While we already have the `warn_on` macro, a common usage patterns in Rust is to check whether a `Result` is an error. Add a helper macro that allows this.
Signed-off-by: Alexandre Courbot <[email protected]> --- rust/kernel/bug.rs | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/rust/kernel/bug.rs b/rust/kernel/bug.rs index 36aef43e5ebe..255c780bb4f7 100644 --- a/rust/kernel/bug.rs +++ b/rust/kernel/bug.rs @@ -124,3 +124,13 @@ macro_rules! warn_on { cond }}; } + +/// Report a warning if `res` is an error and return it unmodified. +#[macro_export] +macro_rules! warn_on_err { + ($res:expr) => {{ + let res = $res; + let _ = $crate::warn_on!(res.is_err()); + res + }}; +} -- 2.52.0
