FreeBSD: Remove references to DEBUG_VFS_LOCKS

This option is removed upstream in favour of plain INVARIANTS.

VNASSERT is always defined so I see no reason to use it conditionally.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Signed-off-by: Mark Johnston <markj@FreeBSD.org>
Closes openzfs#18136

Author: markjdb

module/Makefile.bsd

@@ -62,11 +62,6 @@ CFLAGS+= -DZFS_DEBUG -g
 CFLAGS += -DNDEBUG
 .endif
 
-.if defined(WITH_VFS_DEBUG) && ${WITH_VFS_DEBUG} == "true"
-# kernel must also be built with this option for this to work
-CFLAGS+= -DDEBUG_VFS_LOCKS
-.endif
-
 .if defined(WITH_GCOV) && ${WITH_GCOV} == "true"
 CFLAGS+=	 -fprofile-arcs -ftest-coverage
 .endif

module/os/freebsd/zfs/zfs_vnops_os.c

@@ -100,14 +100,6 @@
 
 VFS_SMR_DECLARE;
 
-#ifdef DEBUG_VFS_LOCKS
-#define	VNCHECKREF(vp)				  \
-	VNASSERT((vp)->v_holdcnt > 0 && (vp)->v_usecount > 0, vp,	\
-	    ("%s: wrong ref counts", __func__));
-#else
-#define	VNCHECKREF(vp)
-#endif
-
 #if __FreeBSD_version >= 1400045
 typedef uint64_t cookie_t;
 #else
@@ -965,9 +957,6 @@ zfs_create(znode_t *dzp, const char *name, vattr_t *vap, int excl, int mode,
 	zfs_acl_ids_t   acl_ids;
 	boolean_t	fuid_dirtied;
 	uint64_t	txtype;
-#ifdef DEBUG_VFS_LOCKS
-	vnode_t	*dvp = ZTOV(dzp);
-#endif
 
 	if (is_nametoolong(zfsvfs, name))
 		return (SET_ERROR(ENAMETOOLONG));
@@ -1097,7 +1086,8 @@ zfs_create(znode_t *dzp, const char *name, vattr_t *vap, int excl, int mode,
 	getnewvnode_drop_reserve();
 
 out:
-	VNCHECKREF(dvp);
+	VNASSERT(ZTOV(dzp)->v_holdcnt > 0 && ZTOV(dzp)->v_usecount > 0,
+	    ZTOV(dzp), ("%s: wrong ref counts", __func__));
 	if (error == 0) {
 		*zpp = zp;
 	}