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xen/grant-table: Support mappings required by blkback

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Add support for mappings without GNTMAP_contains_pte. This was not
supported because the unmap operation assumed that this flag was being
used; adding a parameter to the unmap operation to allow the PTE
clearing to be disabled is sufficient to make unmap capable of
supporting either mapping type.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
[v1: Fix cleanpatch warnings]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Daniel De Graaf
2011-12-14 15:12:11 -05:00
committed by Konrad Rzeszutek Wilk
parent 2946a52ac7
commit 7d17e84bb8
3 changed files with 8 additions and 21 deletions
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3
drivers/xen/gntdev.c
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@@ -314,7 +314,8 @@ static int __unmap_grant_pages(struct grant_map *map, int offset, int pages)
}
}
err = gnttab_unmap_refs(map->unmap_ops + offset, map->pages + offset, pages);
err = gnttab_unmap_refs(map->unmap_ops + offset, map->pages + offset,
pages, true);
if (err)
return err;