target/linux/brcm47xx/patches-2.6.23/310-no_highpage.patch

   1 Index: linux-2.6.23/arch/mips/mm/init.c
   2 ===================================================================
   3 --- linux-2.6.23.orig/arch/mips/mm/init.c       2007-10-13 11:46:58.762489429 +0200
   4 +++ linux-2.6.23/arch/mips/mm/init.c    2007-10-13 11:47:36.092616749 +0200
   5 @@ -205,31 +205,6 @@
   6         preempt_check_resched();
   7  }
   8
   9 -void copy_user_highpage(struct page *to, struct page *from,
  10 -       unsigned long vaddr, struct vm_area_struct *vma)
  11 -{
  12 -       void *vfrom, *vto;
  13 -
  14 -       vto = kmap_atomic(to, KM_USER1);
  15 -       if (cpu_has_dc_aliases && cpu_use_kmap_coherent && !Page_dcache_dirty(from)) {
  16 -               vfrom = kmap_coherent(from, vaddr);
  17 -               copy_page(vto, vfrom);
  18 -               kunmap_coherent();
  19 -       } else {
  20 -               vfrom = kmap_atomic(from, KM_USER0);
  21 -               copy_page(vto, vfrom);
  22 -               kunmap_atomic(vfrom, KM_USER0);
  23 -       }
  24 -       if (((vma->vm_flags & VM_EXEC) && !cpu_has_ic_fills_f_dc) ||
  25 -           pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
  26 -               flush_data_cache_page((unsigned long)vto);
  27 -       kunmap_atomic(vto, KM_USER1);
  28 -       /* Make sure this page is cleared on other CPU's too before using it */
  29 -       smp_wmb();
  30 -}
  31 -
  32 -EXPORT_SYMBOL(copy_user_highpage);
  33 -
  34  void copy_to_user_page(struct vm_area_struct *vma,
  35         struct page *page, unsigned long vaddr, void *dst, const void *src,
  36         unsigned long len)
  37 Index: linux-2.6.23/include/asm-mips/page.h
  38 ===================================================================
  39 --- linux-2.6.23.orig/include/asm-mips/page.h   2007-10-13 11:45:50.518600430 +0200
  40 +++ linux-2.6.23/include/asm-mips/page.h        2007-10-13 11:47:26.472068504 +0200
  41 @@ -35,6 +35,7 @@
  42  #ifndef __ASSEMBLY__
  43
  44  #include <linux/pfn.h>
  45 +#include <asm/cpu-features.h>
  46  #include <asm/io.h>
  47
  48  /*
  49 @@ -67,13 +68,16 @@
  50                 flush_data_cache_page((unsigned long)addr);
  51  }
  52
  53 -extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
  54 -       struct page *to);
  55 -struct vm_area_struct;
  56 -extern void copy_user_highpage(struct page *to, struct page *from,
  57 -       unsigned long vaddr, struct vm_area_struct *vma);
  58 +static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
  59 +       struct page *to)
  60 +{
  61 +       extern void (*flush_data_cache_page)(unsigned long addr);
  62
  63 -#define __HAVE_ARCH_COPY_USER_HIGHPAGE
  64 +       copy_page(vto, vfrom);
  65 +       if (!cpu_has_ic_fills_f_dc ||
  66 +           pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
  67 +               flush_data_cache_page((unsigned long)vto);
  68 +}
  69
  70  /*
  71   * These are used to make use of C type-checking..