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[ Upstream commit7dd34dfc8d] If `CONFIG_PRINTK` is not set, then the following warnings are issued during build: warning: unused variable: `args` --> ../rust/kernel/kunit.rs:16:12 | 16 | pub fn err(args: fmt::Arguments<'_>) { | ^^^^ help: if this is intentional, prefix it with an underscore: `_args` | = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default warning: unused variable: `args` --> ../rust/kernel/kunit.rs:32:13 | 32 | pub fn info(args: fmt::Arguments<'_>) { | ^^^^ help: if this is intentional, prefix it with an underscore: `_args` Fix this by adding a no-op assignment using `args` when `CONFIG_PRINTK` is not set. Fixes:a66d733da8("rust: support running Rust documentation tests as KUnit ones") Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: David Gow <david@davidgow.net> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>