long)) / 8;
-
- do {
- register long d0, d1, d2, d3, d4, d5, d6, d7;
- d0 = p1[0]; /* Pull the stuff into registers */
- d1 = p1[1]; /* ... in bursts, if possible. */
- d2 = p1[2];
- d3 = p1[3];
- d4 = p1[4];
- d5 = p1[5];
- d6 = p1[6];
- d7 = p1[7];
- d0 ^= p2[0];
- d1 ^= p2[1];
- d2 ^= p2[2];
- d3 ^= p2[3];
- d4 ^= p2[4];
- d5 ^= p2[5];
- d6 ^= p2[6];
- d7 ^= p2[7];
- d0 ^= p3[0];
- d1 ^= p3[1];
- d2 ^= p3[2];
- d3 ^= p3[3];
- d4 ^= p3[4];
- d5 ^= p3[5];
- d6 ^= p3[6];
- d7 ^= p3[7];
- d0 ^= p4[0];
- d1 ^= p4[1];
- d2 ^= p4[2];
- d3 ^= p4[3];
- d4 ^= p4[4];
- d5 ^= p4[5];
- d6 ^= p4[6];
- d7 ^= p4[7];
- p1[0] = d0; /* Store the result (in bursts) */
- p1[1] = d1;
- p1[2] = d2;
- p1[3] = d3;
- p1[4] = d4;
- p1[5] = d5;
- p1[6] = d6;
- p1[7] = d7;
- p1 += 8;
- p2 += 8;
- p3 += 8;
- p4 += 8;
- } while (--lines > 0);
-}
-
-static void
-xor_32regs_5(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3,
- const unsigned long * __restrict p4,
- const unsigned long * __restrict p5)
-{
- long lines = bytes / (sizeof (long)) / 8;
-
- do {
- register long d0, d1, d2, d3, d4, d5, d6, d7;
- d0 = p1[0]; /* Pull the stuff into registers */
- d1 = p1[1]; /* ... in bursts, if possible. */
- d2 = p1[2];
- d3 = p1[3];
- d4 = p1[4];
- d5 = p1[5];
- d6 = p1[6];
- d7 = p1[7];
- d0 ^= p2[0];
- d1 ^= p2[1];
- d2 ^= p2[2];
- d3 ^= p2[3];
- d4 ^= p2[4];
- d5 ^= p2[5];
- d6 ^= p2[6];
- d7 ^= p2[7];
- d0 ^= p3[0];
- d1 ^= p3[1];
- d2 ^= p3[2];
- d3 ^= p3[3];
- d4 ^= p3[4];
- d5 ^= p3[5];
- d6 ^= p3[6];
- d7 ^= p3[7];
- d0 ^= p4[0];
- d1 ^= p4[1];
- d2 ^= p4[2];
- d3 ^= p4[3];
- d4 ^= p4[4];
- d5 ^= p4[5];
- d6 ^= p4[6];
- d7 ^= p4[7];
- d0 ^= p5[0];
- d1 ^= p5[1];
- d2 ^= p5[2];
- d3 ^= p5[3];
- d4 ^= p5[4];
- d5 ^= p5[5];
- d6 ^= p5[6];
- d7 ^= p5[7];
- p1[0] = d0; /* Store the result (in bursts) */
- p1[1] = d1;
- p1[2] = d2;
- p1[3] = d3;
- p1[4] = d4;
- p1[5] = d5;
- p1[6] = d6;
- p1[7] = d7;
- p1 += 8;
- p2 += 8;
- p3 += 8;
- p4 += 8;
- p5 += 8;
- } while (--lines > 0);
-}
-
-static void
-xor_8regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2)
-{
- long lines = bytes / (sizeof (long)) / 8 - 1;
- prefetchw(p1);
- prefetch(p2);
-
- do {
- prefetchw(p1+8);
- prefetch(p2+8);
- once_more:
- p1[0] ^= p2[0];
- p1[1] ^= p2[1];
- p1[2] ^= p2[2];
- p1[3] ^= p2[3];
- p1[4] ^= p2[4];
- p1[5] ^= p2[5];
- p1[6] ^= p2[6];
- p1[7] ^= p2[7];
- p1 += 8;
- p2 += 8;
- } while (--lines > 0);
- if (lines == 0)
- goto once_more;
-}
-
-static void
-xor_8regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3)
-{
- long lines = bytes / (sizeof (long)) / 8 - 1;
- prefetchw(p1);
- prefetch(p2);
- prefetch(p3);
-
- do {
- prefetchw(p1+8);
- prefetch(p2+8);
- prefetch(p3+8);
- once_more:
- p1[0] ^= p2[0] ^ p3[0];
- p1[1] ^= p2[1] ^ p3[1];
- p1[2] ^= p2[2] ^ p3[2];
- p1[3] ^= p2[3] ^ p3[3];
- p1[4] ^= p2[4] ^ p3[4];
- p1[5] ^= p2[5] ^ p3[5];
- p1[6] ^= p2[6] ^ p3[6];
- p1[7] ^= p2[7] ^ p3[7];
- p1 += 8;
- p2 += 8;
- p3 += 8;
- } while (--lines > 0);
- if (lines == 0)
- goto once_more;
-}
-
-static void
-xor_8regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3,
- const unsigned long * __restrict p4)
-{
- long lines = bytes / (sizeof (long)) / 8 - 1;
-
- prefetchw(p1);
- prefetch(p2);
- prefetch(p3);
- prefetch(p4);
-
- do {
- prefetchw(p1+8);
- prefetch(p2+8);
- prefetch(p3+8);
- prefetch(p4+8);
- once_more:
- p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
- p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
- p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
- p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
- p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
- p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
- p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
- p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
- p1 += 8;
- p2 += 8;
- p3 += 8;
- p4 += 8;
- } while (--lines > 0);
- if (lines == 0)
- goto once_more;
-}
-
-static void
-xor_8regs_p_5(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3,
- const unsigned long * __restrict p4,
- const unsigned long * __restrict p5)
-{
- long lines = bytes / (sizeof (long)) / 8 - 1;
-
- prefetchw(p1);
- prefetch(p2);
- prefetch(p3);
- prefetch(p4);
- prefetch(p5);
-
- do {
- prefetchw(p1+8);
- prefetch(p2+8);
- prefetch(p3+8);
- prefetch(p4+8);
- prefetch(p5+8);
- once_more:
- p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
- p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
- p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
- p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
- p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
- p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
- p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
- p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
- p1 += 8;
- p2 += 8;
- p3 += 8;
- p4 += 8;
- p5 += 8;
- } while (--lines > 0);
- if (lines == 0)
- goto once_more;
-}
-
-static void
-xor_32regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2)
-{
- long lines = bytes / (sizeof (long)) / 8 - 1;
-
- prefetchw(p1);
- prefetch(p2);
-
- do {
- register long d0, d1, d2, d3, d4, d5, d6, d7;
-
- prefetchw(p1+8);
- prefetch(p2+8);
- once_more:
- d0 = p1[0]; /* Pull the stuff into registers */
- d1 = p1[1]; /* ... in bursts, if possible. */
- d2 = p1[2];
- d3 = p1[3];
- d4 = p1[4];
- d5 = p1[5];
- d6 = p1[6];
- d7 = p1[7];
- d0 ^= p2[0];
- d1 ^= p2[1];
- d2 ^= p2[2];
- d3 ^= p2[3];
- d4 ^= p2[4];
- d5 ^= p2[5];
- d6 ^= p2[6];
- d7 ^= p2[7];
- p1[0] = d0; /* Store the result (in bursts) */
- p1[1] = d1;
- p1[2] = d2;
- p1[3] = d3;
- p1[4] = d4;
- p1[5] = d5;
- p1[6] = d6;
- p1[7] = d7;
- p1 += 8;
- p2 += 8;
- } while (--lines > 0);
- if (lines == 0)
- goto once_more;
-}
-
-static void
-xor_32regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3)
-{
- long lines = bytes / (sizeof (long)) / 8 - 1;
-
- prefetchw(p1);
- prefetch(p2);
- prefetch(p3);
-
- do {
- register long d0, d1, d2, d3, d4, d5, d6, d7;
-
- prefetchw(p1+8);
- prefetch(p2+8);
- prefetch(p3+8);
- once_more:
- d0 = p1[0]; /* Pull the stuff into registers */
- d1 = p1[1]; /* ... in bursts, if possible. */
- d2 = p1[2];
- d3 = p1[3];
- d4 = p1[4];
- d5 = p1[5];
- d6 = p1[6];
- d7 = p1[7];
- d0 ^= p2[0];
- d1 ^= p2[1];
- d2 ^= p2[2];
- d3 ^= p2[3];
- d4 ^= p2[4];
- d5 ^= p2[5];
- d6 ^= p2[6];
- d7 ^= p2[7];
- d0 ^= p3[0];
- d1 ^= p3[1];
- d2 ^= p3[2];
- d3 ^= p3[3];
- d4 ^= p3[4];
- d5 ^= p3[5];
