chore: allow unexpected-cfgs to address clippy error

Add  to allow unexpected-cfgs on async_io feature

Signed-off-by: Yang Kaiyong <[email protected]>

Author: Yang Kaiyong

Cargo.toml

@@ -73,7 +73,4 @@ targets = [
     "x86_64-unknown-linux-gnu",
     "aarch64-unknown-linux-gnu",
     "aarch64-apple-darwin",
-]
-
-[lints.rust]
-unexpected_cfgs = { level = "warn", check-cfg = ['cfg(testff)'] }
+]

Makefile

@@ -15,10 +15,10 @@ build:
 
 check: build
 	${CARGO} fmt -- --check
-	${CARGO} clippy ${TARGET} --features="fusedev" --no-default-features -- -Dwarnings
-	${CARGO} clippy ${TARGET} --features="virtiofs" --no-default-features -- -Dwarnings
-	${CARGO} clippy ${TARGET} --features="vhost-user-fs" --no-default-features -- -Dwarnings
-	${CARGO} clippy ${TARGET} --features="fusedev,virtiofs" --no-default-features -- -Dwarnings
+	${CARGO} clippy ${TARGET} --features="fusedev" --no-default-features -- -Dwarnings -A unexpected-cfgs
+	${CARGO} clippy ${TARGET} --features="virtiofs" --no-default-features -- -Dwarnings -A unexpected-cfgs
+	${CARGO} clippy ${TARGET} --features="vhost-user-fs" --no-default-features -- -Dwarnings -A unexpected-cfgs
+	${CARGO} clippy ${TARGET} --features="fusedev,virtiofs" --no-default-features -- -Dwarnings -A unexpected-cfgs
 
 test:
 	${CARGO} test ${TARGET} --features="fusedev" --no-default-features -- --nocapture --skip integration

src/transport/virtiofs/mod.rs

@@ -388,7 +388,6 @@ mod async_io {
 
 /// Disabled since vm-virtio doesn't export any DescriptorChain constructors.
 /// Should re-enable once it does.
-#[allow(unexpected_cfgs)]
 #[cfg(testff)]
 mod tests {
     use super::*;