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author | Jason Gunthorpe <jgg@mellanox.com> | 2020-03-27 17:00:21 -0300 |
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committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-03-30 16:58:36 -0300 |
commit | bd5d3587b218d33d70a835582dfe1d8f8498e702 (patch) | |
tree | db5411fb8e0b0d82ef248753372d8d42d201fdbc /tools | |
parent | 53bfe17ff88faaadf024956e7cb2b295fae7744b (diff) |
mm/hmm: return error for non-vma snapshots
The pagewalker does not call most ops with NULL vma, those are all routed
to hmm_vma_walk_hole() via ops->pte_hole instead.
Thus hmm_vma_fault() is only called with a NULL vma from
hmm_vma_walk_hole(), so hoist the NULL vma check to there.
Now it is clear that snapshotting with no vma is a HMM_PFN_ERROR as
without a vma we have no path to call hmm_vma_fault().
Link: https://lore.kernel.org/r/20200327200021.29372-10-jgg@ziepe.ca
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions