ksym_tracer: Fix validation of access type
# echo 'pid_max:rw-' > ksym_trace_filter
# cat ksym_trace_filter
pid_max:rw-
# echo 'pid_max:ww-' > ksym_trace_filter
(should return -EINVAL)
# cat ksym_trace_filter
(but it ended up removing filter entry)
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <
4A52E2CE.
6080409@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>