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GET /api/patches/2221819/?format=api
{ "id": 2221819, "url": "http://patchwork.ozlabs.org/api/patches/2221819/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260410120318.929806643@kernel.org/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260410120318.929806643@kernel.org>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260410120318.929806643@kernel.org/", "date": "2026-04-10T12:20:06", "name": "[20/38] kasan: sw_tags: Replace get_cycles() by random_get_entropy()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "cdce52131c5094d58da7697d21ed7cfc18118b7e", "submitter": { "id": 92397, "url": "http://patchwork.ozlabs.org/api/people/92397/?format=api", "name": "Thomas Gleixner", "email": "tglx@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260410120318.929806643@kernel.org/mbox/", "series": [ { "id": 499449, "url": "http://patchwork.ozlabs.org/api/series/499449/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=499449", "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/499449/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2221819/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221819/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19590-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.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=SEmycwX5;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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Fri, 10 Apr 2026 22:20:59 +1000 (AEST)", "from boromir.ozlabs.org (localhost [127.0.0.1])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 4fsbV42VF7z2yqf;\n\tFri, 10 Apr 2026 22:20:12 +1000 (AEST)", "from tor.source.kernel.org (tor.source.kernel.org\n [IPv6:2600:3c04:e001:324:0:1991:8:25])\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 lists.ozlabs.org (Postfix) with ESMTPS id 4fsbV35jbWz2yZ6\n\tfor <linuxppc-dev@lists.ozlabs.org>; Fri, 10 Apr 2026 22:20:11 +1000 (AEST)", "from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58])\n\tby tor.source.kernel.org (Postfix) with ESMTP id BC2056132F;\n\tFri, 10 Apr 2026 12:20:09 +0000 (UTC)", "by smtp.kernel.org (Postfix) with ESMTPSA id 97CA3C19425;\n\tFri, 10 Apr 2026 12:20:08 +0000 (UTC)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1775823612;\n\tcv=none;\n b=QuHHUXaiZoxxbIOS5gjeSQXlTJ+rUtNEi0ysPYvaSmJE09sUFEB9TVqOkPyvhZgkkbVqF51uM9qIfKzhwjW17zd9gwBv9SwKefZKEHghsZlXdGKdD5KkTuxkEEILmbf44Ywh6FgElWRUUnsWoPRGpSkZq6oYB8QAkslya9gZoR3cIl9Kcglj4rEXtcnNinwnyp16xj4nP6lgJfkcCePubWl7c5FF2pWlHum8+Dp7mgJOTECr680lYWaTJ6FSINmIYeuRIK/rqp9NJuv6ZCL3biTl0ps0Pmdyf/OBzfKQe8804FWv92Qvqzrxg403IXOa1ZekvRC1vF2XpeOdxeo/KQ==", "ARC-Message-Signature": "i=1; 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a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775823609;\n\tbh=UKj6WoZFsTQfNpLsa4hK9AJwWp/c6TyAgfAmmgBM2Aw=;\n\th=Date:From:To:Cc:Subject:References:From;\n\tb=SEmycwX5s0//+gtSPktg47GJS+8sJlwAPsv65Bq7Wv5tg7uQL3Gpghd9FaOczcWIN\n\t ZQaCuA/qh+jNH/riNYpmVLmwYhqyjM2JbqnNtt1yhbGBg3HT7iCiqP6g94wS0wTPIA\n\t 99ougHo5Nu9h67SjSnTNqyHC+/lIAAGR6p7tHCAck6aAnXmlbTDue5R1sT+DZ/waOZ\n\t GXIvFpg3p1ueseORBf9eozHpgJ3jpkMWN+atB0UvtcxRk8vKXhCteFgdwrDai6rThh\n\t FHU0CtO/nkzQnAaFOlH62oLpy9zcH9gwc0II0cebCdnPQhGplJ3L9nz1drcdz9bKdB\n\t 3Oc5+96qoKgtw==", "Date": "Fri, 10 Apr 2026 14:20:06 +0200", "Message-ID": "<20260410120318.929806643@kernel.org>", "User-Agent": "quilt/0.68", "From": "Thomas Gleixner <tglx@kernel.org>", "To": "LKML <linux-kernel@vger.kernel.org>", "Cc": "Andrey Ryabinin <ryabinin.a.a@gmail.com>,\n kasan-dev@googlegroups.com,\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 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 Russell King <linux@armlinux.org.uk>,\n linux-arm-kernel@lists.infradead.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 20/38] kasan: sw_tags: Replace get_cycles() by\n random_get_entropy()", "References": "<20260410120044.031381086@kernel.org>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,\n\tDKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "Seeding the random state with get_cycles() is functionally equivalent on\nthe architectures which provide get_cycles(), but it does not make sense\nsemantically.\n\nUse random_get_entropy() instead, which is the proper interface.\n\nThis is part of a larger effort to remove get_cycles() usage from\nnon-architecture code.\n\nSigned-off-by: Thomas Gleixner <tglx@kernel.org>\nCc: Andrey Ryabinin <ryabinin.a.a@gmail.com>\nCc: kasan-dev@googlegroups.com\n---\n mm/kasan/sw_tags.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "--- a/mm/kasan/sw_tags.c\n+++ b/mm/kasan/sw_tags.c\n@@ -41,7 +41,7 @@ void __init kasan_init_sw_tags(void)\n \tint cpu;\n \n \tfor_each_possible_cpu(cpu)\n-\t\tper_cpu(prng_state, cpu) = (u32)get_cycles();\n+\t\tper_cpu(prng_state, cpu) = (u32)random_get_entropy();\n \n \tkasan_init_tags();\n \tkasan_enable();\n", "prefixes": [ "20/38" ] }