target/linux/brcm47xx/patches-2.6.25/310-no_highpage.patch

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