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[S390] kprobes: single stepped breakpoint

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Remove special case of a kprobe on a breakpoint while a relocated
instruction is single stepped. The only instruction that may cause
a fault while kprobe single stepping is active is the relocated
instruction. There is no kprobe on the instruction slot retrieved
with get_insn_slot().

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2011-01-05 12:47:16 +01:00 committed by Martin Schwidefsky
parent 6f9a3c3306
commit 35f2aaa79a
1 changed files with 0 additions and 6 deletions
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6
arch/s390/kernel/kprobes.c
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@ -273,12 +273,6 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
if (kprobe_running()) {
p = get_kprobe(addr);
if (p) {
if (kcb->kprobe_status == KPROBE_HIT_SS &&
*p->ainsn.insn == BREAKPOINT_INSTRUCTION) {
regs->psw.mask &= ~PSW_MASK_PER;
regs->psw.mask |= kcb->kprobe_saved_imask;
goto no_kprobe;
}
/* We have reentered the kprobe_handler(), since
* another probe was hit while within the handler.
* We here save the original kprobes variables and