Merge commit '900cfa46191a7d87cf1891924cb90499287fd235'; branches 'timers/nohz',...

[linux-2.6-omap-h63xx.git] / arch / um / kernel / mem.c

diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 3eddc2091d4dcd36c7d06c5f48f7b48fd2d76fed..b0ee64622ff70a91bc3a44d52965b402dfaa81c1 100644 (file)
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -22,22 +22,20 @@
 unsigned long *empty_zero_page = NULL;
 /* allocated in paging_init and unchanged thereafter */
 unsigned long *empty_bad_page = NULL;
+
+/*
+ * Initialized during boot, and readonly for initializing page tables
+ * afterwards
+ */
 pgd_t swapper_pg_dir[PTRS_PER_PGD];
+
+/* Initialized at boot time, and readonly after that */
 unsigned long long highmem;
 int kmalloc_ok = 0;
 
+/* Used during early boot */
 static unsigned long brk_end;
 
-void unmap_physmem(void)
-{
-       os_unmap_memory((void *) brk_end, uml_reserved - brk_end);
-}
-
-static void map_cb(void *unused)
-{
-       map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0);
-}
-
 #ifdef CONFIG_HIGHMEM
 static void setup_highmem(unsigned long highmem_start,
                          unsigned long highmem_len)
@@ -65,8 +63,7 @@ void __init mem_init(void)
         * to be turned on.
         */
        brk_end = (unsigned long) UML_ROUND_UP(sbrk(0));
-       map_cb(NULL);
-       initial_thread_cb(map_cb, NULL);
+       map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0);
        free_bootmem(__pa(brk_end), uml_reserved - brk_end);
        uml_reserved = brk_end;
 
@@ -132,7 +129,7 @@ static void __init fixrange_init(unsigned long start, unsigned long end,
                if (pud_none(*pud))
                        one_md_table_init(pud);
                pmd = pmd_offset(pud, vaddr);
-               for (; (j < PTRS_PER_PMD) && (vaddr != end); pmd++, j++) {
+               for (; (j < PTRS_PER_PMD) && (vaddr < end); pmd++, j++) {
                        one_page_table_init(pmd);
                        vaddr += PMD_SIZE;
                }
@@ -191,22 +188,23 @@ static void __init fixaddr_user_init( void)
        pud_t *pud;
        pmd_t *pmd;
        pte_t *pte;
-       unsigned long paddr, vaddr = FIXADDR_USER_START;
+       phys_t p;
+       unsigned long v, vaddr = FIXADDR_USER_START;
 
-       if (  ! size )
+       if (!size)
                return;
 
        fixrange_init( FIXADDR_USER_START, FIXADDR_USER_END, swapper_pg_dir);
-       paddr = (unsigned long)alloc_bootmem_low_pages( size);
-       memcpy( (void *)paddr, (void *)FIXADDR_USER_START, size);
-       paddr = __pa(paddr);
+       v = (unsigned long) alloc_bootmem_low_pages(size);
+       memcpy((void *) v , (void *) FIXADDR_USER_START, size);
+       p = __pa(v);
        for ( ; size > 0; size -= PAGE_SIZE, vaddr += PAGE_SIZE,
-                     paddr += PAGE_SIZE) {
+                     p += PAGE_SIZE) {
                pgd = swapper_pg_dir + pgd_index(vaddr);
                pud = pud_offset(pgd, vaddr);
                pmd = pmd_offset(pud, vaddr);
                pte = pte_offset_kernel(pmd, vaddr);
-               pte_set_val( (*pte), paddr, PAGE_READONLY);
+               pte_set_val(*pte, p, PAGE_READONLY);
        }
 #endif
 }
@@ -301,7 +299,7 @@ void show_mem(void)
 {
        int pfn, total = 0, reserved = 0;
        int shared = 0, cached = 0;
-       int highmem = 0;
+       int high_mem = 0;
        struct page *page;
 
        printk(KERN_INFO "Mem-info:\n");
@@ -313,7 +311,7 @@ void show_mem(void)
                page = pfn_to_page(pfn);
                total++;
                if (PageHighMem(page))
-                       highmem++;
+                       high_mem++;
                if (PageReserved(page))
                        reserved++;
                else if (PageSwapCache(page))
@@ -322,7 +320,7 @@ void show_mem(void)
                        shared += page_count(page) - 1;
        }
        printk(KERN_INFO "%d pages of RAM\n", total);
-       printk(KERN_INFO "%d pages of HIGHMEM\n", highmem);
+       printk(KERN_INFO "%d pages of HIGHMEM\n", high_mem);
        printk(KERN_INFO "%d reserved pages\n", reserved);
        printk(KERN_INFO "%d pages shared\n", shared);
        printk(KERN_INFO "%d pages swap cached\n", cached);
@@ -356,11 +354,13 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
        return pte;
 }
 
-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
        struct page *pte;
 
        pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+       if (pte)
+               pgtable_page_ctor(pte);
        return pte;
 }
 
@@ -375,3 +375,8 @@ pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
        return pmd;
 }
 #endif
+
+void *uml_kmalloc(int size, int flags)
+{
+       return kmalloc(size, flags);
+}