{"id":2221899,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2221899/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260410120319.853669871@kernel.org/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/1.2/projects/8/?format=json","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":"<20260410120319.853669871@kernel.org>","list_archive_url":null,"date":"2026-04-10T12:21:14","name":"[34/38] riscv: Select ARCH_HAS_RANDOM_ENTROPY","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"803b6db118cf7e2d2667604e2f7270ce26860ce8","submitter":{"id":92397,"url":"http://patchwork.ozlabs.org/api/1.2/people/92397/?format=json","name":"Thomas Gleixner","email":"tglx@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260410120319.853669871@kernel.org/mbox/","series":[{"id":499451,"url":"http://patchwork.ozlabs.org/api/1.2/series/499451/?format=json","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/2221899/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2221899/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","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=OA4RjUak;\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; 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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=1775823677;\n\tbh=8aVhqN+bsjtC+8iOVhItTcCo4nE5t4ex+cjOCvHOROg=;\n\th=Date:From:To:Cc:Subject:References:From;\n\tb=OA4RjUakSKbHP7uZl9Rn6aI/7Qts08y1gdCxG4212yNJdVKaYLulTRlHhQ1giBOu6\n\t tARhrIBIltPo7n2ZqupgbCjM222ynMbD+JMBXCcsIED9ns8vEth54JFbieyU26o9rm\n\t KoQTgfYyoH0jSRf5j3OQodGQDBBjhAykp4Hy5bQdfGP0P88P76fnb883frBXWWU03q\n\t P/YOEYqjXf/L4ccO74xjFbM3qOQBRFdrvTUVXM6TfNVPJX1ACluXAp6rS0x+D02XQB\n\t ZfqSCQC8dN3KdQ34VmPvfFKRcfafCQ6soBJ+KtAS56vLrMJXpWDVh/K6XVrYMUGmaP\n\t YaxQP6ppalRew==","Date":"Fri, 10 Apr 2026 14:21:14 +0200","Message-ID":"<20260410120319.853669871@kernel.org>","User-Agent":"quilt/0.68","From":"Thomas Gleixner ","To":"LKML ","Cc":"Paul Walmsley ,\n linux-riscv@lists.infradead.org,\n Arnd Bergmann ,\n x86@kernel.org,\n Lu Baolu ,\n iommu@lists.linux.dev,\n Michael Grzeschik ,\n netdev@vger.kernel.org,\n linux-wireless@vger.kernel.org,\n Herbert Xu ,\n linux-crypto@vger.kernel.org,\n Vlastimil Babka ,\n linux-mm@kvack.org,\n David Woodhouse ,\n Bernie Thompson ,\n linux-fbdev@vger.kernel.org,\n \"Theodore Tso\" ,\n linux-ext4@vger.kernel.org,\n Andrew Morton ,\n Uladzislau Rezki ,\n Marco Elver ,\n Dmitry Vyukov ,\n kasan-dev@googlegroups.com,\n Andrey Ryabinin ,\n Thomas Sailer ,\n linux-hams@vger.kernel.org,\n \"Jason A. Donenfeld\" ,\n Richard Henderson ,\n linux-alpha@vger.kernel.org,\n Russell King ,\n linux-arm-kernel@lists.infradead.org,\n Catalin Marinas ,\n Huacai Chen ,\n loongarch@lists.linux.dev,\n Geert Uytterhoeven ,\n linux-m68k@lists.linux-m68k.org,\n Dinh Nguyen ,\n Jonas Bonn ,\n linux-openrisc@vger.kernel.org,\n Helge Deller ,\n linux-parisc@vger.kernel.org,\n Michael Ellerman ,\n linuxppc-dev@lists.ozlabs.org,\n Heiko Carstens ,\n linux-s390@vger.kernel.org,\n \"David S. Miller\" ,\n sparclinux@vger.kernel.org","Subject":"[patch 34/38] riscv: Select ARCH_HAS_RANDOM_ENTROPY","References":"<20260410120044.031381086@kernel.org>","Precedence":"bulk","X-Mailing-List":"linux-ext4@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","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 non-architecture usage of get_cycles() is to provide\nrandom_get_entropy().