[S390] kprobes: single step cleanup

The saved interrupt mask and the saved control registers are only
relevant while single stepping is set up. A secondary kprobe while
kprobe single stepping is active may not occur. That makes is safe
to remove the save and restore of kprobe_saved_imask / kprobe_save_ctl
from save_previous_kprobe and restore_previous_kprobe.
Move all single step related code to two functions, enable_singlestep
and disable_singlestep.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/arch/s390/include/asm/kprobes.h b/arch/s390/include/asm/kprobes.h
index 330f68caffe4..15d0dec8dbb4 100644
--- a/arch/s390/include/asm/kprobes.h
+++ b/arch/s390/include/asm/kprobes.h
@@ -72,9 +72,6 @@ struct ins_replace_args {
 struct prev_kprobe {
         struct kprobe *kp;
         unsigned long status;
-        unsigned long saved_psw;
-        unsigned long kprobe_saved_imask;
-        unsigned long kprobe_saved_ctl[3];
 };
 
 /* per-cpu kprobe control block */