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tmpfs: drop acq fence now that vn_load_v_data_smr has consume semantics

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Mateusz Guzik 2021-01-25 21:17:48 +01:00
parent 7af02ef0b2
commit c09f799271
2 changed files with 0 additions and 4 deletions
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3
sys/fs/tmpfs/tmpfs_subr.c
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@ -356,9 +356,6 @@ tmpfs_alloc_node(struct mount *mp, struct tmpfs_mount *tmp, enum vtype type,
* pointer to also get the above content in a stable manner.
* Worst case tn_link_smr flag may be set to true despite being stale,
* while the target buffer is already cleared out.
*
* TODO: Since there is no load consume primitive provided
* right now, the load is performed with an acquire fence.
*/
atomic_store_ptr(&nnode->tn_link_target, symlink);
atomic_store_char((char *)&nnode->tn_link_smr, symlink_smr);

1
sys/fs/tmpfs/tmpfs_vnops.c
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@ -1466,7 +1466,6 @@ tmpfs_fplookup_symlink(struct vop_fplookup_symlink_args *v)
vp = v->a_vp;
node = VP_TO_TMPFS_NODE_SMR(vp);
atomic_thread_fence_acq();
if (__predict_false(node == NULL))
return (EAGAIN);
if (!atomic_load_char(&node->tn_link_smr))