- d6 ^= p3[6];
- d7 ^= p3[7];
- p1[0] = d0; /* Store the result (in bursts) */
- p1[1] = d1;
- p1[2] = d2;
- p1[3] = d3;
- p1[4] = d4;
- p1[5] = d5;
- p1[6] = d6;
- p1[7] = d7;
- p1 += 8;
- p2 += 8;
- p3 += 8;
- } while (--lines > 0);
- if (lines == 0)
- goto once_more;
-}
-
-static void
-xor_32regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3,
- const unsigned long * __restrict p4)
-{
- long lines = bytes / (sizeof (long)) / 8 - 1;
-
- prefetchw(p1);
- prefetch(p2);
- prefetch(p3);
- prefetch(p4);
-
- do {
- register long d0, d1, d2, d3, d4, d5, d6, d7;
-
- prefetchw(p1+8);
- prefetch(p2+8);
- prefetch(p3+8);
- prefetch(p4+8);
- once_more:
- d0 = p1[0]; /* Pull the stuff into registers */
- d1 = p1[1]; /* ... in bursts, if possible. */
- d2 = p1[2];
- d3 = p1[3];
- d4 = p1[4];
- d5 = p1[5];
- d6 = p1[6];
- d7 = p1[7];
- d0 ^= p2[0];
- d1 ^= p2[1];
- d2 ^= p2[2];
- d3 ^= p2[3];
- d4 ^= p2[4];
- d5 ^= p2[5];
- d6 ^= p2[6];
- d7 ^= p2[7];
- d0 ^= p3[0];
- d1 ^= p3[1];
- d2 ^= p3[2];
- d3 ^= p3[3];
- d4 ^= p3[4];
- d5 ^= p3[5];
- d6 ^= p3[6];
- d7 ^= p3[7];
- d0 ^= p4[0];
- d1 ^= p4[1];
- d2 ^= p4[2];
- d3 ^= p4[3];
- d4 ^= p4[4];
- d5 ^= p4[5];
- d6 ^= p4[6];
- d7 ^= p4[7];
- p1[0] = d0; /* Store the result (in bursts) */
- p1[1] = d1;
- p1[2] = d2;
- p1[3] = d3;
- p1[4] = d4;
- p1[5] = d5;
- p1[6] = d6;
- p1[7] = d7;
- p1 += 8;
- p2 += 8;
- p3 += 8;
- p4 += 8;
- } while (--lines > 0);
- if (lines == 0)
- goto once_more;
-}
-
-static void
-xor_32regs_p_5(unsigned long bytes, unsigned long * __restrict p1,
- const unsigned long * __restrict p2,
- const unsigned long * __restrict p3,
- const unsigned long * __restrict p4,
- const unsigned long * __restrict p5)
-{
- long lines = bytes / (sizeof (long)) / 8 - 1;
-
- prefetchw(p1);
- prefetch(p2);
- prefetch(p3);
- prefetch(p4);
- prefetch(p5);
-
- do {
- register long d0, d1, d2, d3, d4, d5, d6, d7;
-
- prefetchw(p1+8);
- prefetch(p2+8);
- prefetch(p3+8);
- prefetch(p4+8);
- prefetch(p5+8);
- once_more:
- d0 = p1[0]; /* Pull the stuff into registers */
- d1 = p1[1]; /* ... in bursts, if possible. */
- d2 = p1[2];
- d3 = p1[3];
- d4 = p1[4];
- d5 = p1[5];
- d6 = p1[6];
- d7 = p1[7];
- d0 ^= p2[0];
- d1 ^= p2[1];
- d2 ^= p2[2];
- d3 ^= p2[3];
- d4 ^= p2[4];
- d5 ^= p2[5];
- d6 ^= p2[6];
- d7 ^= p2[7];
- d0 ^= p3[0];
- d1 ^= p3[1];
- d2 ^= p3[2];
- d3 ^= p3[3];
- d4 ^= p3[4];
- d5 ^= p3[5];
- d6 ^= p3[6];
- d7 ^= p3[7];
- d0 ^= p4[0];
- d1 ^= p4[1];
- d2 ^= p4[2];
- d3 ^= p4[3];
- d4 ^= p4[4];
- d5 ^= p4[5];
- d6 ^= p4[6];
- d7 ^= p4[7];
- d0 ^= p5[0];
- d1 ^= p5[1];
- d2 ^= p5[2];
- d3 ^= p5[3];
- d4 ^= p5[4];
- d5 ^= p5[5];
- d6 ^= p5[6];
- d7 ^= p5[7];
- p1[0] = d0; /* Store the result (in bursts) */
- p1[1] = d1;
- p1[2] = d2;
- p1[3] = d3;
- p1[4] = d4;
- p1[5] = d5;
- p1[6] = d6;
- p1[7] = d7;
- p1 += 8;
- p2 += 8;
- p3 += 8;
- p4 += 8;
- p5 += 8;
- } while (--lines > 0);
- if (lines == 0)
- goto once_more;
-}
-
-static struct xor_block_template xor_block_8regs = {
- .name = "8regs",
- .do_2 = xor_8regs_2,
- .do_3 = xor_8regs_3,
- .do_4 = xor_8regs_4,
- .do_5 = xor_8regs_5,
-};
-
-static struct xor_block_template xor_block_32regs = {
- .name = "32regs",
- .do_2 = xor_32regs_2,
- .do_3 = xor_32regs_3,
