tracing/uprobes: Support event triggering

Add support for event triggering to uprobes.  This is same as kprobes
support added by Tom (plus cleanup by Steven).

Link: http://lkml.kernel.org/r/1389946120-19610-5-git-send-email-namhyung@kernel.org

Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 349c6df9e332..01fcb0db75cb 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -776,6 +776,9 @@ static void __uprobe_trace_func(struct trace_uprobe *tu,
         if (WARN_ON_ONCE(tu->tp.size + dsize > PAGE_SIZE))
                 return;
 
+        if (ftrace_trigger_soft_disabled(ftrace_file))
+                return;
+
         esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));
         size = esize + tu->tp.size + dsize;
         event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
@@ -795,8 +798,7 @@ static void __uprobe_trace_func(struct trace_uprobe *tu,
 
         memcpy(data, ucb->buf, tu->tp.size + dsize);
 
-        if (!call_filter_check_discard(call, entry, buffer, event))
-                trace_buffer_unlock_commit(buffer, event, 0, 0);
+        event_trigger_unlock_commit(ftrace_file, buffer, event, entry, 0, 0);
 }
 
 /* uprobe handler */