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| author | Miguel Ojeda <ojeda@kernel.org> | 2026-08-16 15:32:33 +0200 |
|---|---|---|
| committer | Miguel Ojeda <ojeda@kernel.org> | 2026-08-23 21:27:17 +0200 |
| commit | 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 (patch) | |
| tree | 93a1ed1d337bc53adf1e572c2586d347703b286e /include/dt-bindings/reset/ti-syscon.h | |
| download | linux-stable-5febf432df1cfa5b25d99b54c32103fafbdd0eb9.tar.gz linux-stable-5febf432df1cfa5b25d99b54c32103fafbdd0eb9.zip | |
kbuild: rust: keep Rust objects out of Clang LTO with inline helpersgrafted
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 <gary@garyguo.net>
Cc: Boqun Feng <boqun@kernel.org>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Matthew Maurer <mmaurer@google.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust")
Acked-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Diffstat (limited to 'include/dt-bindings/reset/ti-syscon.h')
| -rw-r--r-- | include/dt-bindings/reset/ti-syscon.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/dt-bindings/reset/ti-syscon.h b/include/dt-bindings/reset/ti-syscon.h new file mode 100644 index 000000000..eacc0f180 --- /dev/null +++ b/include/dt-bindings/reset/ti-syscon.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * TI Syscon Reset definitions + * + * Copyright (C) 2015-2016 Texas Instruments Incorporated - https://www.ti.com/ + */ + +#ifndef __DT_BINDINGS_RESET_TI_SYSCON_H__ +#define __DT_BINDINGS_RESET_TI_SYSCON_H__ + +/* + * The reset does not support the feature and corresponding + * values are not valid + */ +#define ASSERT_NONE (1 << 0) +#define DEASSERT_NONE (1 << 1) +#define STATUS_NONE (1 << 2) + +/* When set this function is activated by setting(vs clearing) this bit */ +#define ASSERT_SET (1 << 3) +#define DEASSERT_SET (1 << 4) +#define STATUS_SET (1 << 5) + +/* The following are the inverse of the above and are added for consistency */ +#define ASSERT_CLEAR (0 << 3) +#define DEASSERT_CLEAR (0 << 4) +#define STATUS_CLEAR (0 << 5) + +#endif |