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charset="utf-8" There's neither documentation of what this flag is supposed to mean, nor any implementation in the hypervisor. Signed-off-by: Jan Beulich --- a/include/xen/grant_table.h +++ b/include/xen/grant_table.h @@ -196,9 +196,6 @@ typedef union { #define _GNTMAP_contains_pte 4 #define GNTMAP_contains_pte (1 << _GNTMAP_contains_pte) =20 -#define _GNTMAP_can_fail 5 -#define GNTMAP_can_fail (1 << _GNTMAP_can_fail) - /* * Bits to be placed in guest kernel available PTE bits (architecture * dependent; only supported when XENFEAT_gnttab_map_avail_bits is set).