tracing: fprobe: Fix to init fprobe_ip_table earlier

Since the fprobe_ip_table is used from module unloading in
the failure path of load_module(), it must be initialized in
the earlier timing than late_initcall(). Unless that, the
fprobe_module_callback() will use an uninitialized spinlock of
fprobe_ip_table.

Initialize fprobe_ip_table in core_initcall which is the same
timing as ftrace.

Link: https://lore.kernel.org/all/[e-mail]/

Reported-by: kernel test robot <[e-mail]>
Closes: https://lore.kernel.org/oe-lkp/[e-mail]
Fixes: e5a4cc28a052 ("tracing: fprobe: use rhltable for fprobe_ip_table")
Signed-off-by: Masami Hiramatsu (Google) <[e-mail]>
Reviewed-by: Menglong Dong <[e-mail]>

kernel/trace/fprobe.c

···
 	rhltable_init(&fprobe_ip_table, &fprobe_rht_params);
 	return 0;
 }
-late_initcall(fprobe_initcall);
+core_initcall(fprobe_initcall);