From 63cc3320d9b3093ce0ee9eccb8742eb2ed90f164 Mon Sep 17 00:00:00 2001
From: Dmitry Chagin <dchagin@FreeBSD.org>
Date: Sun, 24 May 2015 18:11:22 +0000
Subject: [PATCH] Hide vfs.pfs.trace variable if it is not used.

---
 sys/fs/pseudofs/pseudofs.c    | 2 ++
 sys/modules/pseudofs/Makefile | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/sys/fs/pseudofs/pseudofs.c b/sys/fs/pseudofs/pseudofs.c
index d7894af61a99..1824d0b005e2 100644
--- a/sys/fs/pseudofs/pseudofs.c
+++ b/sys/fs/pseudofs/pseudofs.c
@@ -52,9 +52,11 @@ static MALLOC_DEFINE(M_PFSNODES, "pfs_nodes", "pseudofs nodes");
 SYSCTL_NODE(_vfs, OID_AUTO, pfs, CTLFLAG_RW, 0,
     "pseudofs");
 
+#ifdef PSEUDOFS_TRACE
 int pfs_trace;
 SYSCTL_INT(_vfs_pfs, OID_AUTO, trace, CTLFLAG_RW, &pfs_trace, 0,
     "enable tracing of pseudofs vnode operations");
+#endif
 
 #if PFS_FSNAMELEN != MFSNAMELEN
 #error "PFS_FSNAMELEN is not equal to MFSNAMELEN"
diff --git a/sys/modules/pseudofs/Makefile b/sys/modules/pseudofs/Makefile
index d5696c5c4795..6ddb74929f94 100644
--- a/sys/modules/pseudofs/Makefile
+++ b/sys/modules/pseudofs/Makefile
@@ -23,4 +23,10 @@ EXPORT_SYMS=	pfs_mount	\
 		pfs_enable	\
 		pfs_destroy
 
+.if !defined(KERNBUILDDIR)
+.if defined(PSEUDOFS_TRACE)
+CFLAGS+=-DPSEUDOFS_TRACE
+.endif
+.endif
+
 .include <bsd.kmod.mk>