Author: mjg
Date: Fri Aug 23 21:05:37 2019
New Revision: 351438
URL: https://svnweb.freebsd.org/changeset/base/351438
Log:
vfs: assert the lock held in MNT_REF/MNT_REL
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/sys/mount.h
Modified: head/sys/sys/mount.h
==============================================================================
--- head/sys/sys/mount.h Fri Aug 23 19:53:11 2019 (r351437)
+++ head/sys/sys/mount.h Fri Aug 23 21:05:37 2019 (r351438)
@@ -265,8 +265,12 @@ void __mnt_vnode_markerfree_active(struct vno
#define MNT_ITRYLOCK(mp) mtx_trylock(&(mp)->mnt_mtx)
#define MNT_IUNLOCK(mp) mtx_unlock(&(mp)->mnt_mtx)
#define MNT_MTX(mp) (&(mp)->mnt_mtx)
-#define MNT_REF(mp) (mp)->mnt_ref++
+#define MNT_REF(mp) do {
\
+ mtx_assert(MNT_MTX(mp), MA_OWNED); \
+ (mp)->mnt_ref++; \
+} while (0)
#define MNT_REL(mp) do {
\
+ mtx_assert(MNT_MTX(mp), MA_OWNED); \
KASSERT((mp)->mnt_ref > 0, ("negative mnt_ref")); \
(mp)->mnt_ref--; \
if ((mp)->mnt_ref == 0) \
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