[PATCH] uml: locking comments in iomem driver

[safe/jmp/linux-2.6] / arch / um / kernel / mem.c

diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 64fa062..fb11992 100644 (file)
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
  * Licensed under the GPL
  */
@@ -19,14 +19,16 @@
 #include "mem_user.h"
 #include "uml_uaccess.h"
 #include "os.h"
-
-extern char __binary_start;
+#include "linux/types.h"
+#include "linux/string.h"
+#include "init.h"
+#include "kern_constants.h"
 
 /* Changed during early boot */
 unsigned long *empty_zero_page = NULL;
 unsigned long *empty_bad_page = NULL;
 pgd_t swapper_pg_dir[PTRS_PER_PGD];
-unsigned long highmem;
+unsigned long long highmem;
 int kmalloc_ok = 0;
 
 static unsigned long brk_end;
@@ -53,7 +55,7 @@ static void setup_highmem(unsigned long highmem_start,
        for(i = 0; i < highmem_len >> PAGE_SHIFT; i++){
                page = &mem_map[highmem_pfn + i];
                ClearPageReserved(page);
-               set_page_count(page, 1);
+               init_page_count(page);
                __free_page(page);
        }
 }
@@ -61,8 +63,6 @@ static void setup_highmem(unsigned long highmem_start,
 
 void mem_init(void)
 {
-       unsigned long start;
-
        max_low_pfn = (high_physmem - uml_physmem) >> PAGE_SHIFT;
 
         /* clear the zero-page */
@@ -77,17 +77,12 @@ void mem_init(void)
        free_bootmem(__pa(brk_end), uml_reserved - brk_end);
        uml_reserved = brk_end;
 
-       /* Fill in any hole at the start of the binary */
-       start = (unsigned long) &__binary_start & PAGE_MASK;
-       if(uml_physmem != start){
-               map_memory(uml_physmem, __pa(uml_physmem), start - uml_physmem,
-                          1, 1, 0);
-       }
-
        /* this will put all low memory onto the freelists */
        totalram_pages = free_all_bootmem();
+#ifdef CONFIG_HIGHMEM
        totalhigh_pages = highmem >> PAGE_SHIFT;
        totalram_pages += totalhigh_pages;
+#endif
        num_physpages = totalram_pages;
        max_pfn = totalram_pages;
        printk(KERN_INFO "Memory: %luk available\n", 
@@ -228,10 +223,14 @@ void paging_init(void)
 
        empty_zero_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE);
        empty_bad_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE);
-       for(i=0;i<sizeof(zones_size)/sizeof(zones_size[0]);i++) 
+       for(i = 0; i < ARRAY_SIZE(zones_size); i++)
                zones_size[i] = 0;
-       zones_size[0] = (end_iomem >> PAGE_SHIFT) - (uml_physmem >> PAGE_SHIFT);
-       zones_size[2] = highmem >> PAGE_SHIFT;
+
+       zones_size[ZONE_NORMAL] = (end_iomem >> PAGE_SHIFT) -
+               (uml_physmem >> PAGE_SHIFT);
+#ifdef CONFIG_HIGHMEM
+       zones_size[ZONE_HIGHMEM] = highmem >> PAGE_SHIFT;
+#endif
        free_area_init(zones_size);
 
        /*
@@ -248,7 +247,7 @@ void paging_init(void)
 #endif
 }
 
-struct page *arch_validate(struct page *page, int mask, int order)
+struct page *arch_validate(struct page *page, gfp_t mask, int order)
 {
        unsigned long addr, zero = 0;
        int i;
@@ -292,7 +291,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
                        (end - start) >> 10);
        for (; start < end; start += PAGE_SIZE) {
                ClearPageReserved(virt_to_page(start));
-               set_page_count(virt_to_page(start), 1);
+               init_page_count(virt_to_page(start));
                free_page(start);
                totalram_pages++;
        }