xen: remove gnttab_query_foreign_access()
Commit 1dbd11ca upstream. Remove gnttab_query_foreign_access(), as it is unused and unsafe to use. All previous use cases assumed a grant would not be in use after gnttab_query_foreign_access() returned 0. This information is useless in best case, as it only refers to a situation in the past, which could have changed already. Signed-off-by:Juergen Gross <jgross@suse.com> Reviewed-by:
Jan Beulich <jbeulich@suse.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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