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vfs: retire VNODE_REFCOUNT_FENCE_* macros

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They are unused as of last year.
This commit is contained in:
Mateusz Guzik 2021-09-18 10:14:35 +02:00
parent 007c2463d6
commit 5d8e32a66c
1 changed files with 0 additions and 16 deletions
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16
sys/kern/vfs_subr.c
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@ -121,22 +121,6 @@ static int v_inval_buf_range_locked(struct vnode *vp, struct bufobj *bo,
daddr_t startlbn, daddr_t endlbn);
static void vnlru_recalc(void);
/*
* These fences are intended for cases where some synchronization is
* needed between access of v_iflags and lockless vnode refcount (v_holdcnt
* and v_usecount) updates. Access to v_iflags is generally synchronized
* by the interlock, but we have some internal assertions that check vnode
* flags without acquiring the lock. Thus, these fences are INVARIANTS-only
* for now.
*/
#ifdef INVARIANTS
#define VNODE_REFCOUNT_FENCE_ACQ() atomic_thread_fence_acq()
#define VNODE_REFCOUNT_FENCE_REL() atomic_thread_fence_rel()
#else
#define VNODE_REFCOUNT_FENCE_ACQ()
#define VNODE_REFCOUNT_FENCE_REL()
#endif
/*
* Number of vnodes in existence. Increased whenever getnewvnode()
* allocates a new vnode, decreased in vdropl() for VIRF_DOOMED vnode.