diff --git a/include/linux/mm.h b/include/linux/mm.h
index 0a063b4..046077b 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1924,6 +1924,9 @@
 extern long si_mem_available(void);
 extern void si_meminfo(struct sysinfo * val);
 extern void si_meminfo_node(struct sysinfo *val, int nid);
+#ifdef __HAVE_ARCH_RESERVED_KERNEL_PAGES
+extern unsigned long arch_reserved_kernel_pages(void);
+#endif
 
 extern __printf(3, 4)
 void warn_alloc_failed(gfp_t gfp_mask, unsigned int order,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f6a5a22..e00f545 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6940,6 +6940,17 @@
 __setup("hashdist=", set_hashdist);
 #endif
 
+#ifndef __HAVE_ARCH_RESERVED_KERNEL_PAGES
+/*
+ * Returns the number of pages that arch has reserved but
+ * is not known to alloc_large_system_hash().
+ */
+static unsigned long __init arch_reserved_kernel_pages(void)
+{
+	return 0;
+}
+#endif
+
 /*
  * allocate a large system hash table from bootmem
  * - it is assumed that the hash table must contain an exact power-of-2
@@ -6964,6 +6975,7 @@
 	if (!numentries) {
 		/* round applicable memory size up to nearest megabyte */
 		numentries = nr_kernel_pages;
+		numentries -= arch_reserved_kernel_pages();
 
 		/* It isn't necessary when PAGE_SIZE >= 1MB */
 		if (PAGE_SHIFT < 20)