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When building the rust_print sample with CONFIG_JUMP_LABEL=n, the Rust
static key support falls back to using static_key_count. This function
accepts a mutable pointer to the `struct static_key`, but the Rust
abstractions are incorrectly passing a const pointer.
This means that builds using CONFIG_JUMP_LABEL=n and SAMPLE_RUST_PRINT=y
fail with the following error message:
error[E0308]: mismatched types
--> <root>/samples/rust/rust_print_main.rs:87:5
|
87 | / kernel::declare_trace! {
88 | | /// # Safety
89 | | ///
90 | | /// Always safe to call.
91 | | unsafe fn rust_sample_loaded(magic: c_int);
92 | | }
| | ^
| | |
| |_____types differ in mutability
| arguments to this function are incorrect
|
= note: expected raw pointer `*mut kernel::bindings::static_key`
found raw pointer `*const kernel::bindings::static_key`
note: function defined here
--> <root>/rust/bindings/bindings_helpers_generated.rs:33:12
|
33 | pub fn static_key_count(key: *mut static_key) -> c_int;
| ^^^^^^^^^^^^^^^^
To fix this, insert a pointer cast so that the pointer is mutable.
Link: https://lore.kernel.org/20241118202727.73646-1-aliceryhl@google.com
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202411181440.qEdcuyh6-lkp@intel.com/
Fixes:
|
||
|---|---|---|
| .. | ||
| alloc | ||
| block | ||
| init | ||
| list | ||
| net | ||
| sync | ||
| .gitignore | ||
| alloc.rs | ||
| arch_static_branch_asm.rs.S | ||
| block.rs | ||
| build_assert.rs | ||
| device.rs | ||
| error.rs | ||
| firmware.rs | ||
| init.rs | ||
| ioctl.rs | ||
| jump_label.rs | ||
| kunit.rs | ||
| lib.rs | ||
| list.rs | ||
| net.rs | ||
| page.rs | ||
| prelude.rs | ||
| print.rs | ||
| rbtree.rs | ||
| sizes.rs | ||
| static_assert.rs | ||
| std_vendor.rs | ||
| str.rs | ||
| sync.rs | ||
| task.rs | ||
| time.rs | ||
| tracepoint.rs | ||
| types.rs | ||
| uaccess.rs | ||
| workqueue.rs | ||