From 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Sun, 16 Aug 2026 15:32:33 +0200 Subject: kbuild: rust: keep Rust objects out of Clang LTO with inline helpers Under `CONFIG_LTO_CLANG` + `CONFIG_RUST_INLINE_HELPERS`, one may hit `objtool` errors such as: vmlinux.o: error: objtool: _R..._3Gsp4boot+0xd6a: can't find jump dest instruction at .text._R..._3Gsp4boot+0x1dfd The reason is that in such builds, the Clang invocation that compiles the combined Rust plus helpers bitcode emits LLVM bitcode (again) -- the final code generation happens in the linker's LTO step, which the `-mllvm` trap options passed to Clang do not reach. This, in turn, means that unreachable traps are missing, and the impossible paths do not merely fallthrough to the next symbol, but past the end of their own section, since LTO builds place each function in its own section. Thus filter `CC_FLAGS_LTO` out of the Clang invocation, so that it always emits machine code directly, with the traps in place. Assisted-by: LLM Cc: Gary Guo Cc: Boqun Feng Cc: Alice Ryhl Cc: Matthew Maurer Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: stable@vger.kernel.org Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust") Acked-by: Gary Guo Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- sound/soc/sof/sof-of-dev.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 sound/soc/sof/sof-of-dev.h (limited to 'sound/soc/sof/sof-of-dev.h') diff --git a/sound/soc/sof/sof-of-dev.h b/sound/soc/sof/sof-of-dev.h new file mode 100644 index 000000000..b6cc70595 --- /dev/null +++ b/sound/soc/sof/sof-of-dev.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * Copyright 2021 NXP + */ + +#ifndef __SOUND_SOC_SOF_OF_H +#define __SOUND_SOC_SOF_OF_H + +struct snd_sof_of_mach { + const char *compatible; + const char *drv_name; + const char *fw_filename; + const char *sof_tplg_filename; +}; + +extern const struct dev_pm_ops sof_of_pm; + +int sof_of_probe(struct platform_device *pdev); +void sof_of_remove(struct platform_device *pdev); +void sof_of_shutdown(struct platform_device *pdev); + +#endif -- cgit v1.3.1