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[73.224.175.84]) by smtp.gmail.com with ESMTPSA id 00721157ae682-6f75bf90de2sm17571157b3.70.2025.01.28.08.46.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Jan 2025 08:46:58 -0800 (PST) From: Yury Norov To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, netdev@vger.kernel.org, virtualization@lists.linux.dev, linux-nvme@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-scsi@vger.kernel.org, linux-crypto@vger.kernel.org, Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Madhavan Srinivasan , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Haren Myneni , Rick Lindsley , Nick Child , Thomas Falcon , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?utf-8?q?Eugenio_P=C3=A9rez?= , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , James Smart , Dick Kennedy , "James E.J. Bottomley" , "Martin K. Petersen" , Yury Norov , Rasmus Villemoes , Matt Wu , Steffen Klassert , Daniel Jordan , Andrew Morton , Greg Kurz , Peter Xu , Shrikanth Hegde , Hendrik Brueckner Subject: [PATCH v2 05/13] cpumask: deprecate cpumask_next_wrap() Date: Tue, 28 Jan 2025 11:46:34 -0500 Message-ID: <20250128164646.4009-6-yury.norov@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250128164646.4009-1-yury.norov@gmail.com> References: <20250128164646.4009-1-yury.norov@gmail.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The next patch aligns implementation of cpumask_next_wrap() with the find_next_bit_wrap(), and it changes function signature. To make the transition smooth, this patch deprecates current implementation by adding an _old suffix. The following patches switch current users to the new implementation one by one. No functional changes were intended. Signed-off-by: Yury Norov --- arch/s390/kernel/processor.c | 2 +- drivers/pci/controller/pci-hyperv.c | 2 +- drivers/scsi/lpfc/lpfc_init.c | 2 +- include/linux/cpumask.h | 4 ++-- kernel/padata.c | 2 +- lib/cpumask.c | 6 +++--- 6 files changed, 9 insertions(+), 9 deletions(-) diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c index 5ce9a795a0fe..42ca61909030 100644 --- a/arch/s390/kernel/processor.c +++ b/arch/s390/kernel/processor.c @@ -72,7 +72,7 @@ void notrace stop_machine_yield(const struct cpumask *cpumask) this_cpu = smp_processor_id(); if (__this_cpu_inc_return(cpu_relax_retry) >= spin_retry) { __this_cpu_write(cpu_relax_retry, 0); - cpu = cpumask_next_wrap(this_cpu, cpumask, this_cpu, false); + cpu = cpumask_next_wrap_old(this_cpu, cpumask, this_cpu, false); if (cpu >= nr_cpu_ids) return; if (arch_vcpu_is_preempted(cpu)) diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c index 6084b38bdda1..c39316966de5 100644 --- a/drivers/pci/controller/pci-hyperv.c +++ b/drivers/pci/controller/pci-hyperv.c @@ -1757,7 +1757,7 @@ static int hv_compose_multi_msi_req_get_cpu(void) spin_lock_irqsave(&multi_msi_cpu_lock, flags); - cpu_next = cpumask_next_wrap(cpu_next, cpu_online_mask, nr_cpu_ids, + cpu_next = cpumask_next_wrap_old(cpu_next, cpu_online_mask, nr_cpu_ids, false); cpu = cpu_next; diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 7f57397d91a9..31622fb0614a 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -12876,7 +12876,7 @@ lpfc_irq_rebalance(struct lpfc_hba *phba, unsigned int cpu, bool offline) if (offline) { /* Find next online CPU on original mask */ - cpu_next = cpumask_next_wrap(cpu, orig_mask, cpu, true); + cpu_next = cpumask_next_wrap_old(cpu, orig_mask, cpu, true); cpu_select = lpfc_next_online_cpu(orig_mask, cpu_next); /* Found a valid CPU */ diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 30042351f15f..b267a4f6a917 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -296,7 +296,7 @@ unsigned int cpumask_next_and(int n, const struct cpumask *src1p, #if NR_CPUS == 1 static __always_inline -unsigned int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap) +unsigned int cpumask_next_wrap_old(int n, const struct cpumask *mask, int start, bool wrap) { cpumask_check(start); if (n != -1) @@ -312,7 +312,7 @@ unsigned int cpumask_next_wrap(int n, const struct cpumask *mask, int start, boo return cpumask_first(mask); } #else -unsigned int __pure cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap); +unsigned int __pure cpumask_next_wrap_old(int n, const struct cpumask *mask, int start, bool wrap); #endif /** diff --git a/kernel/padata.c b/kernel/padata.c index 418987056340..78e202fabf90 100644 --- a/kernel/padata.c +++ b/kernel/padata.c @@ -290,7 +290,7 @@ static struct padata_priv *padata_find_next(struct parallel_data *pd, if (remove_object) { list_del_init(&padata->list); ++pd->processed; - pd->cpu = cpumask_next_wrap(cpu, pd->cpumask.pcpu, -1, false); + pd->cpu = cpumask_next_wrap_old(cpu, pd->cpumask.pcpu, -1, false); } spin_unlock(&reorder->lock); diff --git a/lib/cpumask.c b/lib/cpumask.c index e77ee9d46f71..c9a9b451772a 100644 --- a/lib/cpumask.c +++ b/lib/cpumask.c @@ -8,7 +8,7 @@ #include /** - * cpumask_next_wrap - helper to implement for_each_cpu_wrap + * cpumask_next_wrap_old - helper to implement for_each_cpu_wrap * @n: the cpu prior to the place to search * @mask: the cpumask pointer * @start: the start point of the iteration @@ -19,7 +19,7 @@ * Note: the @wrap argument is required for the start condition when * we cannot assume @start is set in @mask. */ -unsigned int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap) +unsigned int cpumask_next_wrap_old(int n, const struct cpumask *mask, int start, bool wrap) { unsigned int next; 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[73.224.175.84]) by smtp.gmail.com with ESMTPSA id 3f1490d57ef6-e589a2260a9sm196205276.37.2025.01.28.08.46.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Jan 2025 08:47:00 -0800 (PST) From: Yury Norov To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, netdev@vger.kernel.org, virtualization@lists.linux.dev, linux-nvme@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-scsi@vger.kernel.org, linux-crypto@vger.kernel.org, Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Madhavan Srinivasan , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Haren Myneni , Rick Lindsley , Nick Child , Thomas Falcon , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?utf-8?q?Eugenio_P=C3=A9rez?= , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , James Smart , Dick Kennedy , "James E.J. Bottomley" , "Martin K. Petersen" , Yury Norov , Rasmus Villemoes , Matt Wu , Steffen Klassert , Daniel Jordan , Andrew Morton , Greg Kurz , Peter Xu , Shrikanth Hegde , Hendrik Brueckner Cc: Bjorn Helgaas Subject: [PATCH v2 06/13] cpumask: re-introduce cpumask_next{,_and}_wrap() Date: Tue, 28 Jan 2025 11:46:35 -0500 Message-ID: <20250128164646.4009-7-yury.norov@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250128164646.4009-1-yury.norov@gmail.com> References: <20250128164646.4009-1-yury.norov@gmail.