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

   1 Index: linux-2.6.25.4/arch/mips/mm/init.c
   2 ===================================================================
   3 --- linux-2.6.25.4.orig/arch/mips/mm/init.c
   4 +++ linux-2.6.25.4/arch/mips/mm/init.c
   5 @@ -205,32 +205,6 @@ void kunmap_coherent(void)
   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 &&
  16 -           page_mapped(from) && !Page_dcache_dirty(from)) {
  17 -               vfrom = kmap_coherent(from, vaddr);
  18 -               copy_page(vto, vfrom);
  19 -               kunmap_coherent();
  20 -       } else {
  21 -               vfrom = kmap_atomic(from, KM_USER0);
  22 -               copy_page(vto, vfrom);
  23 -               kunmap_atomic(vfrom, KM_USER0);
  24 -       }
  25 -       if (((vma->vm_flags & VM_EXEC) && !cpu_has_ic_fills_f_dc) ||
  26 -           pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
  27 -               flush_data_cache_page((unsigned long)vto);
  28 -       kunmap_atomic(vto, KM_USER1);
  29 -       /* Make sure this page is cleared on other CPU's too before using it */
  30 -       smp_wmb();
  31 -}
  32 -
  33 -EXPORT_SYMBOL(copy_user_highpage);
  34 -
  35  void copy_to_user_page(struct vm_area_struct *vma,
  36         struct page *page, unsigned long vaddr, void *dst, const void *src,
  37         unsigned long len)
  38 Index: linux-2.6.25.4/include/asm-mips/page.h
  39 ===================================================================
  40 --- linux-2.6.25.4.orig/include/asm-mips/page.h
  41 +++ linux-2.6.25.4/include/asm-mips/page.h
  42 @@ -32,6 +32,7 @@
  43  #ifndef __ASSEMBLY__
  44
  45  #include <linux/pfn.h>
  46 +#include <asm/cpu-features.h>
  47  #include <asm/io.h>
  48
  49  /*
  50 @@ -64,13 +65,16 @@ static inline void clear_user_page(void
  51                 flush_data_cache_page((unsigned long)addr);
  52  }
  53
  54 -extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
  55 -       struct page *to);
  56 -struct vm_area_struct;
  57 -extern void copy_user_highpage(struct page *to, struct page *from,
  58 -       unsigned long vaddr, struct vm_area_struct *vma);
  59 +static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
  60 +       struct page *to)
  61 +{
  62 +       extern void (*flush_data_cache_page)(unsigned long addr);
  63
  64 -#define __HAVE_ARCH_COPY_USER_HIGHPAGE
  65 +       copy_page(vto, vfrom);
  66 +       if (!cpu_has_ic_fills_f_dc ||
  67 +           pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
  68 +               flush_data_cache_page((unsigned long)vto);
  69 +}
  70
  71  /*
  72   * These are used to make use of C type-checking..