lustre/kernel_patches/patches/vmalloc_to_page-2.4.19-pre1.patch

   1 Index: linux-2.4.19-pre1/mm/memory.c
   2 ===================================================================
   3 --- linux-2.4.19-pre1.orig/mm/memory.c  2004-01-14 01:11:29.000000000 +0300
   4 +++ linux-2.4.19-pre1/mm/memory.c       2004-01-14 01:54:44.000000000 +0300
   5 @@ -1470,3 +1470,25 @@
   6                         len, write, 0, NULL, NULL);
   7         return ret == len ? 0 : -1;
   8  }
   9 +
  10 +struct page * vmalloc_to_page(void * vmalloc_addr)
  11 +{
  12 +       unsigned long addr = (unsigned long) vmalloc_addr;
  13 +       struct page *page = NULL;
  14 +       pmd_t *pmd;
  15 +       pte_t *ptep, pte;
  16 +       pgd_t *pgd;
  17 +
  18 +       pgd = pgd_offset_k(addr);
  19 +       if (!pgd_none(*pgd)) {
  20 +               pmd = pmd_offset(pgd, addr);
  21 +               if (!pmd_none(*pmd)) {
  22 +                       ptep = pte_offset(pmd, addr);
  23 +                       pte = *ptep;
  24 +                       if (pte_present(pte)) {
  25 +                               page = pte_page(pte);
  26 +                       }
  27 +               }
  28 +       }
  29 +       return page;
  30 +}
  31 Index: linux-2.4.19-pre1/kernel/ksyms.c
  32 ===================================================================
  33 --- linux-2.4.19-pre1.orig/kernel/ksyms.c       2004-01-14 01:22:28.000000000 +0300
  34 +++ linux-2.4.19-pre1/kernel/ksyms.c    2004-01-14 01:51:55.000000000 +0300
  35 @@ -112,6 +112,8 @@
  36  EXPORT_SYMBOL(kfree);
  37  EXPORT_SYMBOL(vfree);
  38  EXPORT_SYMBOL(__vmalloc);
  39 +extern struct page * vmalloc_to_page(void *addr);
  40 +EXPORT_SYMBOL(vmalloc_to_page);
  41  EXPORT_SYMBOL(mem_map);
  42  EXPORT_SYMBOL(remap_page_range);
  43  EXPORT_SYMBOL(max_mapnr);