[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, 1 insertions, 0 deletions

diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c
index 698079b3a336..d0323cd6a2ea 100644
--- a/arch/xtensa/kernel/asm-offsets.c
+++ b/arch/xtensa/kernel/asm-offsets.c
@@ -39,6 +39,7 @@ int main(void)
         DEFINE(PT_LEND, offsetof (struct pt_regs, lend));
         DEFINE(PT_LCOUNT, offsetof (struct pt_regs, lcount));
         DEFINE(PT_SAR, offsetof (struct pt_regs, sar));
+        DEFINE(PT_ICOUNTLEVEL, offsetof (struct pt_regs, icountlevel));
         DEFINE(PT_SYSCALL, offsetof (struct pt_regs, syscall));
         DEFINE(PT_AREG, offsetof (struct pt_regs, areg[0]));
         DEFINE(PT_AREG0, offsetof (struct pt_regs, areg[0]));