- .do_4 = xor_32regs_4,
- .do_5 = xor_32regs_5,
-};
-
-static struct xor_block_template xor_block_8regs_p __maybe_unused = {
- .name = "8regs_prefetch",
- .do_2 = xor_8regs_p_2,
- .do_3 = xor_8regs_p_3,
- .do_4 = xor_8regs_p_4,
- .do_5 = xor_8regs_p_5,
-};
-
-static struct xor_block_template xor_block_32regs_p __maybe_unused = {
- .name = "32regs_prefetch",
- .do_2 = xor_32regs_p_2,
- .do_3 = xor_32regs_p_3,
- .do_4 = xor_32regs_p_4,
- .do_5 = xor_32regs_p_5,
-};
+extern struct xor_block_template xor_block_8regs;
+extern struct xor_block_template xor_block_32regs;
+extern struct xor_block_template xor_block_8regs_p;
+extern struct xor_block_template xor_block_32regs_p;
--- a/lib/raid/xor/Makefile~xor-move-generic-implementations-out-of-asm-generic-xorh
+++ a/lib/raid/xor/Makefile
@@ -3,3 +3,7 @@
obj-$(CONFIG_XOR_BLOCKS) += xor.o
xor-y += xor-core.o
+xor-y += xor-8regs.o
+xor-y += xor-32regs.o
+xor-y += xor-8regs-prefetch.o
+xor-y += xor-32regs-prefetch.o
diff --git a/lib/raid/xor/xor-32regs.c a/lib/raid/xor/xor-32regs.c
new file mode 100644
--- /dev/null
+++ a/lib/raid/xor/xor-32regs.c
@@ -0,0 +1,219 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include <linux/raid/xor_impl.h>
+#include <asm-generic/xor.h>
+
+static void
+xor_32regs_2(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2)
+{
+ long lines = bytes / (sizeof (long)) / 8;
+
+ do {
+ register long d0, d1, d2, d3, d4, d5, d6, d7;
+ d0 = p1[0]; /* Pull the stuff into registers */
+ d1 = p1[1]; /* ... in bursts, if possible. */
+ d2 = p1[2];
+ d3 = p1[3];
+ d4 = p1[4];
+ d5 = p1[5];
+ d6 = p1[6];
+ d7 = p1[7];
+ d0 ^= p2[0];
+ d1 ^= p2[1];
+ d2 ^= p2[2];
+ d3 ^= p2[3];
+ d4 ^= p2[4];
+ d5 ^= p2[5];
+ d6 ^= p2[6];
+ d7 ^= p2[7];
+ p1[0] = d0; /* Store the result (in bursts) */
+ p1[1] = d1;
+ p1[2] = d2;
+ p1[3] = d3;
+ p1[4] = d4;
+ p1[5] = d5;
+ p1[6] = d6;
+ p1[7] = d7;
+ p1 += 8;
+ p2 += 8;
+ } while (--lines > 0);
+}
+
+static void
+xor_32regs_3(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3)
+{
+ long lines = bytes / (sizeof (long)) / 8;
+
+ do {
+ register long d0, d1, d2, d3, d4, d5, d6, d7;
+ d0 = p1[0]; /* Pull the stuff into registers */
+ d1 = p1[1]; /* ... in bursts, if possible. */
+ d2 = p1[2];
+ d3 = p1[3];
+ d4 = p1[4];
+ d5 = p1[5];
+ d6 = p1[6];
+ d7 = p1[7];
+ d0 ^= p2[0];
+ d1 ^= p2[1];
+ d2 ^= p2[2];
+ d3 ^= p2[3];
+ d4 ^= p2[4];
+ d5 ^= p2[5];
+ d6 ^= p2[6];
+ d7 ^= p2[7];
+ d0 ^= p3[0];
+ d1 ^= p3[1];
+ d2 ^= p3[2];
+ d3 ^= p3[3];
+ d4 ^= p3[4];
+ d5 ^= p3[5];
+ d6 ^= p3[6];
+ d7 ^= p3[7];
+ p1[0] = d0; /* Store the result (in bursts) */
+ p1[1] = d1;
+ p1[2] = d2;
+ p1[3] = d3;
+ p1[4] = d4;
+ p1[5] = d5;
+ p1[6] = d6;
+ p1[7] = d7;
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ } while (--lines > 0);
+}
+
+static void
+xor_32regs_4(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4)
+{
+ long lines = bytes / (sizeof (long)) / 8;
+
+ do {
+ register long d0, d1, d2, d3, d4, d5, d6, d7;
+ d0 = p1[0]; /* Pull the stuff into registers */
+ d1 = p1[1]; /* ... in bursts, if possible. */
+ d2 = p1[2];
+ d3 = p1[3];
+ d4 = p1[4];
+ d5 = p1[5];
+ d6 = p1[6];
+ d7 = p1[7];
+ d0 ^= p2[0];
+ d1 ^= p2[1];
+ d2 ^= p2[2];
+ d3 ^= p2[3];
+ d4 ^= p2[4];
