[ARM] mm 1: Combine mem_type domain into prot_* at init time

Rather than combining the domain for a particular memory type with
the protection information each time we want to use it, do so when
we fix up the mem_type array at initialisation time.

Rename struct mem_types to be mem_type - each structure is one
memory type description, not several.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 12 insertions, 4 deletions

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 94fd4bf5cb9e..6178be0242f2 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -176,14 +176,14 @@ void adjust_cr(unsigned long mask, unsigned long set)
 }
 #endif
 
-struct mem_types {
+struct mem_type {
         unsigned int    prot_pte;
         unsigned int    prot_l1;
         unsigned int    prot_sect;
         unsigned int    domain;
 };
 
-static struct mem_types mem_types[] __initdata = {
+static struct mem_type mem_types[] __initdata = {
         [MT_DEVICE] = {
                 .prot_pte  = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
                                 L_PTE_WRITE,
@@ -368,6 +368,14 @@ static void __init build_mem_type_table(void)
         }
         printk("Memory policy: ECC %sabled, Data cache %s\n",
                 ecc_mask ? "en" : "dis", cp->policy);
+
+        for (i = 0; i < ARRAY_SIZE(mem_types); i++) {
+                struct mem_type *t = &mem_types[i];
+                if (t->prot_l1)
+                        t->prot_l1 |= PMD_DOMAIN(t->domain);
+                if (t->prot_sect)
+                        t->prot_sect |= PMD_DOMAIN(t->domain);
+        }
 }
 
 #define vectors_base()  (vectors_high() ? 0xffff0000 : 0)
@@ -458,8 +466,8 @@ void __init create_mapping(struct map_desc *md)
 
         domain    = mem_types[md->type].domain;
         prot_pte  = __pgprot(mem_types[md->type].prot_pte);
-        prot_l1   = mem_types[md->type].prot_l1 | PMD_DOMAIN(domain);
-        prot_sect = mem_types[md->type].prot_sect | PMD_DOMAIN(domain);
+        prot_l1   = mem_types[md->type].prot_l1;
+        prot_sect = mem_types[md->type].prot_sect;
 
         /*
          * Catch 36-bit addresses