git: a6e1727fb8ac - stable/15 - sys/sysctl.h: Make it self-contained when included from the kernel

The branch stable/15 has been updated by olce:

URL: https://cgit.FreeBSD.org/src/commit/?id=a6e1727fb8ac3d9b1b7a5862bb7d7965674da69f

commit a6e1727fb8ac3d9b1b7a5862bb7d7965674da69f
Author:     Olivier Certner <olce@FreeBSD.org>
AuthorDate: 2026-02-06 15:02:39 +0000
Commit:     Olivier Certner <olce@FreeBSD.org>
CommitDate: 2026-03-05 14:43:23 +0000

    sys/sysctl.h: Make it self-contained when included from the kernel
    
    MFC after:      2 weeks
    Sponsored by:   The FreeBSD Foundation
    
    (cherry picked from commit 1a446f765d9cb34e8137ffa6dbb71ce551560cc1)
---
 sys/sys/sysctl.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/sys/sysctl.h b/sys/sys/sysctl.h
index 902f5bde9c37..139b4bc5d9da 100644
--- a/sys/sys/sysctl.h
+++ b/sys/sys/sysctl.h
@@ -36,7 +36,8 @@
 #define	_SYS_SYSCTL_H_
 
 #ifdef _KERNEL
-#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <sys/_null.h>
 #include <sys/queue.h>
 #include <sys/tree.h>
 #endif