+ d5 ^= p2[5];
+ d6 ^= p2[6];
+ d7 ^= p2[7];
+ d0 ^= p3[0];
+ d1 ^= p3[1];
+ d2 ^= p3[2];
+ d3 ^= p3[3];
+ d4 ^= p3[4];
+ d5 ^= p3[5];
+ d6 ^= p3[6];
+ d7 ^= p3[7];
+ d0 ^= p4[0];
+ d1 ^= p4[1];
+ d2 ^= p4[2];
+ d3 ^= p4[3];
+ d4 ^= p4[4];
+ d5 ^= p4[5];
+ d6 ^= p4[6];
+ d7 ^= p4[7];
+ p1[0] = d0; /* Store the result (in bursts) */
+ p1[1] = d1;
+ p1[2] = d2;
+ p1[3] = d3;
+ p1[4] = d4;
+ p1[5] = d5;
+ p1[6] = d6;
+ p1[7] = d7;
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ p4 += 8;
+ } while (--lines > 0);
+}
+
+static void
+xor_32regs_5(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4,
+ const unsigned long * __restrict p5)
+{
+ long lines = bytes / (sizeof (long)) / 8;
+
+ do {
+ register long d0, d1, d2, d3, d4, d5, d6, d7;
+ d0 = p1[0]; /* Pull the stuff into registers */
+ d1 = p1[1]; /* ... in bursts, if possible. */
+ d2 = p1[2];
+ d3 = p1[3];
+ d4 = p1[4];
+ d5 = p1[5];
+ d6 = p1[6];
+ d7 = p1[7];
+ d0 ^= p2[0];
+ d1 ^= p2[1];
+ d2 ^= p2[2];
+ d3 ^= p2[3];
+ d4 ^= p2[4];
+ d5 ^= p2[5];
+ d6 ^= p2[6];
+ d7 ^= p2[7];
+ d0 ^= p3[0];
+ d1 ^= p3[1];
+ d2 ^= p3[2];
+ d3 ^= p3[3];
+ d4 ^= p3[4];
+ d5 ^= p3[5];
+ d6 ^= p3[6];
+ d7 ^= p3[7];
+ d0 ^= p4[0];
+ d1 ^= p4[1];
+ d2 ^= p4[2];
+ d3 ^= p4[3];
+ d4 ^= p4[4];
+ d5 ^= p4[5];
+ d6 ^= p4[6];
+ d7 ^= p4[7];
+ d0 ^= p5[0];
+ d1 ^= p5[1];
+ d2 ^= p5[2];
+ d3 ^= p5[3];
+ d4 ^= p5[4];
+ d5 ^= p5[5];
+ d6 ^= p5[6];
+ d7 ^= p5[7];
+ p1[0] = d0; /* Store the result (in bursts) */
+ p1[1] = d1;
+ p1[2] = d2;
+ p1[3] = d3;
+ p1[4] = d4;
+ p1[5] = d5;
+ p1[6] = d6;
+ p1[7] = d7;
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ p4 += 8;
+ p5 += 8;
+ } while (--lines > 0);
+}
+
+struct xor_block_template xor_block_32regs = {
+ .name = "32regs",
+ .do_2 = xor_32regs_2,
+ .do_3 = xor_32regs_3,
+ .do_4 = xor_32regs_4,
+ .do_5 = xor_32regs_5,
+};
diff --git a/lib/raid/xor/xor-32regs-prefetch.c a/lib/raid/xor/xor-32regs-prefetch.c
new file mode 100644
--- /dev/null
+++ a/lib/raid/xor/xor-32regs-prefetch.c
@@ -0,0 +1,268 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include <linux/prefetch.h>
+#include <linux/raid/xor_impl.h>
+#include <asm-generic/xor.h>
+
+static void
+xor_32regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2)
+{
+ long lines = bytes / (sizeof (long)) / 8 - 1;
+
+ prefetchw(p1);
+ prefetch(p2);
+
+ do {
+ register long d0, d1, d2, d3, d4, d5, d6, d7;
+
+ prefetchw(p1+8);
+ prefetch(p2+8);
+ once_more:
+ d0 = p1[0]; /* Pull the stuff into registers */
+ d1 = p1[1]; /* ... in bursts, if possible. */
+ d2 = p1[2];
+ d3 = p1[3];
+ d4 = p1[4];
+ d5 = p1[5];
+ d6 = p1[6];
+ d7 = p1[7];
+ d0 ^= p2[0];
+ d1 ^= p2[1];
+ d2 ^= p2[2];
+ d3 ^= p2[3];
+ d4 ^= p2[4];
+ d5 ^= p2[5];
+ d6 ^= p2[6];
+ d7 ^= p2[7];
+ p1[0] = d0; /* Store the result (in bursts) */
+ p1[1] = d1;
+ p1[2] = d2;
+ p1[3] = d3;
+ p1[4] = d4;
+ p1[5] = d5;
+ p1[6] = d6;
+ p1[7] = d7;
+ p1 += 8;
+ p2 += 8;
+ } while (--lines > 0);
+ if (lines == 0)
+ goto once_more;
+}
+
+static void
+xor_32regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3)
+{
+ long lines = bytes / (sizeof (long)) / 8 - 1;
+
+ prefetchw(p1);
+ prefetch(p2);
+ prefetch(p3);
+
+ do {
+ register long d0, d1, d2, d3, d4, d5, d6, d7;
