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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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include/xen/grant_table.h
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@ -185,6 +185,6 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
struct gnttab_map_grant_ref *kmap_ops,
struct page **pages, unsigned int count);
int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
struct page **pages, unsigned int count);
struct page **pages, unsigned int count, bool clear_pte);
#endif /* __ASM_GNTTAB_H__ */