[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>

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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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77

arch/s390/kernel/kprobes.c

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