target/linux/brcm47xx/patches-3.3/310-no_highpage.patch

   1 --- a/arch/mips/include/asm/page.h
   2 +++ b/arch/mips/include/asm/page.h
   3 @@ -48,6 +48,7 @@
   4  #ifndef __ASSEMBLY__
   5
   6  #include <linux/pfn.h>
   7 +#include <asm/cpu-features.h>
   8  #include <asm/io.h>
   9
  10  extern void build_clear_page(void);
  11 @@ -83,13 +84,16 @@ static inline void clear_user_page(void
  12                 flush_data_cache_page((unsigned long)addr);
  13  }
  14
  15 -extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
  16 -       struct page *to);
  17 -struct vm_area_struct;
  18 -extern void copy_user_highpage(struct page *to, struct page *from,
  19 -       unsigned long vaddr, struct vm_area_struct *vma);
  20 +static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
  21 +       struct page *to)
  22 +{
  23 +       extern void (*flush_data_cache_page)(unsigned long addr);
  24
  25 -#define __HAVE_ARCH_COPY_USER_HIGHPAGE
  26 +       copy_page(vto, vfrom);
  27 +       if (!cpu_has_ic_fills_f_dc ||
  28 +           pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
  29 +               flush_data_cache_page((unsigned long)vto);
  30 +}
  31
  32  /*
  33   * These are used to make use of C type-checking..
  34 --- a/arch/mips/mm/init.c
  35 +++ b/arch/mips/mm/init.c
  36 @@ -202,30 +202,6 @@ void kunmap_coherent(void)
  37         preempt_check_resched();
  38  }
  39
  40 -void copy_user_highpage(struct page *to, struct page *from,
  41 -       unsigned long vaddr, struct vm_area_struct *vma)
  42 -{
  43 -       void *vfrom, *vto;
  44 -
  45 -       vto = kmap_atomic(to, KM_USER1);
  46 -       if (cpu_has_dc_aliases && cpu_use_kmap_coherent &&
  47 -           page_mapped(from) && !Page_dcache_dirty(from)) {
  48 -               vfrom = kmap_coherent(from, vaddr);
  49 -               copy_page(vto, vfrom);
  50 -               kunmap_coherent();
  51 -       } else {
  52 -               vfrom = kmap_atomic(from, KM_USER0);
  53 -               copy_page(vto, vfrom);
  54 -               kunmap_atomic(vfrom, KM_USER0);
  55 -       }
  56 -       if ((!cpu_has_ic_fills_f_dc) ||
  57 -           pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
  58 -               flush_data_cache_page((unsigned long)vto);
  59 -       kunmap_atomic(vto, KM_USER1);
  60 -       /* Make sure this page is cleared on other CPU's too before using it */
  61 -       smp_wmb();
  62 -}
  63 -
  64  void copy_to_user_page(struct vm_area_struct *vma,
  65         struct page *page, unsigned long vaddr, void *dst, const void *src,
  66         unsigned long len)