[S390] kprobes breaks BUG_ON

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The illegal operation handler calls the die notifier with DIE_BPT to
let kprobes pick up its breakpoint. If kprobes does not find its
breakpoint it returns NOTIFY_STOP instead of NOTIFY_DONE.
Since we use stop_machine_run on s390 to arm/disarm the kprobes
breakpoints the race that kprobe_handler tries to solve by checking
for the kprobes breakpoints does not exist. Removing the check makes
BUG_ON working again.

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

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Martin Schwidefsky 2007-03-05 23:35:38 +01:00

parent c3442e2965

commit f794c8279d

1 changed files with 7 additions and 14 deletions

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arch/s390/kernel/kprobes.c

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