\n\nSwitch riscv over to the new scheme of selecting ARCH_HAS_RANDOM_ENTROPY\nand providing random_get_entropy() in asm/random.h.\n\nAdd 'asm/timex.h' includes to the relevant files, so the global include can\nbe removed once all architectures are converted over.\n\nSigned-off-by: Thomas Gleixner \nCc: Paul Walmsley \nCc: linux-riscv@lists.infradead.org\n---\n arch/riscv/Kconfig | 1 +\n arch/riscv/include/asm/random.h | 25 +++++++++++++++++++++++++\n arch/riscv/include/asm/timex.h | 13 -------------\n arch/riscv/kernel/unaligned_access_speed.c | 1 +\n arch/riscv/kvm/vcpu_timer.c | 1 +\n arch/riscv/lib/delay.c | 1 +\n 6 files changed, 29 insertions(+), 13 deletions(-)","diff":"--- a/arch/riscv/Kconfig\n+++ b/arch/riscv/Kconfig\n@@ -47,6 +47,7 @@ config RISCV\n \tselect ARCH_HAS_PREPARE_SYNC_CORE_CMD\n \tselect ARCH_HAS_PTDUMP if MMU\n \tselect ARCH_HAS_PTE_SPECIAL\n+\tselect ARCH_HAS_RANDOM_ENTROPY\n \tselect ARCH_HAS_SET_DIRECT_MAP if MMU\n \tselect ARCH_HAS_SET_MEMORY if MMU\n \tselect ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL\n--- /dev/null\n+++ b/arch/riscv/include/asm/random.h\n@@ -0,0 +1,25 @@\n+/* SPDX-License-Identifier: GPL-2.0-only */\n+#ifndef _ASM_RISCV_RANDOM_H\n+#define _ASM_RISCV_RANDOM_H\n+\n+#include \n+\n+#ifdef CONFIG_RISCV_M_MODE\n+/*\n+ * Much like MIPS, we may not have a viable counter to use at an early point\n+ * in the boot process. Unfortunately we don't have a fallback, so instead\n+ * invoke the fallback function.\n+ */\n+static inline unsigned long random_get_entropy(void)\n+{\n+\tif (unlikely(clint_time_val == NULL))\n+\t\treturn random_get_entropy_fallback();\n+\treturn get_cycles();\n+}\n+#else /* !CONFIG_RISCV_M_MODE */\n+static inline unsigned long random_get_entropy(void)\n+{\n+\treturn get_cycles();\n+}\n+#endif /* CONFIG_RISCV_M_MODE */\n+#endif /* _ASM_RISCV_RANDOM_H */\n--- a/arch/riscv/include/asm/timex.h\n+++ b/arch/riscv/include/asm/timex.h\n@@ -31,19 +31,6 @@ static inline u32 get_cycles_hi(void)\n #define get_cycles_hi get_cycles_hi\n #endif /* CONFIG_64BIT */\n \n-/*\n- * Much like MIPS, we may not have a viable counter to use at an early point\n- * in the boot process. Unfortunately we don't have a fallback, so instead\n- * we just return 0.\n- */\n-static inline unsigned long random_get_entropy(void)\n-{\n-\tif (unlikely(clint_time_val == NULL))\n-\t\treturn random_get_entropy_fallback();\n-\treturn get_cycles();\n-}\n-#define random_get_entropy()\trandom_get_entropy()\n-\n #else /* CONFIG_RISCV_M_MODE */\n \n static inline cycles_t get_cycles(void)\n--- a/arch/riscv/kernel/unaligned_access_speed.c\n+++ b/arch/riscv/kernel/unaligned_access_speed.c\n@@ -12,6 +12,7 @@\n #include \n #include \n #include \n+#include \n #include \n \n #include \"copy-unaligned.h\"\n--- a/arch/riscv/kvm/vcpu_timer.c\n+++ b/arch/riscv/kvm/vcpu_timer.c\n@@ -14,6 +14,7 @@\n #include \n #include \n #include \n+#include \n \n static u64 kvm_riscv_current_cycles(struct kvm_guest_timer *gt)\n {\n--- a/arch/riscv/lib/delay.c\n+++ b/arch/riscv/lib/delay.c\n@@ -10,6 +10,7 @@\n #include \n \n #include \n+#include \n \n /*\n * This is copies from arch/arm/include/asm/delay.h\n","prefixes":["34/38"]}