target/linux/generic-2.6/patches-2.6.29/022-mips_force_sig_address_errors.patch

   1 When init is started it is SIGNAL_UNKILLABLE.  If it were to get an
   2 address error, we would try to send it SIGBUS, but it would be ignored
   3 and the faulting instruction restarted.  This results in an endless
   4 loop.
   5
   6 We need to use force_sig() instead so it will actually die and give us
   7 some useful information.
   8
   9 Reported-by: Florian Fainelli <florian@openwrt.org>
  10
  11 Signed-off-by: David Daney <ddaney@caviumnetworks.com>
  12 ---
  13  arch/mips/kernel/unaligned.c |    6 +++---
  14  1 files changed, 3 insertions(+), 3 deletions(-)
  15
  16 diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
  17 index bf4c4a9..67bd626 100644
  18 --- a/arch/mips/kernel/unaligned.c
  19 +++ b/arch/mips/kernel/unaligned.c
  20 @@ -482,19 +482,19 @@ fault:
  21                 return;
  22
  23         die_if_kernel("Unhandled kernel unaligned access", regs);
  24 -       send_sig(SIGSEGV, current, 1);
  25 +       force_sig(SIGSEGV, current);
  26
  27         return;
  28
  29  sigbus:
  30         die_if_kernel("Unhandled kernel unaligned access", regs);
  31 -       send_sig(SIGBUS, current, 1);
  32 +       force_sig(SIGBUS, current);
  33
  34         return;
  35
  36  sigill:
  37         die_if_kernel("Unhandled kernel unaligned access or invalid instruction", regs);
  38 -       send_sig(SIGILL, current, 1);
  39 +       force_sig(SIGILL, current);
  40  }
  41
  42  asmlinkage void do_ade(struct pt_regs *regs)
  43 --
  44 1.6.0.6
  45