cleanup some test cfg

Author: RalfJung

src/tools/miri/tests/pass-dep/shims/libc-misc.rs

@@ -87,7 +87,7 @@ fn test_posix_realpath_errors() {
     assert_eq!(e.kind(), ErrorKind::NotFound);
 }
 
-#[cfg(any(target_os = "linux"))]
+#[cfg(target_os = "linux")]
 fn test_posix_fadvise() {
     use std::convert::TryInto;
     use std::io::Write;
@@ -115,7 +115,7 @@ fn test_posix_fadvise() {
     assert_eq!(result, 0);
 }
 
-#[cfg(any(target_os = "linux"))]
+#[cfg(target_os = "linux")]
 fn test_sync_file_range() {
     use std::io::Write;
 
@@ -181,7 +181,7 @@ fn test_thread_local_errno() {
 }
 
 /// Tests whether clock support exists at all
-#[cfg(any(target_os = "linux"))]
+#[cfg(target_os = "linux")]
 fn test_clocks() {
     let mut tp = std::mem::MaybeUninit::<libc::timespec>::uninit();
     let is_error = unsafe { libc::clock_gettime(libc::CLOCK_REALTIME, tp.as_mut_ptr()) };
@@ -283,23 +283,21 @@ fn test_posix_mkstemp() {
 }
 
 fn main() {
-    #[cfg(any(target_os = "linux"))]
-    test_posix_fadvise();
-
     test_posix_gettimeofday();
     test_posix_mkstemp();
 
     test_posix_realpath_alloc();
     test_posix_realpath_noalloc();
     test_posix_realpath_errors();
 
-    #[cfg(any(target_os = "linux"))]
-    test_sync_file_range();
-
     test_thread_local_errno();
 
-    #[cfg(any(target_os = "linux"))]
-    test_clocks();
-
     test_isatty();
+
+    #[cfg(target_os = "linux")]
+    {
+        test_posix_fadvise();
+        test_sync_file_range();
+        test_clocks();
+    }
 }

src/tools/miri/tests/pass-dep/shims/pthreads.rs

@@ -10,7 +10,7 @@ fn main() {
     test_rwlock_libc_static_initializer();
     test_named_thread_truncation();
 
-    #[cfg(any(target_os = "linux"))]
+    #[cfg(target_os = "linux")]
     test_mutex_libc_static_initializer_recursive();
 }