On Fri, 28 Jun 2024 13:23:31 +0000 Alice Ryhl <aliceryhl@xxxxxxxxxx> wrote: > Add just enough support for static key so that we can use it from > tracepoints. Tracepoints rely on `static_key_false` even though it is > deprecated, so we add the same functionality to Rust. > > It is not possible to use the existing C implementation of > arch_static_branch because it passes the argument `key` to inline > assembly as an 'i' parameter, so any attempt to add a C helper for this > function will fail to compile because the value of `key` must be known > at compile-time. > > Signed-off-by: Alice Ryhl <aliceryhl@xxxxxxxxxx> Reviewed-by: Gary Guo <gary@xxxxxxxxxxx> > --- > rust/kernel/arch/arm64/jump_label.rs | 34 ++++++++++++++++++++++++++++ > rust/kernel/arch/loongarch/jump_label.rs | 35 +++++++++++++++++++++++++++++ > rust/kernel/arch/mod.rs | 24 ++++++++++++++++++++ > rust/kernel/arch/riscv/jump_label.rs | 38 ++++++++++++++++++++++++++++++++ > rust/kernel/arch/x86/jump_label.rs | 35 +++++++++++++++++++++++++++++ > rust/kernel/lib.rs | 2 ++ > rust/kernel/static_key.rs | 32 +++++++++++++++++++++++++++ > scripts/Makefile.build | 2 +- > 8 files changed, 201 insertions(+), 1 deletion(-)
