tree 8af751c66d53ad37859ac7fce40b1aa04fc14fd1
parent a7b1d74e872a4299e1aef66a648316c9c23e5ab4
author Masami Hiramatsu <mhiramat@kernel.org> 1541408415 +0900
committer Steven Rostedt (VMware) <rostedt@goodmis.org> 1544320448 -0500

tracing/uprobes: Add busy check when cleanup all uprobes

Add a busy check loop in cleanup_all_probes() before
trying to remove all events in uprobe_events, the same way
that kprobe_events does.

Without this change, writing null to uprobe_events will
try to remove events but if one of them is enabled, it will
stop there leaving some events cleared and others not clceared.

With this change, writing null to uprobe_events makes
sure all events are not enabled before removing events.
So, it clears all events, or returns an error (-EBUSY)
with keeping all events.

Link: http://lkml.kernel.org/r/154140841557.17322.12653952888762532401.stgit@devbox

Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>