1 files changed, 31 insertions, 24 deletions

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 761ffede6a2..241c24a1c18 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -100,18 +100,17 @@ static struct cachepolicy cache_policies[] __initdata = {
  * writebuffer to be turned off.  (Note: the write
  * buffer should not be on and the cache off).
  */
-static void __init early_cachepolicy(char **p)
+static int __init early_cachepolicy(char *p)
 {
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(cache_policies); i++) {
 		int len = strlen(cache_policies[i].policy);
 
-		if (memcmp(*p, cache_policies[i].policy, len) == 0) {
+		if (memcmp(p, cache_policies[i].policy, len) == 0) {
 			cachepolicy = i;
 			cr_alignment &= ~cache_policies[i].cr_mask;
 			cr_no_alignment &= ~cache_policies[i].cr_mask;
-			*p += len;
 			break;
 		}
 	}
@@ -130,36 +129,37 @@ static void __init early_cachepolicy(char **p)
 	}
 	flush_cache_all();
 	set_cr(cr_alignment);
+	return 0;
 }
-__early_param("cachepolicy=", early_cachepolicy);
+early_param("cachepolicy", early_cachepolicy);
 
-static void __init early_nocache(char **__unused)
+static int __init early_nocache(char *__unused)
 {
 	char *p = "buffered";
 	printk(KERN_WARNING "nocache is deprecated; use cachepolicy=%s\n", p);
-	early_cachepolicy(&p);
+	early_cachepolicy(p);
+	return 0;
 }
-__early_param("nocache", early_nocache);
+early_param("nocache", early_nocache);
 
-static void __init early_nowrite(char **__unused)
+static int __init early_nowrite(char *__unused)
 {
 	char *p = "uncached";
 	printk(KERN_WARNING "nowb is deprecated; use cachepolicy=%s\n", p);
-	early_cachepolicy(&p);
+	early_cachepolicy(p);
+	return 0;
 }
-__early_param("nowb", early_nowrite);
+early_param("nowb", early_nowrite);
 
-static void __init early_ecc(char **p)
+static int __init early_ecc(char *p)
 {
-	if (memcmp(*p, "on", 2) == 0) {
+	if (memcmp(p, "on", 2) == 0)
 		ecc_mask = PMD_PROTECTION;
-		*p += 2;
-	} else if (memcmp(*p, "off", 3) == 0) {
+	else if (memcmp(p, "off", 3) == 0)
 		ecc_mask = 0;
-		*p += 3;
-	}
+	return 0;
 }
-__early_param("ecc=", early_ecc);
+early_param("ecc", early_ecc);
 
 static int __init noalign_setup(char *__unused)
 {
@@ -420,6 +420,10 @@ static void __init build_mem_type_table(void)
 		user_pgprot |= L_PTE_SHARED;
 		kern_pgprot |= L_PTE_SHARED;
 		vecs_pgprot |= L_PTE_SHARED;
+		mem_types[MT_DEVICE_WC].prot_sect |= PMD_SECT_S;
+		mem_types[MT_DEVICE_WC].prot_pte |= L_PTE_SHARED;
+		mem_types[MT_DEVICE_CACHED].prot_sect |= PMD_SECT_S;
+		mem_types[MT_DEVICE_CACHED].prot_pte |= L_PTE_SHARED;
 		mem_types[MT_MEMORY].prot_sect |= PMD_SECT_S;
 		mem_types[MT_MEMORY_NONCACHED].prot_sect |= PMD_SECT_S;
 #endif
@@ -670,9 +674,9 @@ static unsigned long __initdata vmalloc_reserve = SZ_128M;
  * bytes. This can be used to increase (or decrease) the vmalloc
  * area - the default is 128m.
  */
-static void __init early_vmalloc(char **arg)
+static int __init early_vmalloc(char *arg)
 {
-	vmalloc_reserve = memparse(*arg, arg);
+	vmalloc_reserve = memparse(arg, NULL);
 
 	if (vmalloc_reserve < SZ_16M) {
 		vmalloc_reserve = SZ_16M;
@@ -687,8 +691,9 @@ static void __init early_vmalloc(char **arg)
 			"vmalloc area is too big, limiting to %luMB\n",
 			vmalloc_reserve >> 20);
 	}
+	return 0;
 }
-__early_param("vmalloc=", early_vmalloc);
+early_param("vmalloc", early_vmalloc);
 
 #define VMALLOC_MIN	(void *)(VMALLOC_END - vmalloc_reserve)
 
@@ -1049,10 +1054,12 @@ void setup_mm_for_reboot(char mode)
 	pgd_t *pgd;
 	int i;
 
-	if (current->mm && current->mm->pgd)
-		pgd = current->mm->pgd;
-	else
-		pgd = init_mm.pgd;
+	/*
+	 * We need to access to user-mode page tables here. For kernel threads
+	 * we don't have any user-mode mappings so we use the context that we
+	 * "borrowed".
+	 */
+	pgd = current->active_mm->pgd;
 
 	base_pmdval = PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT;
 	if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale())