---

yaml
---
r: 138739
b: refs/heads/master
c: 698609b
h: refs/heads/master
i:
  138737: 076febf
  138735: b425fe7
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5c0e6f035df983210e4d22213aed624ced502d3d
+refs/heads/master: 698609bdcd35d0641f4c6622c83680ab1a6d67cb

trunk/arch/x86/mm/ioremap.c

@@ -487,7 +487,12 @@ static int __init early_ioremap_debug_setup(char *str)
 early_param("early_ioremap_debug", early_ioremap_debug_setup);
 
 static __initdata int after_paging_init;
-static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)] __page_aligned_bss;
+#define __FIXADDR_TOP (-PAGE_SIZE)
+static pte_t bm_pte[(__fix_to_virt(FIX_DBGP_BASE)
+		     ^ __fix_to_virt(FIX_BTMAP_BEGIN)) >> PMD_SHIFT
+		    ? PAGE_SIZE / sizeof(pte_t) : 0] __page_aligned_bss;
+#undef __FIXADDR_TOP
+static __initdata pte_t *bm_ptep;
 
 static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
 {
@@ -502,6 +507,8 @@ static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
 
 static inline pte_t * __init early_ioremap_pte(unsigned long addr)
 {
+	if (!sizeof(bm_pte))
+		return &bm_ptep[pte_index(addr)];
 	return &bm_pte[pte_index(addr)];
 }
 
@@ -519,8 +526,14 @@ void __init early_ioremap_init(void)
 		slot_virt[i] = fix_to_virt(FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*i);
 
 	pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN));
-	memset(bm_pte, 0, sizeof(bm_pte));
-	pmd_populate_kernel(&init_mm, pmd, bm_pte);
+	if (sizeof(bm_pte)) {
+		memset(bm_pte, 0, sizeof(bm_pte));
+		pmd_populate_kernel(&init_mm, pmd, bm_pte);
+	} else {
+		bm_ptep = pte_offset_kernel(pmd, 0);
+		if (early_ioremap_debug)
+			printk(KERN_INFO "bm_ptep=%p\n", bm_ptep);
+	}
 
 	/*
 	 * The boot-ioremap range spans multiple pmds, for which