linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / arch / um / kernel / physmem.c

diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 5c1a77f..544665e 100644 (file)
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -225,7 +225,7 @@ EXPORT_SYMBOL(physmem_forget_descriptor);
 EXPORT_SYMBOL(physmem_remove_mapping);
 EXPORT_SYMBOL(physmem_subst_mapping);
 
-int arch_free_page(struct page *page, int order)
+void arch_free_page(struct page *page, int order)
 {
        void *virt;
        int i;
@@ -234,8 +234,6 @@ int arch_free_page(struct page *page, int order)
                virt = __va(page_to_phys(page + i));
                physmem_remove_mapping(virt);
        }
-
-       return 0;
 }
 
 int is_remapped(void *virt)
@@ -248,17 +246,7 @@ int is_remapped(void *virt)
 /* Changed during early boot */
 unsigned long high_physmem;
 
-extern unsigned long physmem_size;
-
-void *to_virt(unsigned long phys)
-{
-       return((void *) uml_physmem + phys);
-}
-
-unsigned long to_phys(void *virt)
-{
-       return(((unsigned long) virt) - uml_physmem);
-}
+extern unsigned long long physmem_size;
 
 int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
 {
@@ -277,7 +265,7 @@ int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
        highmem_len = highmem_pages * sizeof(struct page);
 
        total_pages = phys_pages + iomem_pages + highmem_pages;
-       total_len = phys_len + iomem_pages + highmem_len;
+       total_len = phys_len + iomem_len + highmem_len;
 
        if(kmalloc_ok){
                map = kmalloc(total_len, GFP_KERNEL);
@@ -300,31 +288,6 @@ int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
        return(0);
 }
 
-struct page *phys_to_page(const unsigned long phys)
-{
-       return(&mem_map[phys >> PAGE_SHIFT]);
-}
-
-struct page *__virt_to_page(const unsigned long virt)
-{
-       return(&mem_map[__pa(virt) >> PAGE_SHIFT]);
-}
-
-phys_t page_to_phys(struct page *page)
-{
-       return((page - mem_map) << PAGE_SHIFT);
-}
-
-pte_t mk_pte(struct page *page, pgprot_t pgprot)
-{
-       pte_t pte;
-
-       pte_set_val(pte, page_to_phys(page), pgprot);
-       if(pte_present(pte))
-               pte_mknewprot(pte_mknewpage(pte));
-       return(pte);
-}
-
 /* Changed during early boot */
 static unsigned long kmem_top = 0;
 
@@ -355,8 +318,10 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len,
 
 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
 
+extern int __syscall_stub_start, __binary_start;
+
 void setup_physmem(unsigned long start, unsigned long reserve_end,
-                  unsigned long len, unsigned long highmem)
+                  unsigned long len, unsigned long long highmem)
 {
        unsigned long reserve = reserve_end - start;
        int pfn = PFN_UP(__pa(reserve_end));
@@ -373,6 +338,12 @@ void setup_physmem(unsigned long start, unsigned long reserve_end,
                exit(1);
        }
 
+       /* Special kludge - This page will be mapped in to userspace processes
+        * from physmem_fd, so it needs to be written out there.
+        */
+       os_seek_file(physmem_fd, __pa(&__syscall_stub_start));
+       os_write_file(physmem_fd, &__syscall_stub_start, PAGE_SIZE);
+
        bootmap_size = init_bootmem(pfn, pfn + delta);
        free_bootmem(__pa(reserve_end) + bootmap_size,
                     len - bootmap_size - reserve);