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The `firmware` field of the `module!` only accepts literal strings, which is due to the fact that it is implemented as a proc macro. Some drivers require a lot of firmware files (such as nova-core) and hence benefit from more flexibility composing firmware path strings. The `firmware::ModInfoBuilder` is a helper component to flexibly compose firmware path strings for the .modinfo section in const context. It is meant to be used in combination with `kernel::module_firmware!`. Co-developed-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Link: https://lore.kernel.org/r/20250306222336.23482-3-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>