Re: [PATCH v2] rust: kernel: add support for bits/genmask macros

Re: [PATCH v2] rust: kernel: add support for bits/genmask macros

[kernel test robot]

Hi Daniel,

kernel test robot noticed the following build errors:

[auto build test ERROR on 91e21479c81dd4e9e22a78d7446f92f6b96a7284]

url:    https://github.com/intel-lab-lkp/linux/commits/Daniel-Almeida/rust-kernel-add-support-for-bits-genmask-macros/20241024-222614
base:   91e21479c81dd4e9e22a78d7446f92f6b96a7284
patch link:    https://lore.kernel.org/r/20241024-topic-panthor-rs-genmask-v2-1-85237c1f0cea%40collabora.com
patch subject: [PATCH v2] rust: kernel: add support for bits/genmask macros
config: x86_64-buildonly-randconfig-003-20241025 (https://download.01.org/0day-ci/archive/20241025/202410252126.lJKyvEk1-lkp@intel.com/config)
compiler: clang version 19.1.2 (https://github.com/llvm/llvm-project 7ba7d8e2f7b6445b60679da826210cdde29eaf8b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241025/202410252126.lJKyvEk1-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410252126.lJKyvEk1-lkp@intel.com/

All errors (new ones prefixed by >>):

>> error[E0015]: cannot call non-const fn `kunit_get_current_test` in constants
   --> rust/doctests_kernel_generated.rs:317:16
   |
   317 |     let mask = genmask!(39, 21);
   |                ^^^^^^^^^^^^^^^^
   |
   = note: calls in constants are limited to constant functions, tuple structs and tuple variants
   = note: this error originates in the macro `kernel::kunit_assert` which comes from the expansion of the macro `genmask` (in Nightly builds, run with -Z macro-backtrace for more info)
--
>> error: `core::ptr::mut_ptr::<impl *mut T>::is_null` is not yet stable as a const fn
   --> rust/doctests_kernel_generated.rs:317:16
   |
   317 |     let mask = genmask!(39, 21);
   |                ^^^^^^^^^^^^^^^^
   |
   = help: add `#![feature(const_ptr_is_null)]` to the crate attributes to enable
   = note: this error originates in the macro `kernel::kunit_assert` which comes from the expansion of the macro `genmask` (in Nightly builds, run with -Z macro-backtrace for more info)
--
>> error[E0015]: cannot call non-const fn `Arguments::<'_>::new_v1` in constants
   --> rust/doctests_kernel_generated.rs:317:16
   |
   317 |     let mask = genmask!(39, 21);
   |                ^^^^^^^^^^^^^^^^
   |
   = note: calls in constants are limited to constant functions, tuple structs and tuple variants
   = note: this error originates in the macro `format_args` which comes from the expansion of the macro `genmask` (in Nightly builds, run with -Z macro-backtrace for more info)
--
>> error[E0015]: cannot call non-const fn `err` in constants
   --> rust/doctests_kernel_generated.rs:317:16
   |
   317 |     let mask = genmask!(39, 21);
   |                ^^^^^^^^^^^^^^^^
   |
   = note: calls in constants are limited to constant functions, tuple structs and tuple variants
   = note: this error originates in the macro `kernel::kunit_assert` which comes from the expansion of the macro `genmask` (in Nightly builds, run with -Z macro-backtrace for more info)
--
>> error: `Arguments::<'a>::new_const` is not yet stable as a const fn
   --> rust/doctests_kernel_generated.rs:317:16
   |
   317 |     let mask = genmask!(39, 21);
   |                ^^^^^^^^^^^^^^^^
   |
   = help: add `#![feature(const_fmt_arguments_new)]` to the crate attributes to enable
   = note: this error originates in the macro `format_args` which comes from the expansion of the macro `genmask` (in Nightly builds, run with -Z macro-backtrace for more info)
--
>> error[E0658]: referencing statics in constants is unstable
   --> rust/doctests_kernel_generated.rs:317:16
   |
   317 |     let mask = genmask!(39, 21);
   |                ^^^^^^^^^^^^^^^^
   |
   = note: see issue #119618 <https://github.com/rust-lang/rust/issues/119618> for more information
   = help: add `#![feature(const_refs_to_static)]` to the crate attributes to enable
   = note: this compiler was built on 2024-04-29; consider upgrading it if it is out of date
   = note: `static` and `const` variables can refer to other `const` variables. A `const` variable, however, cannot refer to a `static` variable.
   = help: to fix this, the value can be extracted to a `const` and then used.
   = note: this error originates in the macro `kernel::kunit_assert` which comes from the expansion of the macro `genmask` (in Nightly builds, run with -Z macro-backtrace for more info)
--
>> error[E0015]: cannot call non-const fn `__kunit_do_failed_assertion` in constants
   --> rust/doctests_kernel_generated.rs:317:16
   |
   317 |     let mask = genmask!(39, 21);
   |                ^^^^^^^^^^^^^^^^
   |
   = note: calls in constants are limited to constant functions, tuple structs and tuple variants
   = note: this error originates in the macro `kernel::kunit_assert` which comes from the expansion of the macro `genmask` (in Nightly builds, run with -Z macro-backtrace for more info)
--
>> error[E0015]: cannot call non-const fn `__kunit_abort` in constants
   --> rust/doctests_kernel_generated.rs:317:16
   |
   317 |     let mask = genmask!(39, 21);
   |                ^^^^^^^^^^^^^^^^
   |
   = note: calls in constants are limited to constant functions, tuple structs and tuple variants
   = note: this error originates in the macro `kernel::kunit_assert` which comes from the expansion of the macro `genmask` (in Nightly builds, run with -Z macro-backtrace for more info)
--
>> error[E0015]: cannot call non-const formatting macro in constants
   --> rust/doctests_kernel_generated.rs:317:16
   |
   317 |     let mask = genmask!(39, 21);
   |                ^^^^^^^^^^^^^^^^
   |
   = note: calls in constants are limited to constant functions, tuple structs and tuple variants
   = note: this error originates in the macro `format_args` which comes from the expansion of the macro `genmask` (in Nightly builds, run with -Z macro-backtrace for more info)

-- 
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