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 cpumask_next_wrap_old() has two additional parameters, comparing to its generic counterpart find_next_bit_wrap(). The reason for that is historical. Before 4fe49b3b97c262 ("lib/bitmap: introduce for_each_set_bit_wrap() macro"), cpumask_next_wrap() was used to implement for_each_cpu_wrap() iterator. Now that the iterator is an alias to generic for_each_set_bit_wrap(), the additional parameters aren't used and may confuse readers. All existing users call cpumask_next_wrap() in a way that makes it possible to turn it to straight and simple alias to find_next_bit_wrap(). In a couple of places kernel users opencode missing cpumask_next_and_wrap(). Add it as well. CC: Alexander Gordeev CC: Bjorn Helgaas Signed-off-by: Yury Norov --- include/linux/cpumask.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index b267a4f6a917..4f3d8d66e86e 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -284,6 +284,44 @@ unsigned int cpumask_next_and(int n, const struct cpumask *src1p, small_cpumask_bits, n + 1); } +/** + * cpumask_next_and_wrap - get the next cpu in *src1p & *src2p, starting from + * @n+1. If nothing found, wrap around and start from + * the beginning + * @n: the cpu prior to the place to search (i.e. search starts from @n+1) + * @src1p: the first cpumask pointer + * @src2p: the second cpumask pointer + * + * Return: next set bit, wrapped if needed, or >= nr_cpu_ids if @src1p & @src2p is empty. + */ +static __always_inline +unsigned int cpumask_next_and_wrap(int n, const struct cpumask *src1p, + const struct cpumask *src2p) +{ + /* -1 is a legal arg here. */ + if (n != -1) + cpumask_check(n); + return find_next_and_bit_wrap(cpumask_bits(src1p), cpumask_bits(src2p), + small_cpumask_bits, n + 1); +} + +/** + * cpumask_next_wrap - get the next cpu in *src, starting from @n+1. If nothing + * found, wrap around and start from the beginning + * @n: the cpu prior to the place to search (i.e. search starts from @n+1) + * @src: cpumask pointer + * + * Return: next set bit, wrapped if needed, or >= nr_cpu_ids if @src is empty. + */ +static __always_inline +unsigned int cpumask_next_wrap(int n, const struct cpumask *src) +{ + /* -1 is a legal arg here. */ + if (n != -1) + cpumask_check(n); + return find_next_bit_wrap(cpumask_bits(src), small_cpumask_bits, n + 1); +} + /** * for_each_cpu - iterate over every cpu in a mask * @cpu: the (optionally unsigned) integer iterator From patchwork Tue Jan 28 16:46:37 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yury Norov X-Patchwork-Id: 13952803 Received: from mail-yb1-f179.google.com (mail-yb1-f179.google.com [209.85.219.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 803051E008B; Tue, 28 Jan 2025 16:47:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738082826; cv=none; b=ewYSVi3tyjI5R9qU+PHLE09r3wFyl6xONZRBo18FTU4HbF3AI3OWhQAu9smcSGCzcp1UGt7earrqISNOSm29I+Bb8X/OZwOgUglg6sl+x5SB7FtZd4fhXf4x2wbqJ+V3Pf94GgN1sQDLyyTncQ98Z5iHZYFuYqVTGquT38mTG0c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738082826; c=relaxed/simple; bh=BCsADS8qCwD1e69gNU1Cm5Bxoj8mKAeAXvBEhAbM3Ek=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=M7GAKjXMS9Ca++620SZpQO/zrgzoxpaUQ2KQVMi+5xU8Bm3cLm89XrhBif98fI36J+6WDYQj5TxYN9shwlZUo35YlibGxfE9EwxIoVgluuPWlwxOVl5PFWQhlMrcIsD2+QDoUH1pb5lotm857xUOn/YW9fKPFinFNVQhgZWHlik= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Ta67J9X9; arc=none smtp.client-ip=209.85.219.