git: 9d87c1aac4a8 - main - libc: Add missing kill_dependency macro

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=9d87c1aac4a84ac5e82acf872f645a7202977204

commit 9d87c1aac4a84ac5e82acf872f645a7202977204
Author:     Faraz Vahedi <kfv@kfv.io>
AuthorDate: 2026-05-01 15:41:49 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2026-06-20 00:23:28 +0000

    libc: Add missing kill_dependency macro
    
    Add `kill_dependency` as specified by C11 §7.17.3.1.
    
    The macro is required to break dependency chains in
    expressions without affecting the value.
    
    No functional impact beyond providing the required,
    value-preserving definition.
    
    Signed-off-by: Faraz Vahedi <kfv@kfv.io>
    Reviewed by: imp
    Pull Request: https://github.com/freebsd/freebsd-src/pull/2185
---
 sys/sys/stdatomic.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/sys/stdatomic.h b/sys/sys/stdatomic.h
index 2d565ce991be..e6eb46cd6ef3 100644
--- a/sys/sys/stdatomic.h
+++ b/sys/sys/stdatomic.h
@@ -141,6 +141,8 @@ typedef enum {
 	memory_order_seq_cst = __ATOMIC_SEQ_CST
 } memory_order;
 
+#define	kill_dependency(y)		(y)
+
 /*
  * 7.17.4 Fences.
  */