tracing/kprobes: Do the notrace functions check without kprobes on ftrace
authorMasami Hiramatsu <mhiramat@kernel.org>
Fri, 8 Jan 2021 04:19:38 +0000 (13:19 +0900)
committerSteven Rostedt (VMware) <rostedt@goodmis.org>
Mon, 11 Jan 2021 21:09:53 +0000 (16:09 -0500)
commit7bb83f6fc4ee84e95d0ac0d14452c2619fb3fe70
treeecc5c6bbc76a1340cdda234b4f1be1ac31b14d1e
parente71ba9452f0b5b2e8dc8aa5445198cd9214a6a62
tracing/kprobes: Do the notrace functions check without kprobes on ftrace

Enable the notrace function check on the architecture which doesn't
support kprobes on ftrace but support dynamic ftrace. This notrace
function check is not only for the kprobes on ftrace but also
sw-breakpoint based kprobes.
Thus there is no reason to limit this check for the arch which
supports kprobes on ftrace.

This also changes the dependency of Kconfig. Because kprobe event
uses the function tracer's address list for identifying notrace
function, if the CONFIG_DYNAMIC_FTRACE=n, it can not check whether
the target function is notrace or not.

Link: https://lkml.kernel.org/r/20210105065730.2634785-1-naveen.n.rao@linux.vnet.ibm.com
Link: https://lkml.kernel.org/r/161007957862.114704.4512260007555399463.stgit@devnote2
Cc: stable@vger.kernel.org
Fixes: 45408c4f92506 ("tracing: kprobes: Prohibit probing on notrace function")
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
kernel/trace/Kconfig
kernel/trace/trace_kprobe.c