gnttab: drop GNTMAP_can_fail

There's neither documentation of what this flag is supposed to mean, nor
any implementation in the hypervisor.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h
index 018036e825f8f2999812cdb089f7fa2195789231..2e9ebc6c5dab8e88928e8f7995ed523322f96e23 100644 (file)
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -627,9 +627,6 @@ DEFINE_XEN_GUEST_HANDLE(gnttab_cache_flush_t);
 #define _GNTMAP_contains_pte    (4)
 #define GNTMAP_contains_pte     (1<<_GNTMAP_contains_pte)
 
-#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).