[XTENSA] Remove non-rt signal handling

The non-rt signal handling was never really used, so we don't break
anything. This patch also cleans up the signal stack-frame to make
it independent from the processor configuration. It also improves
the method used for controlling single-stepping. We now save and
restore the 'icountlevel' register that controls single stepping
and set or clear the saved state to enable or disable it.

Signed-off-by: Chris Zankel <chris@zankel.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/asm-xtensa/ptrace.h b/include/asm-xtensa/ptrace.h
index cad83e814d69..77ff02d307bb 100644
--- a/include/asm-xtensa/ptrace.h
+++ b/include/asm-xtensa/ptrace.h
@@ -99,7 +99,8 @@ struct pt_regs {
         unsigned long windowbase;       /*  48 */
         unsigned long windowstart;      /*  52 */
         unsigned long syscall;          /*  56 */
-        int reserved[2];                /*  64 */
+        unsigned long icountlevel;      /*  60 */
+        int reserved[1];                /*  64 */
 
         /* Make sure the areg field is 16 bytes aligned. */
         int align[0] __attribute__ ((aligned(16)));