+
+ prefetchw(p1+8);
+ prefetch(p2+8);
+ prefetch(p3+8);
+ once_more:
+ d0 = p1[0]; /* Pull the stuff into registers */
+ d1 = p1[1]; /* ... in bursts, if possible. */
+ d2 = p1[2];
+ d3 = p1[3];
+ d4 = p1[4];
+ d5 = p1[5];
+ d6 = p1[6];
+ d7 = p1[7];
+ d0 ^= p2[0];
+ d1 ^= p2[1];
+ d2 ^= p2[2];
+ d3 ^= p2[3];
+ d4 ^= p2[4];
+ d5 ^= p2[5];
+ d6 ^= p2[6];
+ d7 ^= p2[7];
+ d0 ^= p3[0];
+ d1 ^= p3[1];
+ d2 ^= p3[2];
+ d3 ^= p3[3];
+ d4 ^= p3[4];
+ d5 ^= p3[5];
+ d6 ^= p3[6];
+ d7 ^= p3[7];
+ p1[0] = d0; /* Store the result (in bursts) */
+ p1[1] = d1;
+ p1[2] = d2;
+ p1[3] = d3;
+ p1[4] = d4;
+ p1[5] = d5;
+ p1[6] = d6;
+ p1[7] = d7;
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ } while (--lines > 0);
+ if (lines == 0)
+ goto once_more;
+}
+
+static void
+xor_32regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4)
+{
+ long lines = bytes / (sizeof (long)) / 8 - 1;
+
+ prefetchw(p1);
+ prefetch(p2);
+ prefetch(p3);
+ prefetch(p4);
+
+ do {
+ register long d0, d1, d2, d3, d4, d5, d6, d7;
+
+ prefetchw(p1+8);
+ prefetch(p2+8);
+ prefetch(p3+8);
+ prefetch(p4+8);
+ once_more:
+ d0 = p1[0]; /* Pull the stuff into registers */
+ d1 = p1[1]; /* ... in bursts, if possible. */
+ d2 = p1[2];
+ d3 = p1[3];
+ d4 = p1[4];
+ d5 = p1[5];
+ d6 = p1[6];
+ d7 = p1[7];
+ d0 ^= p2[0];
+ d1 ^= p2[1];
+ d2 ^= p2[2];
+ d3 ^= p2[3];
+ d4 ^= p2[4];
+ d5 ^= p2[5];
+ d6 ^= p2[6];
+ d7 ^= p2[7];
+ d0 ^= p3[0];
+ d1 ^= p3[1];
+ d2 ^= p3[2];
+ d3 ^= p3[3];
+ d4 ^= p3[4];
+ d5 ^= p3[5];
+ d6 ^= p3[6];
+ d7 ^= p3[7];
+ d0 ^= p4[0];
+ d1 ^= p4[1];
+ d2 ^= p4[2];
+ d3 ^= p4[3];
+ d4 ^= p4[4];
+ d5 ^= p4[5];
+ d6 ^= p4[6];
+ d7 ^= p4[7];
+ p1[0] = d0; /* Store the result (in bursts) */
+ p1[1] = d1;
+ p1[2] = d2;
+ p1[3] = d3;
+ p1[4] = d4;
+ p1[5] = d5;
+ p1[6] = d6;
+ p1[7] = d7;
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ p4 += 8;
+ } while (--lines > 0);
+ if (lines == 0)
+ goto once_more;
+}
+
+static void
+xor_32regs_p_5(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4,
+ const unsigned long * __restrict p5)
+{
+ long lines = bytes / (sizeof (long)) / 8 - 1;
+
+ prefetchw(p1);
+ prefetch(p2);
+ prefetch(p3);
+ prefetch(p4);
+ prefetch(p5);
+
+ do {
+ register long d0, d1, d2, d3, d4, d5, d6, d7;
+
+ prefetchw(p1+8);
+ prefetch(p2+8);
+ prefetch(p3+8);
+ prefetch(p4+8);
+ prefetch(p5+8);
+ once_more:
+ d0 = p1[0]; /* Pull the stuff into registers */
+ d1 = p1[1]; /* ... in bursts, if possible. */
+ d2 = p1[2];
+ d3 = p1[3];
+ d4 = p1[4];
+ d5 = p1[5];
+ d6 = p1[6];
+ d7 = p1[7];
+ d0 ^= p2[0];
+ d1 ^= p2[1];
+ d2 ^= p2[2];
+ d3 ^= p2[3];
+ d4 ^= p2[4];
+ d5 ^= p2[5];
+ d6 ^= p2[6];
+ d7 ^= p2[7];
+ d0 ^= p3[0];
+ d1 ^= p3[1];
+ d2 ^= p3[2];
+ d3 ^= p3[3];
+ d4 ^= p3[4];
+ d5 ^= p3[5];
+ d6 ^= p3[6];
+ d7 ^= p3[7];
+ d0 ^= p4[0];
+ d1 ^= p4[1];
+ d2 ^= p4[2];
+ d3 ^= p4[3];
+ d4 ^= p4[4];
+ d5 ^= p4[5];
+ d6 ^= p4[6];
+ d7 ^= p4[7];
+ d0 ^= p5[0];
+ d1 ^= p5[1];
+ d2 ^= p5[2];
+ d3 ^= p5[3];
+ d4 ^= p5[4];
+ d5 ^= p5[5];
+ d6 ^= p5[6];
+ d7 ^= p5[7];
+ p1[0] = d0; /* Store the result (in bursts) */
+ p1[1] = d1;
+ p1[2] = d2;
+ p1[3] = d3;
+ p1[4] = d4;
+ p1[5] = d5;
+ p1[6] = d6;
+ p1[7] = d7;
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ p4 += 8;
