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[S390] kprobes: single step cleanup

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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>
This commit is contained in:
Martin Schwidefsky
2011-01-05 12:47:17 +01:00
committed by Martin Schwidefsky
parent 35f2aaa79a
commit fc0a1fea6b
2 changed files with 36 additions and 44 deletions
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3
arch/s390/include/asm/kprobes.h
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@@ -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 */