Revision 231a1e31574e3584cd2c297c98a5afb364715b3a authored by Linus Torvalds on 16 June 2023, 02:50:57 UTC, committed by Linus Torvalds on 16 June 2023, 02:50:57 UTC
Pull regmap fix from Mark Brown: "Another fix for the maple tree cache, Takashi noticed that unlike other caches the maple tree cache didn't check for read only registers before trying to sync which would result in spurious syncs for read only registers where we don't have a default. This was due to the check being open coded in the caches, we now check in the shared 'does this register need sync' function so that is fixed for this and future caches" * tag 'regmap-fix-v6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: regcache: Don't sync read-only registers
compiler_builtins.rs
// SPDX-License-Identifier: GPL-2.0
//! Our own `compiler_builtins`.
//!
//! Rust provides [`compiler_builtins`] as a port of LLVM's [`compiler-rt`].
//! Since we do not need the vast majority of them, we avoid the dependency
//! by providing this file.
//!
//! At the moment, some builtins are required that should not be. For instance,
//! [`core`] has 128-bit integers functionality which we should not be compiling
//! in. We will work with upstream [`core`] to provide feature flags to disable
//! the parts we do not need. For the moment, we define them to [`panic!`] at
//! runtime for simplicity to catch mistakes, instead of performing surgery
//! on `core.o`.
//!
//! In any case, all these symbols are weakened to ensure we do not override
//! those that may be provided by the rest of the kernel.
//!
//! [`compiler_builtins`]: https://github.com/rust-lang/compiler-builtins
//! [`compiler-rt`]: https://compiler-rt.llvm.org/
#![feature(compiler_builtins)]
#![compiler_builtins]
#![no_builtins]
#![no_std]
macro_rules! define_panicking_intrinsics(
($reason: tt, { $($ident: ident, )* }) => {
$(
#[doc(hidden)]
#[export_name = concat!("__rust", stringify!($ident))]
pub extern "C" fn $ident() {
panic!($reason);
}
)*
}
);
define_panicking_intrinsics!("`f32` should not be used", {
__eqsf2,
__gesf2,
__lesf2,
__nesf2,
__unordsf2,
});
define_panicking_intrinsics!("`f64` should not be used", {
__unorddf2,
});
define_panicking_intrinsics!("`i128` should not be used", {
__ashrti3,
__muloti4,
__multi3,
});
define_panicking_intrinsics!("`u128` should not be used", {
__ashlti3,
__lshrti3,
__udivmodti4,
__udivti3,
__umodti3,
});
// NOTE: if you are adding a new intrinsic here, you should also add it to
// `redirect-intrinsics` in `rust/Makefile`.
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