---

yaml
---
r: 77818
b: refs/heads/master
c: 2adb4e1
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d02b08f6e8b184ffef349e395210a5e82ff4f4bc
+refs/heads/master: 2adb4e10092ee1719539bcfe397b96dbdc863e2e

trunk/arch/sh/mm/init.c

@@ -130,6 +130,37 @@ void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
 
 	set_pte_phys(address, phys, prot);
 }
+
+void __init page_table_range_init(unsigned long start, unsigned long end,
+					 pgd_t *pgd_base)
+{
+	pgd_t *pgd;
+	pud_t *pud;
+	pmd_t *pmd;
+	int pgd_idx;
+	unsigned long vaddr;
+
+	vaddr = start & PMD_MASK;
+	end = (end + PMD_SIZE - 1) & PMD_MASK;
+	pgd_idx = pgd_index(vaddr);
+	pgd = pgd_base + pgd_idx;
+
+	for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd++, pgd_idx++) {
+		BUG_ON(pgd_none(*pgd));
+		pud = pud_offset(pgd, 0);
+		BUG_ON(pud_none(*pud));
+		pmd = pmd_offset(pud, 0);
+
+		if (!pmd_present(*pmd)) {
+			pte_t *pte_table;
+			pte_table = (pte_t *)alloc_bootmem_low_pages(PAGE_SIZE);
+			memset(pte_table, 0, PAGE_SIZE);
+			pmd_populate_kernel(&init_mm, pmd, pte_table);
+		}
+
+		vaddr += PMD_SIZE;
+	}
+}
 #endif	/* CONFIG_MMU */
 
 /*
@@ -149,6 +180,11 @@ void __init paging_init(void)
 	 * check for a null value. */
 	set_TTB(swapper_pg_dir);
 
+	/* Populate the relevant portions of swapper_pg_dir so that
+	 * we can use the fixmap entries without calling kmalloc.
+	 * pte's will be filled in by __set_fixmap(). */
+	page_table_range_init(FIXADDR_START, FIXADDR_TOP, swapper_pg_dir);
+
 	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 
 	for_each_online_node(nid) {