Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/1.2/patches/2221909/?format=api
{ "id": 2221909, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2221909/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260410120319.197793115@kernel.org/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/1.2/projects/8/?format=api", "name": "Linux ext4 filesystem development", "link_name": "linux-ext4", "list_id": "linux-ext4.vger.kernel.org", "list_email": "linux-ext4@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260410120319.197793115@kernel.org>", "list_archive_url": null, "date": "2026-04-10T12:20:26", "name": "[24/38] ARM: Select ARCH_HAS_RANDOM_ENTROPY", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "64f91334fb736f10262e0502ff3000000371c68a", "submitter": { "id": 92397, "url": "http://patchwork.ozlabs.org/api/1.2/people/92397/?format=api", "name": "Thomas Gleixner", "email": "tglx@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260410120319.197793115@kernel.org/mbox/", "series": [ { "id": 499451, "url": "http://patchwork.ozlabs.org/api/1.2/series/499451/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=499451", "date": "2026-04-10T12:18:27", "name": "treewide: Cleanup LATCH, CLOCK_TICK_RATE and get_cycles() [ab]use", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499451/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2221909/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221909/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=dNY+=CJ=vger.kernel.org=linux-ext4+bounces-15759-patchwork-incoming=ozlabs.org@ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-ext4@vger.kernel.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "patchwork-incoming@ozlabs.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=UacNbv5z;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; helo=mail.ozlabs.org;\n envelope-from=srs0=dny+=cj=vger.kernel.org=linux-ext4+bounces-15759-patchwork-incoming=ozlabs.org@ozlabs.org;\n receiver=patchwork.ozlabs.org)", "gandalf.ozlabs.org;\n arc=pass smtp.remote-ip=\"2600:3c15:e001:75::12fc:5321\"\n arc.chain=subspace.kernel.org", "gandalf.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org", "gandalf.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=UacNbv5z;\n\tdkim-atps=neutral", "gandalf.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; helo=sin.lore.kernel.org;\n envelope-from=linux-ext4+bounces-15759-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=\"UacNbv5z\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=10.30.226.201" ], "Received": [ "from mail.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fsc874NX2z1yGS\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 10 Apr 2026 22:49:43 +1000 (AEST)", "from mail.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3])\n\tby gandalf.ozlabs.org (Postfix) with ESMTP id 4fsc873xYzz4wLW\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 10 Apr 2026 22:49:43 +1000 (AEST)", "by gandalf.ozlabs.org (Postfix)\n\tid 4fsc873s2Tz4wLx; Fri, 10 Apr 2026 22:49:43 +1000 (AEST)", "from sin.lore.kernel.org (sin.lore.kernel.org\n [IPv6:2600:3c15:e001:75::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby gandalf.ozlabs.org (Postfix) with ESMTPS id 4fsc841PtKz4wLW\n\tfor <patchwork-incoming@ozlabs.org>; Fri, 10 Apr 2026 22:49:40 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sin.lore.kernel.org (Postfix) with ESMTP id AD01730C111E\n\tfor <patchwork-incoming@ozlabs.org>; Fri, 10 Apr 2026 12:26:27 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 26FA73DC4BA;\n\tFri, 10 Apr 2026 12:20:30 +0000 (UTC)", "from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org\n [10.30.226.201])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id D217D3CD8B5;\n\tFri, 10 Apr 2026 12:20:29 +0000 (UTC)", "by