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 C075E3BF677; Fri, 10 Apr 2026 12:20:09 +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=1775823609; cv=none; b=fYKHoVuCywDnRDrT3jXANcox+cmjE8gx34yzXJr5NC4KTFnBXIrfsII8PTnWJLKJrskisrlCQyVh4nMpYrBPN+HOYbIBmwqR7sHJplBjxVBhq7FTBGCJdbVrAltZbJyYKy6u8JTIWv2X8mhtkgw8WKOb3u+mmHBQgcdnMluhGP4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775823609; c=relaxed/simple; bh=UKj6WoZFsTQfNpLsa4hK9AJwWp/c6TyAgfAmmgBM2Aw=; h=Date:Message-ID:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=Q5Dk+UZYkVYtIgMsX39fEcffPAkPHN9RhmTxmsnqL0JNu/qL2eCjOpy6m3IoDttALBoXQyBCDFVSTcnUU8XyFxwxgfa1GSVv6QAz+/R/mBM6ArzLqqHcTMqRe3+UnI5f+G1GLAwsSaDDVG7hFKkqxSGmsKruQK2Ems1h7xrEcgA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SEmycwX5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SEmycwX5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 97CA3C19425; Fri, 10 Apr 2026 12:20:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775823609; bh=UKj6WoZFsTQfNpLsa4hK9AJwWp/c6TyAgfAmmgBM2Aw=; h=Date:From:To:Cc:Subject:References:From; b=SEmycwX5s0//+gtSPktg47GJS+8sJlwAPsv65Bq7Wv5tg7uQL3Gpghd9FaOczcWIN ZQaCuA/qh+jNH/riNYpmVLmwYhqyjM2JbqnNtt1yhbGBg3HT7iCiqP6g94wS0wTPIA 99ougHo5Nu9h67SjSnTNqyHC+/lIAAGR6p7tHCAck6aAnXmlbTDue5R1sT+DZ/waOZ GXIvFpg3p1ueseORBf9eozHpgJ3jpkMWN+atB0UvtcxRk8vKXhCteFgdwrDai6rThh FHU0CtO/nkzQnAaFOlH62oLpy9zcH9gwc0II0cebCdnPQhGplJ3L9nz1drcdz9bKdB 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 To: LKML Cc: Andrey Ryabinin , kasan-dev@googlegroups.com, Arnd Bergmann , x86@kernel.org, Lu Baolu , iommu@lists.linux.dev, Michael Grzeschik , netdev@vger.kernel.org, linux-wireless@vger.kernel.org, Herbert Xu , linux-crypto@vger.kernel.org, Vlastimil Babka , linux-mm@kvack.org, David Woodhouse , Bernie Thompson , linux-fbdev@vger.kernel.org, "Theodore Tso" , linux-ext4@vger.kernel.org, Andrew Morton , Uladzislau Rezki , Marco Elver , Dmitry Vyukov , Thomas Sailer , linux-hams@vger.kernel.org, "Jason A. Donenfeld" , Richard Henderson , linux-alpha@vger.kernel.org, Russell King , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Huacai Chen , loongarch@lists.linux.dev, Geert Uytterhoeven , linux-m68k@lists.linux-m68k.org, Dinh Nguyen , Jonas Bonn , linux-openrisc@vger.kernel.org, Helge Deller , linux-parisc@vger.kernel.org, Michael Ellerman , linuxppc-dev@lists.ozlabs.org, Paul Walmsley , linux-riscv@lists.infradead.org, Heiko Carstens , linux-s390@vger.kernel.org, "David S. Miller" , sparclinux@vger.kernel.org Subject: [patch 20/38] kasan: sw_tags: Replace get_cycles() by random_get_entropy() References: <20260410120044.031381086@kernel.org> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Seeding the random state with get_cycles() is functionally equivalent on the architectures which provide get_cycles(), but it does not make sense semantically. Use random_get_entropy() instead, which is the proper interface. This is part of a larger effort to remove get_cycles() usage from non-architecture code. Signed-off-by: Thomas Gleixner Cc: Andrey Ryabinin Cc: kasan-dev@googlegroups.com --- mm/kasan/sw_tags.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/kasan/sw_tags.c +++ b/mm/kasan/sw_tags.c @@ -41,7 +41,7 @@ void __init kasan_init_sw_tags(void) int cpu; for_each_possible_cpu(cpu) - per_cpu(prng_state, cpu) = (u32)get_cycles(); + per_cpu(prng_state, cpu) = (u32)random_get_entropy(); kasan_init_tags(); kasan_enable();