Merge "Comment on the status of ATOMIC_VAR_INIT() in the POSIX test." into main am: 7033a1462e

Original change: https://android-review.googlesource.com/c/platform/bionic/+/3528730

Change-Id: I8bfdff32254015ecb669b38d89ecb7c8047e7cab
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/tests/headers/posix/stdatomic_h.c b/tests/headers/posix/stdatomic_h.c
index 9f46e6a..270faae 100644
--- a/tests/headers/posix/stdatomic_h.c
+++ b/tests/headers/posix/stdatomic_h.c
@@ -66,6 +66,9 @@
   MACRO(ATOMIC_POINTER_LOCK_FREE);
 
   atomic_flag f = ATOMIC_FLAG_INIT;
+
+  // ATOMIC_VAR_INIT() has been removed from C23,
+  // but not from POSIX 2024.
   atomic_int i = ATOMIC_VAR_INIT(123);
 
   i = kill_dependency(i);