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Ta67J9X9" Received: by mail-yb1-f179.google.com with SMTP id 3f1490d57ef6-e549dd7201cso10651292276.0; Tue, 28 Jan 2025 08:47:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1738082823; x=1738687623; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=SdH2vZp/C+nxP+CvfAKEGQR90YrCTz3RbUsQ2r80bM0=; b=Ta67J9X9qB/JA0KzlGAC/dzOTx2cPL1kfNBHDrgKbgCf0TlzaPTbQtOZnuz2Y1QkcC sLSyD/w3GfO9EyFt9GDe1DPanlyJlR8enuHwri0Dtxfa1j6/70lvRw1UMaf3f5isMmlc 8hBFZAbWHJAeLJU/QctImTIi8DZYJtf/2OzkWQO3fd1Ky4xYcoFoL070jRKKqmaJmMdF A53DrQ+wMheXrOgDm4sXcEnQB+3uKoQAF0r53HYnSFI88TV01FVyySVjDO3F9eMjcGti wZ6pyd4WlpkhfVK856+aeQlogXiRbedHcOmY/bzD2BPzy2RXRn3sM4tJW8XU5X6SGzXJ ZWzg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738082823; x=1738687623; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=SdH2vZp/C+nxP+CvfAKEGQR90YrCTz3RbUsQ2r80bM0=; b=pK3xFunYJzlqSI4wCXnTNdtkoQS3aQM5b1B5ktIuoA8u5uC394rxKTB1aHBvdauA/T 1PnVQQpQ/FgED9A823ZokzZjGuMWJGUGLhWHIc13mPw4uCVozttBDebYnw/ztm5QST+o P2rbyl7DOSXJuC7I3jsT7I1CaKMK58sqm8k3SOdJ3QQkibREazsNYAkjI3qyzs5RQb9B ZY11/Lh7G2Vs1WcelybOqlh5gPVBmSlet7VLK6QwjNG1g+loLO+9ZuUgMwMKzSGfnRmn EpDXWu7gxGBnAMphrmfY2GUPtsW6U9aqjFtLbk2DuAbEWzFQ8PntmMACD9rU6diq5irR ZOSQ== X-Forwarded-Encrypted: i=1; AJvYcCVdav4SG9H9Od4ZlsSXR9/C//plfdjBlJtZwHYfI0408WB8LhMbVMuZaVLDJFW461s+NfuAxM/eOEoGrTo=@vger.kernel.org X-Gm-Message-State: AOJu0YzetT0BzmFHl7sHpkk2NOc7sE5WD0w4iRUwELcUnOpP0KM5tQWL ujXwWRQoo1V3fRIa4U0cGjblrBQc0FkQIem3x4pTqpKLU7XFGyvxCeK4Fs3c X-Gm-Gg: ASbGncuMSo934syeflQc1cL5Rd+Zi/He3I/gUCQROnkTWbNSsjOphwf/xF5FZ8VpZvu qn9On3K4sj44GKt9RRNIaxquu/42bZR0K3gkAl8EhPp4o9SgBkL4pA7nglUnqVthieKXqiYt1Hb vL1JfxFgrdq8U6dAlf/ntp+67JDSL7kdcfcGj11Ym4V2BkUTMWmp5pRUU/20MtL9JahEgZsn5Ri KeH4GJj9+wh/E9Kbwu95I2JjIrfnNeahmjmGnw9IayiJnk9Iis/0xfrqHn40Lhesqt9xp/p6/Cr RzxYGfdl9ctwmqM39eOgxBhcUrXOzXPoymjt3wruEK2M1oEF1L5GJvNuMseZhw== X-Google-Smtp-Source: AGHT+IER7af5NTXpzAcsH7qvdwpTc9wpcM0WTGROlljOkTO/V2PrJ6AJSql0+EdF7q0KvaZDP1xG2Q== X-Received: by 2002:a05:690c:7247:b0:6f6:c875:df2d with SMTP id 00721157ae682-6f6eb677d14mr353519417b3.15.1738082823287; Tue, 28 Jan 2025 08:47:03 -0800 (PST) Received: from localhost (c-73-224-175-84.hsd1.fl.comcast.net. [73.224.175.84]) by smtp.gmail.com with ESMTPSA id 00721157ae682-6f7578778dbsm19590947b3.20.2025.01.28.08.47.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Jan 2025 08:47:02 -0800 (PST) From: Yury Norov To: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, Steffen Klassert , Daniel Jordan Cc: Yury Norov , Christoph Hellwig , Rasmus Villemoes , Herbert Xu Subject: [PATCH v2 08/13] padata: switch padata_find_next() to using cpumask_next_wrap() Date: Tue, 28 Jan 2025 11:46:37 -0500 Message-ID: <20250128164646.4009-9-yury.norov@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250128164646.4009-1-yury.norov@gmail.com> References: <20250128164646.4009-1-yury.norov@gmail.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Calling cpumask_next_wrap_old() with starting CPU == -1 effectively means the request to find next CPU, wrapping around if needed. cpumask_next_wrap() is the proper replacement for that. Acked-by: Herbert Xu Acked-by: Daniel Jordan Signed-off-by: Yury Norov --- kernel/padata.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/padata.c b/kernel/padata.c index 78e202fabf90..b3d4eacc4f5d 100644 --- a/kernel/padata.c +++ b/kernel/padata.c @@ -290,7 +290,7 @@ static struct padata_priv *padata_find_next(struct parallel_data *pd, if (remove_object) { list_del_init(&padata->list); ++pd->processed; - pd->cpu = cpumask_next_wrap_old(cpu, pd->cpumask.pcpu, -1, false); + pd->cpu = cpumask_next_wrap(cpu, pd->cpumask.pcpu); } spin_unlock(&reorder->lock);