+ p5 += 8;
+ } while (--lines > 0);
+ if (lines == 0)
+ goto once_more;
+}
+
+struct xor_block_template xor_block_32regs_p = {
+ .name = "32regs_prefetch",
+ .do_2 = xor_32regs_p_2,
+ .do_3 = xor_32regs_p_3,
+ .do_4 = xor_32regs_p_4,
+ .do_5 = xor_32regs_p_5,
+};
diff --git a/lib/raid/xor/xor-8regs.c a/lib/raid/xor/xor-8regs.c
new file mode 100644
--- /dev/null
+++ a/lib/raid/xor/xor-8regs.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include <linux/raid/xor_impl.h>
+#include <asm-generic/xor.h>
+
+static void
+xor_8regs_2(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2)
+{
+ long lines = bytes / (sizeof (long)) / 8;
+
+ do {
+ p1[0] ^= p2[0];
+ p1[1] ^= p2[1];
+ p1[2] ^= p2[2];
+ p1[3] ^= p2[3];
+ p1[4] ^= p2[4];
+ p1[5] ^= p2[5];
+ p1[6] ^= p2[6];
+ p1[7] ^= p2[7];
+ p1 += 8;
+ p2 += 8;
+ } while (--lines > 0);
+}
+
+static void
+xor_8regs_3(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3)
+{
+ long lines = bytes / (sizeof (long)) / 8;
+
+ do {
+ p1[0] ^= p2[0] ^ p3[0];
+ p1[1] ^= p2[1] ^ p3[1];
+ p1[2] ^= p2[2] ^ p3[2];
+ p1[3] ^= p2[3] ^ p3[3];
+ p1[4] ^= p2[4] ^ p3[4];
+ p1[5] ^= p2[5] ^ p3[5];
+ p1[6] ^= p2[6] ^ p3[6];
+ p1[7] ^= p2[7] ^ p3[7];
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ } while (--lines > 0);
+}
+
+static void
+xor_8regs_4(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4)
+{
+ long lines = bytes / (sizeof (long)) / 8;
+
+ do {
+ p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
+ p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
+ p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
+ p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
+ p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
+ p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
+ p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
+ p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ p4 += 8;
+ } while (--lines > 0);
+}
+
+static void
+xor_8regs_5(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4,
+ const unsigned long * __restrict p5)
+{
+ long lines = bytes / (sizeof (long)) / 8;
+
+ do {
+ p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
+ p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
+ p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
+ p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
+ p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
+ p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
+ p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
+ p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ p4 += 8;
+ p5 += 8;
+ } while (--lines > 0);
+}
+
+#ifndef NO_TEMPLATE
+struct xor_block_template xor_block_8regs = {
+ .name = "8regs",
+ .do_2 = xor_8regs_2,
+ .do_3 = xor_8regs_3,
+ .do_4 = xor_8regs_4,
+ .do_5 = xor_8regs_5,
+};
+#endif /* NO_TEMPLATE */
diff --git a/lib/raid/xor/xor-8regs-prefetch.c a/lib/raid/xor/xor-8regs-prefetch.c
new file mode 100644
--- /dev/null
+++ a/lib/raid/xor/xor-8regs-prefetch.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include <linux/prefetch.h>
+#include <linux/raid/xor_impl.h>
+#include <asm-generic/xor.h>
+
+static void
+xor_8regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2)
+{
