1. 07 Feb, 2007 1 commit
    • Kumar Gala's avatar
      [POWERPC] Enable interrupts if we are doing fp math emulation · 04903a30
      Kumar Gala authored
      
      
      Anytime we are emulating an instruction we are going to be doing some form of
      get_user() to get the instruction image to decode.  Since get_user() might
      sleep we need to ensure we have interrupts enabled or we might see something
      like:
      
      Debug: sleeping function called from invalid context at arch/powerpc/kernel/traps.c:697
      in_atomic():0, irqs_disabled():1
      Call Trace:
      [D6023EB0] [C0007F84] show_stack+0x58/0x174 (unreliable)
      [D6023EE0] [C0022C34] __might_sleep+0xbc/0xd0
      [D6023EF0] [C000D158] program_check_exception+0x1d8/0x4fc
      [D6023F40] [C000E744] ret_from_except_full+0x0/0x4c
      --- Exception: 700 at 0x102a7100
          LR = 0xdb9ef04
      
      However, we want to ensure that interrupts are disabled when handling a trap
      exception that might be used for a kernel breakpoint.  This is why ProgramCheck
      is marked as EXC_XFER_STD instead of EXC_XFER_EE.
      Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
      04903a30
  2. 06 Feb, 2007 39 commits