#endif
#define FIRST_USER_ADDRESS 0UL
-#define VMALLOC_START MAP_BASE
+/*
+ * TLB refill handlers also map the vmalloc area into xuseg. Avoid
+ * the first couple of pages so NULL pointer dereferences will still
+ * reliably trap.
+ */
+#define VMALLOC_START (MAP_BASE + (2 * PAGE_SIZE))
#define VMALLOC_END \
- (VMALLOC_START + \
+ (MAP_BASE + \
min(PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, \
(1UL << cpu_vmbits)) - (1UL << 32))