1 files changed, 18 insertions, 11 deletions
diff --git a/library/std/src/sys/sync/mutex/mod.rs b/library/std/src/sys/sync/mutex/mod.rs
index 360df3fc4b5..c885b0eabae 100644
--- a/library/std/src/sys/sync/mutex/mod.rs
+++ b/library/std/src/sys/sync/mutex/mod.rs
@@ -1,5 +1,5 @@
-cfg_if::cfg_if! {
-    if #[cfg(any(
+cfg_select! {
+    any(
         all(target_os = "windows", not(target_vendor = "win7")),
         target_os = "linux",
         target_os = "android",
@@ -8,31 +8,38 @@ cfg_if::cfg_if! {
         target_os = "dragonfly",
         all(target_family = "wasm", target_feature = "atomics"),
         target_os = "hermit",
-    ))] {
+    ) => {
         mod futex;
         pub use futex::Mutex;
-    } else if #[cfg(target_os = "fuchsia")] {
+    }
+    target_os = "fuchsia" => {
         mod fuchsia;
         pub use fuchsia::Mutex;
-    } else if #[cfg(any(
+    }
+    any(
         target_family = "unix",
         target_os = "teeos",
-    ))] {
+    ) => {
         mod pthread;
         pub use pthread::Mutex;
-    } else if #[cfg(all(target_os = "windows", target_vendor = "win7"))] {
+    }
+    all(target_os = "windows", target_vendor = "win7") => {
         mod windows7;
         pub use windows7::{Mutex, raw};
-    } else if #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))] {
+    }
+    all(target_vendor = "fortanix", target_env = "sgx") => {
         mod sgx;
         pub use sgx::Mutex;
-    } else if #[cfg(target_os = "solid_asp3")] {
+    }
+    target_os = "solid_asp3" => {
         mod itron;
         pub use itron::Mutex;
-    } else if #[cfg(target_os = "xous")] {
+    }
+    target_os = "xous" => {
         mod xous;
         pub use xous::Mutex;
-    } else {
+    }
+    _ => {
         mod no_threads;
         pub use no_threads::Mutex;
     }