commit faa845aab6113190ba8c75a171b2cca8673a6214
Author: Zhenlei Huang <zlei@FreeBSD.org>
Date:   Sun Jan 26 01:59:33 2025 +0800

    kern_sysctl: Fix printing function name in the re-use sysctl leaf warning
    
    The helper function sysctl_warn_reuse() is intended to print the name of
    the caller rather than that of itself.
    
    PR:     221853
    Fixes:  4ae2ade11426 Enhance debugibility of sysctl leaf re-use warnings
    MFC after:      3 days
    Differential Revision:  https://reviews.freebsd.org/D48645

diff --git a/sys/kern/kern_sysctl.c b/sys/kern/kern_sysctl.c
index 9d824fbd3cbd..da09aaed5558 100644
--- a/sys/kern/kern_sysctl.c
+++ b/sys/kern/kern_sysctl.c
@@ -411,7 +411,7 @@ sysctl_warn_reuse(const char *func, struct sysctl_oid *leaf)
 	(void)sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN | SBUF_INCLUDENUL);
 	sbuf_set_drain(&sb, sbuf_printf_drain, NULL);
 
-	sbuf_printf(&sb, "%s: can't re-use a leaf (", __func__);
+	sbuf_printf(&sb, "%s: can't re-use a leaf (", func);
 
 	rc = sysctl_search_oid(nodes, leaf);
 	if (rc > 0) {