git: 56ee5c551f89 - main - sysctl: make sys/sysctl.h self contained

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=56ee5c551f89e767e931c55e063a20abd0c55346

commit 56ee5c551f89e767e931c55e063a20abd0c55346
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2021-10-11 17:14:51 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2021-10-11 17:20:07 +0000

    sysctl: make sys/sysctl.h self contained
    
    sys/sysctl.h only needs u_int and size_t from sys/types.h. When the
    sysctl interface was designed, having one more more prerequisites
    (especially sys/types.h) was the norm. Times have changed, and to make
    things more portable, make sys/types.h optional. We do this by including
    sys/_types.h, defining size_t if needed, and changing u_int to 'unsigned
    int' in a prototype for userland builds. For kernel builds, sys/types.h
    is still required.
    
    Sponsored by:           Netflix
    Reviewed by:            kib, jhb
    Differential Revision:  https://reviews.freebsd.org/D31827
---
 sys/sys/sysctl.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sys/sys/sysctl.h b/sys/sys/sysctl.h
index 9e9bd723f4bd..8178c7208f9b 100644
--- a/sys/sys/sysctl.h
+++ b/sys/sys/sysctl.h
@@ -1180,9 +1180,14 @@ struct sbuf *sbuf_new_for_sysctl(struct sbuf *, char *, int,
 	    struct sysctl_req *);
 #else	/* !_KERNEL */
 #include <sys/cdefs.h>
+#include <sys/_types.h>
+#ifndef _SIZE_T_DECLARED
+typedef	__size_t	size_t;
+#define	_SIZE_T_DECLARED
+#endif
 
 __BEGIN_DECLS
-int	sysctl(const int *, u_int, void *, size_t *, const void *, size_t);
+int	sysctl(const int *, unsigned int, void *, size_t *, const void *, size_t);
 int	sysctlbyname(const char *, void *, size_t *, const void *, size_t);
 int	sysctlnametomib(const char *, int *, size_t *);
 __END_DECLS