git: 127109e75d06 - stable/15 - libc: Add missing kill_dependency macro

From: Faraz Vahedi <kfv_at_FreeBSD.org>
Date: Sat, 31 Oct 2026 10:06:30 UTC 
The branch stable/15 has been updated by kfv:

URL: https://cgit.FreeBSD.org/src/commit/?id=127109e75d06b14bce30849e9131318b592ea808

commit 127109e75d06b14bce30849e9131318b592ea808
Author:     Faraz Vahedi <kfv@FreeBSD.org>
AuthorDate: 2026-05-01 15:41:49 +0000
Commit:     Faraz Vahedi <kfv@FreeBSD.org>
CommitDate: 2026-10-31 10:03:30 +0000

    libc: Add missing kill_dependency macro
    
    Add `kill_dependency` as specified by C11 ยง7.17.3.1.
    
    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
    (cherry picked from commit 9d87c1aac4a84ac5e82acf872f645a7202977204)
---
 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.
  */