+ long lines = bytes / (sizeof (long)) / 8 - 1;
+ prefetchw(p1);
+ prefetch(p2);
+
+ do {
+ prefetchw(p1+8);
+ prefetch(p2+8);
+ once_more:
+ p1[0] ^= p2[0];
+ p1[1] ^= p2[1];
+ p1[2] ^= p2[2];
+ p1[3] ^= p2[3];
+ p1[4] ^= p2[4];
+ p1[5] ^= p2[5];
+ p1[6] ^= p2[6];
+ p1[7] ^= p2[7];
+ p1 += 8;
+ p2 += 8;
+ } while (--lines > 0);
+ if (lines == 0)
+ goto once_more;
+}
+
+static void
+xor_8regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3)
+{
+ long lines = bytes / (sizeof (long)) / 8 - 1;
+ prefetchw(p1);
+ prefetch(p2);
+ prefetch(p3);
+
+ do {
+ prefetchw(p1+8);
+ prefetch(p2+8);
+ prefetch(p3+8);
+ once_more:
+ p1[0] ^= p2[0] ^ p3[0];
+ p1[1] ^= p2[1] ^ p3[1];
+ p1[2] ^= p2[2] ^ p3[2];
+ p1[3] ^= p2[3] ^ p3[3];
+ p1[4] ^= p2[4] ^ p3[4];
+ p1[5] ^= p2[5] ^ p3[5];
+ p1[6] ^= p2[6] ^ p3[6];
+ p1[7] ^= p2[7] ^ p3[7];
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ } while (--lines > 0);
+ if (lines == 0)
+ goto once_more;
+}
+
+static void
+xor_8regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4)
+{
+ long lines = bytes / (sizeof (long)) / 8 - 1;
+
+ prefetchw(p1);
+ prefetch(p2);
+ prefetch(p3);
+ prefetch(p4);
+
+ do {
+ prefetchw(p1+8);
+ prefetch(p2+8);
+ prefetch(p3+8);
+ prefetch(p4+8);
+ once_more:
+ p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
+ p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
+ p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
+ p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
+ p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
+ p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
+ p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
+ p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ p4 += 8;
+ } while (--lines > 0);
+ if (lines == 0)
+ goto once_more;
+}
+
+static void
+xor_8regs_p_5(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4,
+ const unsigned long * __restrict p5)
+{
+ long lines = bytes / (sizeof (long)) / 8 - 1;
+
+ prefetchw(p1);
+ prefetch(p2);
+ prefetch(p3);
+ prefetch(p4);
+ prefetch(p5);
+
+ do {
+ prefetchw(p1+8);
+ prefetch(p2+8);
+ prefetch(p3+8);
+ prefetch(p4+8);
+ prefetch(p5+8);
+ once_more:
+ p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
+ p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
+ p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
+ p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
+ p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
+ p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
+ p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
+ p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
+ p1 += 8;
+ p2 += 8;
+ p3 += 8;
+ p4 += 8;
+ p5 += 8;
+ } while (--lines > 0);
+ if (lines == 0)
+ goto once_more;
+}
+
+struct xor_block_template xor_block_8regs_p = {
+ .name = "8regs_prefetch",
+ .do_2 = xor_8regs_p_2,
+ .do_3 = xor_8regs_p_3,
+ .do_4 = xor_8regs_p_4,
+ .do_5 = xor_8regs_p_5,
+};
_
Patches currently in -mm which might be from hch@lst.de are
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2026-04-03 6:41 [merged mm-nonmm-stable] xor-move-generic-implementations-out-of-asm-generic-xorh.patch removed from -mm tree Andrew Morton
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