smtp.kernel.org (Postfix) with ESMTPSA id B8258C2BCAF;\n\tFri, 10 Apr 2026 12:20:28 +0000 (UTC)" ], "ARC-Seal": [ "i=2; a=rsa-sha256; d=ozlabs.org; s=201707; t=1775825383; cv=pass;\n\tb=GDlq2xG5r67OS2/vSSeMVgh7rNamKJkYP2jgY9kj0tRNBVCKXDdtZ5/JUwCp5ptYDkrZHUwrfLbcJgNJfhREFDBtYOerfowCAkJ/rwVnF3uX69qJLoA1RK1OzrU64gBWY0v+vj2a1hwgFomaPlIC6wjyjAhGF3EaVWrLC1l8cmV6cR6BD5mwuNtw8YIqiCFto+yFng+pDlqeJU3yQ7OJ95GrPR8nA2rAgmH4LlgPZOfXHLft8OT23HtW0V5dTWcyveCsTjvXOswQxPGqWIYS+TIFrlxGsO8vIKGWcwZfU3jDZly2FYafRCrG25RgsK09Z1mU/HL4vqq2P/NLIEVFrw==", "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1775823629; cv=none;\n b=fgvGLK9QvpNS98Bhjjb9i0aTw8UZr7f90SuvH9ZMi+Vk2hZlWBZiIJYLNylxpXVVqmmFZ6iqQ75K/6ejzKFn/ynDla28rTlQg52xPyxf6N9cS5FrCSdLc25KENkK2rL+xmBwgMlVN6HkwB9I1mSPXGzjcU8lCaazIqyPZ6Qdngw=" ], "ARC-Message-Signature": [ "i=2; a=rsa-sha256; d=ozlabs.org; s=201707;\n\tt=1775825383; c=relaxed/relaxed;\n\tbh=CLIogZKtxkoQJBct1ivrzjEJ9GwuhZlm0ijU/m5U3Ys=;\n\th=Date:Message-ID:From:To:Cc:Subject:References:MIME-Version:\n\t Content-Type;\n b=xqYXYnzdAh1yNtxyofOobbYuzsVkHGPRmpI/Txwg/mCujoiEm3Qpw1viGZ4LuAyL77z8NyL2u1cKGVaspNShpcRwK0ojPkAFuw8OoPDUCtXWIhUOrWYJAo4zNVFL4ek1Wf6SwPws0O6lzyoGbeCdibVWHipyTxAewOnTbL4SZ2s9Uhpu5YV8DaQE4h+6npYRSrVrXYWx0J7A6d+VsmmaNt8tB11AB0LOVO8JZp+na7nYlM1Hj/fRjbSJtsOkxdYo1afdMOIDnoCjBz7RYWbzbs74mqSyOOiYMrt1X0JKJU5FD7nsJ9Unl90hdoTbFN1Rs3G+j3DW4hFV/x/MybibmQ==", "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1775823629; c=relaxed/simple;\n\tbh=Xj914OB0ywB5KtjAdUFbVTIri4m7J0/9GAWloccpVyg=;\n\th=Date:Message-ID:From:To:Cc:Subject:References:MIME-Version:\n\t Content-Type;\n b=H2GCUz2KT+SoxPKaVXy8PbUO11xism9fwtAnwZeYciKxJ5yDNWqp6Qxcv/fyBHruroV1S/2dMo2plV68PJE/P63fyNuFdIoio0Qgz9Pq6Ia1Om55rtGtGzGUSGICMv+tHDOI9YgF6PacuUwIr/FYBcHzzfYuQnycW4XMI3F4Czo=" ], "ARC-Authentication-Results": [ "i=2; gandalf.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org;\n dkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=UacNbv5z; dkim-atps=neutral;\n spf=pass (client-ip=2600:3c15:e001:75::12fc:5321; helo=sin.lore.kernel.org;\n envelope-from=linux-ext4+bounces-15759-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org) smtp.mailfrom=vger.kernel.org", "i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=UacNbv5z; arc=none smtp.client-ip=10.30.226.201" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775823629;\n\tbh=Xj914OB0ywB5KtjAdUFbVTIri4m7J0/9GAWloccpVyg=;\n\th=Date:From:To:Cc:Subject:References:From;\n\tb=UacNbv5zzA6AzbAlRM4n4U5NaKejyQd8mANj0iWZ5RQiRAJWixjyMgZjbiDhDTyzO\n\t ay62PPnTA47MG/rmdeWa/4KfjNAnW4xtTzJ34RAhThlg0KY8nNByGNrsu9zE469dPQ\n\t hWtTJvAZ4ZE2brA8ZCckIrkzYMvi5clv/chlzjJ3PYteh92RUSFzhMNQu3+ZTJTDCI\n\t kJ6mPTSZ1AZhD1XvkSSEOtM9nEZR/77fxCsYwUjbpiFSE3ESK6EP7pbE6Ao/WrdTRD\n\t AlaT3EdsheI/WmWdaf0zz7rbsJUIcktKioLIztC89PcrEqXmxk39mPCnXjzI5yFh8X\n\t xNx6W4PqnkQAQ==", "Date": "Fri, 10 Apr 2026 14:20:26 +0200", "Message-ID": "<20260410120319.197793115@kernel.org>", "User-Agent": "quilt/0.68", "From": "Thomas Gleixner <tglx@kernel.org>", "To": "LKML <linux-kernel@vger.kernel.org>", "Cc": "Russell King <linux@armlinux.org.uk>,\n linux-arm-kernel@lists.infradead.org,\n Arnd Bergmann <arnd@arndb.de>,\n x86@kernel.org,\n Lu Baolu <baolu.lu@linux.intel.com>,\n iommu@lists.linux.dev,\n Michael Grzeschik <m.grzeschik@pengutronix.de>,\n netdev@vger.kernel.org,\n linux-wireless@vger.kernel.org,\n Herbert Xu <herbert@gondor.apana.org.au>,\n linux-crypto@vger.kernel.org,\n Vlastimil Babka <vbabka@kernel.org>,\n linux-mm@kvack.org,\n David Woodhouse <dwmw2@infradead.org>,\n Bernie Thompson <bernie@plugable.com>,\n linux-fbdev@vger.kernel.org,\n \"Theodore Tso\" <tytso@mit.edu>,\n linux-ext4@vger.kernel.org,\n Andrew Morton <akpm@linux-foundation.org>,\n Uladzislau Rezki <urezki@gmail.com>,\n Marco Elver <elver@google.com>,\n Dmitry Vyukov <dvyukov@google.com>,\n kasan-dev@googlegroups.com,\n Andrey Ryabinin <ryabinin.a.a@gmail.com>,\n Thomas Sailer <t.sailer@alumni.ethz.ch>,\n linux-hams@vger.kernel.org,\n \"Jason A. Donenfeld\" <Jason@zx2c4.com>,\n Richard Henderson <richard.henderson@linaro.org>,\n linux-alpha@vger.kernel.org,\n Catalin Marinas <catalin.marinas@arm.com>,\n Huacai Chen <chenhuacai@kernel.org>,\n loongarch@lists.linux.dev,\n Geert Uytterhoeven <geert@linux-m68k.org>,\n linux-m68k@lists.linux-m68k.org,\n Dinh Nguyen <dinguyen@kernel.org>,\n Jonas Bonn <jonas@southpole.se>,\n linux-openrisc@vger.kernel.org,\n Helge Deller <deller@gmx.de>,\n linux-parisc@vger.kernel.org,\n Michael Ellerman <mpe@ellerman.id.au>,\n linuxppc-dev@lists.ozlabs.org,\n Paul Walmsley <pjw@kernel.org>,\n linux-riscv@lists.infradead.org,\n Heiko Carstens <hca@linux.ibm.com>,\n linux-s390@vger.kernel.org,\n \"David S. Miller\" <davem@davemloft.net>,\n sparclinux@vger.kernel.org", "Subject": "[patch 24/38] ARM: Select ARCH_HAS_RANDOM_ENTROPY", "References": "<20260410120044.031381086@kernel.org>", "Precedence": "bulk", "X-Mailing-List": "linux-ext4@vger.kernel.org", "List-Id": "<linux-ext4.vger.kernel.org>", "List-Subscribe": "<mailto:linux-ext4+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-ext4+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "X-Spam-Status": "No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org" }, "content": "The only remaining usage of get_cycles() is to provide\nrandom_get_entropy().\n\nSwitch ARM over to the new scheme of selecting ARCH_HAS_RANDOM_ENTROPY and\nproviding random_get_entropy() in asm/random.h.\n\nRemove asm/timex.h as it has no functionality anymore.\n\nSigned-off-by: Thomas Gleixner <tglx@kernel.org>\nCc: Russell King <linux@armlinux.org.uk>\nCc: linux-arm-kernel@lists.infradead.org\n---\n arch/arm/Kconfig | 1 +\n arch/arm/include/asm/random.h | 14 ++++++++++++++\n arch/arm/include/asm/timex.h | 18 ------------------\n arch/arm/lib/delay.c | 4 ++--\n 4 files changed, 17 insertions(+), 20 deletions(-)", "diff": "--- a/arch/arm/Kconfig\n+++ b/arch/arm/Kconfig\n@@ -22,6 +22,7 @@ config ARM\n \tselect ARCH_HAS_MEMBARRIER_SYNC_CORE\n \tselect ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE\n \tselect ARCH_HAS_PTE_SPECIAL if ARM_LPAE\n+\tselect ARCH_HAS_RANDOM_ENTROPY\n \tselect ARCH_HAS_SETUP_DMA_OPS\n \tselect ARCH_HAS_SET_MEMORY\n \tselect ARCH_STACKWALK\n--- /dev/null\n+++ b/arch/arm/include/asm/random.h\n@@ -0,0 +1,14 @@\n+/* SPDX-License-Identifier: GPL-2.0-only */\n+#ifndef _ASMARM_RANDOM_H\n+#define _ASMARM_RANDOM_H\n+\n+bool delay_read_timer(unsigned long *t);\n+\n+static inline unsigned long random_get_entropy(void)\n+{\n+\tunsigned long t;\n+\n+\treturn delay_read_timer(&t) ? t : random_get_entropy_fallback();\n+}\n+\n+#endif\n--- a/arch/arm/include/asm/timex.h\n+++ /dev/null\n@@ -1,18 +0,0 @@\n-/* SPDX-License-Identifier: GPL-2.0-only */\n-/*\n- * arch/arm/include/asm/timex.h\n- *\n- * Copyright (C) 1997,1998 Russell King\n- *\n- * Architecture Specific TIME specifications\n- */\n-#ifndef _ASMARM_TIMEX_H\n-#define _ASMARM_TIMEX_H\n-\n-// Temporary workaround\n-bool delay_read_timer(unsigned long *t);\n-\n-#define get_cycles()\t({ cycles_t c; delay_read_timer(&c) ? 0 : c; })\n-#define random_get_entropy() (((unsigned long)get_cycles()) ?: random_get_entropy_fallback())\n-\n-#endif\n--- a/arch/arm/lib/delay.c\n+++ b/arch/arm/lib/delay.c\n@@ -42,9 +42,9 @@ static inline u64 cyc_to_ns(u64 cyc, u32\n \n static void __timer_delay(unsigned long cycles)\n {\n-\tcycles_t start = get_cycles();\n+\tcycles_t start = delay_timer->read_current_timer();\n \n-\twhile ((get_cycles() - start) < cycles)\n+\twhile ((delay_timer->read_current_timer() - start) < cycles)\n \t\tcpu_relax();\n }\n \n", "prefixes": [ "24/38" ] }