git: fc1901abcfa9 - main - <sys/sysctl.h>: Reduce overly broad header pollution.

The branch main has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=fc1901abcfa95bbdf985ee86ce24fa73c30d5076

commit fc1901abcfa95bbdf985ee86ce24fa73c30d5076
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2023-01-19 18:32:45 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2023-01-19 18:32:45 +0000

    <sys/sysctl.h>: Reduce overly broad header pollution.
    
    Commit d3f96f661050e9bd21fe29931992a8b9e67ff189 removed <sys/queue.h>
    and replaced it with the very broad <sys/systm.h>.  However, none of
    the changes to sysctl.h in that commit require anything defined in
    <sys/systm.h>.  On the other hand, <sys/sysctl.h> does still make use
    of queue macros.  Drop the include of <sys/systm.h> and re-add
    <sys/queue.h>.
    
    Reviewed by:    imp, kib, asomers
    Obtained from:  CheriBSD
    Sponsored by:   DARPA
    Differential Revision:  https://reviews.freebsd.org/D37950
---
 sys/sys/sysctl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/sys/sysctl.h b/sys/sys/sysctl.h
index 207ffe4a62e7..79da4772615f 100644
--- a/sys/sys/sysctl.h
+++ b/sys/sys/sysctl.h
@@ -39,8 +39,8 @@
 #define	_SYS_SYSCTL_H_
 
 #ifdef _KERNEL
+#include <sys/queue.h>
 #include <sys/tree.h>
-#include <sys/systm.h>
 #endif
 
 /*