Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt...

[mv-sheeva.git] / arch / arm / mm / mmu.c

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 761ffede6a23a9027bd6d805a7fdb8d5e674c7ec..241c24a1c18f391b6795612786ef6139213b7cbf 100644 (file)
--- 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())