diff options
Diffstat (limited to 'sys/fs/nullfs/null_subr.c')
| -rw-r--r-- | sys/fs/nullfs/null_subr.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/fs/nullfs/null_subr.c b/sys/fs/nullfs/null_subr.c index 66144c0..496be3c 100644 --- a/sys/fs/nullfs/null_subr.c +++ b/sys/fs/nullfs/null_subr.c @@ -298,6 +298,7 @@ null_checkvp(vp, fil, lno) char *fil; int lno; { + int interlock = 0; struct null_node *a = VTONULL(vp); #ifdef notyet /* @@ -321,6 +322,10 @@ null_checkvp(vp, fil, lno) while (null_checkvp_barrier) /*WAIT*/ ; panic("null_checkvp"); } + if (mtx_owned(VI_MTX(vp)) != 0) { + VI_UNLOCK(vp); + interlock = 1; + } if (vrefcnt(a->null_lowervp) < 1) { int i; u_long *p; printf("vp = %p, unref'ed lowervp\n", (void *)vp); @@ -331,6 +336,8 @@ null_checkvp(vp, fil, lno) while (null_checkvp_barrier) /*WAIT*/ ; panic ("null with unref'ed lowervp"); }; + if (interlock != 0) + VI_LOCK(vp); #ifdef notyet printf("null %x/%d -> %x/%d [%s, %d]\n", NULLTOV(a), vrefcnt(NULLTOV(a)), |
