{"id":2228356,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2228356/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260426085725.2090827-6-mkchauras@gmail.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.1/projects/2/?format=json","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/"},"msgid":"<20260426085725.2090827-6-mkchauras@gmail.com>","date":"2026-04-26T08:57:23","name":"[V14,5/7] rust: Make __udivdi3() and __umoddi3() panic","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"bac85ffb606b7053a0f48d73d160b9aa62b8a6f7","submitter":{"id":92575,"url":"http://patchwork.ozlabs.org/api/1.1/people/92575/?format=json","name":"Mukesh Kumar Chaurasiya","email":"mkchauras@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260426085725.2090827-6-mkchauras@gmail.com/mbox/","series":[{"id":501515,"url":"http://patchwork.ozlabs.org/api/1.1/series/501515/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=501515","date":"2026-04-26T08:57:18","name":"Rust support for powerpc","version":14,"mbox":"http://patchwork.ozlabs.org/series/501515/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2228356/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2228356/checks/","tags":{},"headers":{"Return-Path":"\n ","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=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=d0ylMLxf;\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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charset=UTF-8","Content-Transfer-Encoding":"8bit","X-Spam-Status":"No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,\n\tSPF_HELO_NONE,SPF_PASS autolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"},"content":"From: Link Mauve \n\nThe core crate currently depends on these two functions for i64/u64/\ni128/u128/core::time::Duration formatting, but we shouldn’t use that in\nthe kernel so let’s panic if they are ever called.\n\nThis doesn’t yet fix drm_panic_qr.rs, which also uses __udivdi3 when\nCONFIG_CC_OPTIMIZE_FOR_SIZE=y, but at least makes the rest of the kernel\nbuild on PPC32.\n\nSigned-off-by: Link Mauve \nSigned-off-by: Mukesh Kumar Chaurasiya (IBM) \n---\n rust/Makefile | 4 ++++\n rust/compiler_builtins.rs | 6 ++++++\n 2 files changed, 10 insertions(+)","diff":"diff --git a/rust/Makefile b/rust/Makefile\nindex f6369d121c50..9aa18cff2fae 100644\n--- a/rust/Makefile\n+++ b/rust/Makefile\n@@ -615,6 +615,10 @@ ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),)\n \t\t__ashrti3 \\\n \t\t__ashlti3 __lshrti3\n endif\n+ifdef CONFIG_PPC32\n+\tredirect-intrinsics += \\\n+\t\t__udivdi3 __umoddi3\n+endif\n \n ifdef CONFIG_MODVERSIONS\n cmd_gendwarfksyms = $(if $(skip_gendwarfksyms),, \\\ndiff --git a/rust/compiler_builtins.rs b/rust/compiler_builtins.rs\nindex dd16c1dc899c..fc6b54636dd5 100644\n--- a/rust/compiler_builtins.rs\n+++ b/rust/compiler_builtins.rs\n@@ -97,5 +97,11 @@ pub extern \"C\" fn $ident() {\n __aeabi_uldivmod,\n });\n \n+#[cfg(target_arch = \"powerpc\")]\n+define_panicking_intrinsics!(\"`u64` division/modulo should not be used\", {\n+ __udivdi3,\n+ __umoddi3,\n+});\n+\n // NOTE: if you are adding a new intrinsic here, you should also add it to\n // `redirect-intrinsics` in `rust/Makefile`.\n","prefixes":["V14","5/7"]}