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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/interrupt-controller/irq-st.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/interrupt-controller/irq-st.h')
| -rw-r--r-- | include/dt-bindings/interrupt-controller/irq-st.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/dt-bindings/interrupt-controller/irq-st.h b/include/dt-bindings/interrupt-controller/irq-st.h new file mode 100644 index 000000000..9c9c8e2b8 --- /dev/null +++ b/include/dt-bindings/interrupt-controller/irq-st.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * include/linux/irqchip/irq-st.h + * + * Copyright (C) 2014 STMicroelectronics – All Rights Reserved + * + * Author: Lee Jones <lee.jones@linaro.org> + */ + +#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_ST_H +#define _DT_BINDINGS_INTERRUPT_CONTROLLER_ST_H + +#define ST_IRQ_SYSCFG_EXT_0 0 +#define ST_IRQ_SYSCFG_EXT_1 1 +#define ST_IRQ_SYSCFG_EXT_2 2 +#define ST_IRQ_SYSCFG_CTI_0 3 +#define ST_IRQ_SYSCFG_CTI_1 4 +#define ST_IRQ_SYSCFG_PMU_0 5 +#define ST_IRQ_SYSCFG_PMU_1 6 +#define ST_IRQ_SYSCFG_pl310_L2 7 +#define ST_IRQ_SYSCFG_DISABLED 0xFFFFFFFF + +#define ST_IRQ_SYSCFG_EXT_1_INV 0x1 +#define ST_IRQ_SYSCFG_EXT_2_INV 0x2 +#define ST_IRQ_SYSCFG_EXT_3_INV 0x4 + +#endif |