Hi David,

On 20/08/15 10:51, David Vrabel wrote:

On 07/08/15 17:46, Julien Grall wrote:

quoted

Currently, a grant is always based on the Xen page granularity (i.e
4KB). When Linux is using a different page granularity, a single page
will be split between multiple grants.

The new helpers will be in charge to split the Linux page into grants and
call a function given by the caller on each grant.

Also provide an helper to count the number of grants within a given
contiguous region.

Note that the x86/include/asm/xen/page.h is now including
xen/interface/grant_table.h rather than xen/grant_table.h. It's
necessary because xen/grant_table.h depends on asm/xen/page.h and will
break the compilation. Furthermore, only definition in
interface/grant_table.h was required.

Reviewed-by: David Vrabel <redacted>
But...

quoted

+/* Helper to get to call fn only on the first "grant chunk" */
+static inline void gnttab_one_grant(struct page *page, unsigned int offset,
+				    unsigned len, xen_grant_fn_t fn,
+				    void *data)

...call this gnttab_for_one_grant().

Will rename it on the next version.

Regards,

-- 
Julien Grall