target/linux/ar71xx/patches/902-mips_clocksource_init_war.patch

   1 --- a/include/asm-mips/hazards.h
   2 +++ b/include/asm-mips/hazards.h
   3 @@ -64,7 +64,7 @@
   4         _ehb
   5         )
   6  ASMMACRO(back_to_back_c0_hazard,
   7 -        _ehb
   8 +        _ssnop; _ssnop; _ssnop; _ehb
   9         )
  10  /*
  11   * gcc has a tradition of misscompiling the previous construct using the
  12 --- a/arch/mips/kernel/cevt-r4k.c
  13 +++ b/arch/mips/kernel/cevt-r4k.c
  14 @@ -187,7 +187,7 @@
  15          */
  16         if (c0_compare_int_pending()) {
  17                 write_c0_compare(read_c0_count());
  18 -               irq_disable_hazard();
  19 +               back_to_back_c0_hazard();
  20                 if (c0_compare_int_pending())
  21                         return 0;
  22         }
  23 @@ -196,7 +196,7 @@
  24                 cnt = read_c0_count();
  25                 cnt += delta;
  26                 write_c0_compare(cnt);
  27 -               irq_disable_hazard();
  28 +               back_to_back_c0_hazard();
  29                 if ((int)(read_c0_count() - cnt) < 0)
  30                     break;
  31                 /* increase delta if the timer was already expired */
  32 @@ -205,11 +205,12 @@
  33         while ((int)(read_c0_count() - cnt) <= 0)
  34                 ;       /* Wait for expiry  */
  35
  36 +       back_to_back_c0_hazard();
  37         if (!c0_compare_int_pending())
  38                 return 0;
  39
  40         write_c0_compare(read_c0_count());
  41 -       irq_disable_hazard();
  42 +       back_to_back_c0_hazard();
  43         if (c0_compare_int_pending())
  44                 return 0;
  45