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mm/hmm: Do not use list*_rcu() for hmm->ranges 

This list is always read and written while holding hmm->lock so there is
no need for the confusing _rcu annotations.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed-by: Ira Weiny <iweiny@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Philip Yang <Philip.Yang@amd.com>
alistair/sunxi64-5.4-dsi
Jason Gunthorpe 2019-05-23 11:43:43 -03:00
parent 378a604064
commit 157816f377
1 changed files with 2 additions and 2 deletions
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4
mm/hmm.c
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@ -912,7 +912,7 @@ int hmm_range_register(struct hmm_range *range,
range->hmm = hmm;
kref_get(&hmm->kref);
list_add_rcu(&range->list, &hmm->ranges);
list_add(&range->list, &hmm->ranges);
/*
* If there are any concurrent notifiers we have to wait for them for
@ -942,7 +942,7 @@ void hmm_range_unregister(struct hmm_range *range)
return;
mutex_lock(&hmm->lock);
list_del_rcu(&range->list);
list_del(&range->list);
mutex_unlock(&hmm->lock);
/* Drop reference taken by hmm_range_register() */