From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7DE4B367F5A for ; Fri, 3 Apr 2026 06:42:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775198537; cv=none; b=X1vyrJZ4yXH1m30soNQYqh4RlwzWD7Dw2VWEMIExdgMxQ2ta7w0K7/SYS3jl1M/AUvbpqQktzeW4Tc1aa5ceNGV5DwSQZf4mwNfYx+q3O1FyCoZFNuRILyS9RHCkHyxo7cPxiIqAlMEHzqRMXyw1GYyBf1wmkN6+IAvmgCTx4H8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775198537; c=relaxed/simple; bh=v8ouTgq3pPqornUodkpxMO8tuFxQ73c4yGPI1JkcFPA=; h=Date:To:From:Subject:Message-Id; b=UyPI4CAKVihawqqlFl4MWF6OpXmXgJUKuGmQOeCugXaa4K6YihZKrTDk/rEm6zYuEv1LYiX7U1wC6qPfWNGEWb4uA7rBPIL3k3igtl4XdNgIQ5Fg2e1n573hRbdMhgBGnrd4YTy9WOao8Y1iYMy2q6x8f7834uZRkyKaDrj1rAs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=hqv7cYeW; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="hqv7cYeW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F289C4CEF7; Fri, 3 Apr 2026 06:42:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1775198537; bh=v8ouTgq3pPqornUodkpxMO8tuFxQ73c4yGPI1JkcFPA=; h=Date:To:From:Subject:From; b=hqv7cYeWM6Doi5vbyZpUUNMnu2C8mNIGuOcvn/aUdQn5Isw9oQUQqthcznnhux5Py f2OIfHtjbKepZW4thMhJoXfeSVvmqj0i2BsLBuh5pn5x79HbIRg6llQvG/bRYorA3G YuNuJvWgORE59tunWHr3Lajm4pWd4M560HrQBsnk= Date: Thu, 02 Apr 2026 23:42:16 -0700 To: mm-commits@vger.kernel.org,will@kernel.org,tytso@mit.edu,svens@linux.ibm.com,song@kernel.org,richard@nod.at,richard.henderson@linaro.org,palmer@dabbelt.com,npiggin@gmail.com,mpe@ellerman.id.au,mingo@redhat.com,mattst88@gmail.com,maddy@linux.ibm.com,linux@armlinux.org.uk,linmag7@gmail.com,linan122@huawei.com,kernel@xen0n.name,johannes@sipsolutions.net,jason@zx2c4.com,hpa@zytor.com,herbert@gondor.apana.org.au,hca@linux.ibm.com,gor@linux.ibm.com,ebiggers@kernel.org,dsterba@suse.com,davem@davemloft.net,dan.j.williams@intel.com,clm@fb.com,chenhuacai@kernel.org,catalin.marinas@arm.com,bp@alien8.de,borntraeger@linux.ibm.com,arnd@arndb.de,ardb@kernel.org,aou@eecs.berkeley.edu,anton.ivanov@cambridgegreys.com,andreas@gaisler.com,alex@ghiti.fr,agordeev@linux.ibm.com,hch@lst.de,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-nonmm-stable] xor-use-static_call-for-xor_gen.patch removed from -mm tree Message-Id: <20260403064217.4F289C4CEF7@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: xor: use static_call for xor_gen has been removed from the -mm tree. Its filename was xor-use-static_call-for-xor_gen.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 Subject: xor: use static_call for xor_gen Date: Fri, 27 Mar 2026 07:16:59 +0100 Avoid the indirect call for xor_generation by using a static_call. Link: https://lkml.kernel.org/r/20260327061704.3707577-28-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Eric Biggers Tested-by: Eric Biggers Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Andreas Larsson Cc: Anton Ivanov Cc: Ard Biesheuvel Cc: Arnd Bergmann Cc: "Borislav Petkov (AMD)" Cc: Catalin Marinas Cc: Chris Mason Cc: Christian Borntraeger Cc: Dan Williams Cc: David S. Miller Cc: David Sterba Cc: Heiko Carstens Cc: Herbert Xu Cc: "H. Peter Anvin" Cc: Huacai Chen Cc: Ingo Molnar Cc: Jason A. Donenfeld Cc: Johannes Berg Cc: Li Nan Cc: Madhavan Srinivasan Cc: Magnus Lindholm Cc: Matt Turner Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Richard Henderson Cc: Richard Weinberger Cc: Russell King Cc: Song Liu Cc: Sven Schnelle Cc: Ted Ts'o Cc: Vasily Gorbik Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton --- lib/raid/xor/xor-core.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) --- a/lib/raid/xor/xor-core.c~xor-use-static_call-for-xor_gen +++ a/lib/raid/xor/xor-core.c @@ -11,10 +11,10 @@ #include #include #include +#include #include "xor_impl.h" -/* The xor routine to use. */ -static struct xor_block_template *active_template; +DEFINE_STATIC_CALL_NULL(xor_gen_impl, *xor_block_8regs.xor_gen); /** * xor_gen - generate RAID-style XOR information @@ -37,13 +37,13 @@ void xor_gen(void *dest, void **srcs, un WARN_ON_ONCE(bytes == 0); WARN_ON_ONCE(bytes & 511); - active_template->xor_gen(dest, srcs, src_cnt, bytes); + static_call(xor_gen_impl)(dest, srcs, src_cnt, bytes); } EXPORT_SYMBOL(xor_gen); /* Set of all registered templates. */ static struct xor_block_template *__initdata template_list; -static bool __initdata xor_forced = false; +static struct xor_block_template *forced_template; /** * xor_register - register a XOR template @@ -69,7 +69,7 @@ void __init xor_register(struct xor_bloc */ void __init xor_force(struct xor_block_template *tmpl) { - active_template = tmpl; + forced_template = tmpl; } #define BENCH_SIZE 4096 @@ -111,7 +111,7 @@ static int __init calibrate_xor_blocks(v void *b1, *b2; struct xor_block_template *f, *fastest; - if (xor_forced) + if (forced_template) return 0; b1 = (void *) __get_free_pages(GFP_KERNEL, 2); @@ -128,7 +128,7 @@ static int __init calibrate_xor_blocks(v if (f->speed > fastest->speed) fastest = f; } - active_template = fastest; + static_call_update(xor_gen_impl, fastest->xor_gen); pr_info("xor: using function: %s (%d MB/sec)\n", fastest->name, fastest->speed); @@ -156,10 +156,10 @@ static int __init xor_init(void) * If this arch/cpu has a short-circuited selection, don't loop through * all the possible functions, just use the best one. */ - if (active_template) { + if (forced_template) { pr_info("xor: automatically using best checksumming function %-10s\n", - active_template->name); - xor_forced = true; + forced_template->name); + static_call_update(xor_gen_impl, forced_template->xor_gen); return 0; } @@ -170,7 +170,7 @@ static int __init xor_init(void) * Pick the first template as the temporary default until calibration * happens. */ - active_template = template_list; + static_call_update(xor_gen_impl, template_list->xor_gen); return 0; #endif } _ Patches currently in -mm which might be from hch@lst.de are