From 35ebc4de105989034f1250e40eb6dbf5e136b04e Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 27 Mar 2026 07:16:41 +0100
Subject: xor: remove macro abuse for XOR implementation registrations

Drop the pretty confusing historic XOR_TRY_TEMPLATES and
XOR_SELECT_TEMPLATE, and instead let the architectures provide a
arch_xor_init that calls either xor_register to register candidates or
xor_force to force a specific implementation.

Link: https://lkml.kernel.org/r/20260327061704.3707577-10-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/alpha/include/asm/xor.h | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

(limited to 'arch/alpha/include')

diff --git a/arch/alpha/include/asm/xor.h b/arch/alpha/include/asm/xor.h
index e0de0c233ab9..4c8085711df1 100644
--- a/arch/alpha/include/asm/xor.h
+++ b/arch/alpha/include/asm/xor.h
@@ -851,16 +851,19 @@ static struct xor_block_template xor_block_alpha_prefetch = {
 /* For grins, also test the generic routines.  */
 #include <asm-generic/xor.h>
 
-#undef XOR_TRY_TEMPLATES
-#define XOR_TRY_TEMPLATES				\
-	do {						\
-		xor_speed(&xor_block_8regs);		\
-		xor_speed(&xor_block_32regs);		\
-		xor_speed(&xor_block_alpha);		\
-		xor_speed(&xor_block_alpha_prefetch);	\
-	} while (0)
-
-/* Force the use of alpha_prefetch if EV6, as it is significantly
-   faster in the cold cache case.  */
-#define XOR_SELECT_TEMPLATE(FASTEST) \
-	(implver() == IMPLVER_EV6 ? &xor_block_alpha_prefetch : FASTEST)
+/*
+ * Force the use of alpha_prefetch if EV6, as it is significantly faster in the
+ * cold cache case.
+ */
+#define arch_xor_init arch_xor_init
+static __always_inline void __init arch_xor_init(void)
+{
+	if (implver() == IMPLVER_EV6) {
+		xor_force(&xor_block_alpha_prefetch);
+	} else {
+		xor_register(&xor_block_8regs);
+		xor_register(&xor_block_32regs);
+		xor_register(&xor_block_alpha);
+		xor_register(&xor_block_alpha_prefetch);
+	}
+}
-- 
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