xen/grant-table: Drop unused cmpxchg function

diff --git a/sys/dev/xen/grant_table/grant_table.c b/sys/dev/xen/grant_table/grant_table.c
index 18dabacc9f436b9c9f9ccd8aadb64cb0be04ba60..87e5676c544f4ee7686038fe0943ee9b15d16eaf 100644 (file)
--- a/sys/dev/xen/grant_table/grant_table.c
+++ b/sys/dev/xen/grant_table/grant_table.c
@@ -39,8 +39,6 @@ __FBSDID("$FreeBSD$");
 #include <vm/vm_extern.h>
 #include <vm/pmap.h>
 
-#define cmpxchg(a, b, c) atomic_cmpset_int((volatile u_int *)(a),(b),(c))
-
 /* External tools reserve first few grant table entries. */
 #define NR_RESERVED_ENTRIES 8
 #define GREFS_PER_GRANT_FRAME (PAGE_SIZE / sizeof(grant_entry_t))