kprobes: Allow probe on some kprobe functions

There is no need to prohibit probing on the functions
used for preparation, registeration, optimization,
controll etc. Those are safely probed because those are
not invoked from breakpoint/fault/debug handlers,
there is no chance to cause recursive exceptions.

Following functions are now removed from the kprobes blacklist:

	add_new_kprobe
	aggr_kprobe_disabled
	alloc_aggr_kprobe
	alloc_aggr_kprobe
	arm_all_kprobes
	__arm_kprobe
	arm_kprobe
	arm_kprobe_ftrace
	check_kprobe_address_safe
	collect_garbage_slots
	collect_garbage_slots
	collect_one_slot
	debugfs_kprobe_init
	__disable_kprobe
	disable_kprobe
	disarm_all_kprobes
	__disarm_kprobe
	disarm_kprobe
	disarm_kprobe_ftrace
	do_free_cleaned_kprobes
	do_optimize_kprobes
	do_unoptimize_kprobes
	enable_kprobe
	force_unoptimize_kprobe
	free_aggr_kprobe
	free_aggr_kprobe
	__free_insn_slot
	__get_insn_slot
	get_optimized_kprobe
	__get_valid_kprobe
	init_aggr_kprobe
	init_aggr_kprobe
	in_nokprobe_functions
	kick_kprobe_optimizer
	kill_kprobe
	kill_optimized_kprobe
	kprobe_addr
	kprobe_optimizer
	kprobe_queued
	kprobe_seq_next
	kprobe_seq_start
	kprobe_seq_stop
	kprobes_module_callback
	kprobes_open
	optimize_all_kprobes
	optimize_kprobe
	prepare_kprobe
	prepare_optimized_kprobe
	register_aggr_kprobe
	register_jprobe
	register_jprobes
	register_kprobe
	register_kprobes
	register_kretprobe
	register_kretprobe
	register_kretprobes
	register_kretprobes
	report_probe
	show_kprobe_addr
	try_to_optimize_kprobe
	unoptimize_all_kprobes
	unoptimize_kprobe
	unregister_jprobe
	unregister_jprobes
	unregister_kprobe
	__unregister_kprobe_bottom
	unregister_kprobes
	__unregister_kprobe_top
	unregister_kretprobe
	unregister_kretprobe
	unregister_kretprobes
	unregister_kretprobes
	wait_for_kprobe_optimizer

I tested those functions by putting kprobes on all
instructions in the functions with the bash script
I sent to LKML. See:

  https://lkml.org/lkml/2014/3/27/33

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Link: http://lkml.kernel.org/r/20140417081753.26341.57889.stgit@ltc230.yrl.intra.hitachi.co.jp
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: fche@redhat.com
Cc: systemtap@sourceware.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --cc kernel/kprobes.c
Simple merge