powerpc: Add trap_nr to thread_struct
authorAnanth N Mavinakayanahalli <ananth@in.ibm.com>
Thu, 23 Aug 2012 21:27:09 +0000 (21:27 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 5 Sep 2012 05:19:36 +0000 (15:19 +1000)
commit41ab5266c3622354353433618edb92ab278025fa
tree5e1313a104ae877a174a88a2c93eb010f1bd5861
parent7118e7e648e0a902bf4f38c55a25fcff730f33d7
powerpc: Add trap_nr to thread_struct

Add thread_struct.trap_nr and use it to store the last exception
the thread experienced. In this patch, we populate the field at
various places where we force_sig_info() to the process.

This is also used in uprobes to determine if the probed instruction
caused an exception.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/include/asm/processor.h
arch/powerpc/kernel/process.c
arch/powerpc/kernel/traps.c
arch/powerpc/mm/fault.c