uprobes/tracing: Kill uprobe_trace_consumer, embed uprobe_consumer into trace_uprobe
trace_uprobe->consumer and "struct uprobe_trace_consumer" add the
unnecessary indirection and complicate the code for no reason.
This patch simply embeds uprobe_consumer into "struct trace_uprobe",
all other changes only fix the compilation errors.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index d6c6e2a..9c8babb 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -31,17 +31,11 @@
/*
* uprobe event core functions
*/
-struct trace_uprobe;
-struct uprobe_trace_consumer {
- struct uprobe_consumer cons;
- struct trace_uprobe *tu;
-};
-
struct trace_uprobe {
struct list_head list;
struct ftrace_event_class class;
struct ftrace_event_call call;
- struct uprobe_trace_consumer *consumer;
+ struct uprobe_consumer consumer;
struct inode *inode;
char *filename;
unsigned long offset;
@@ -92,6 +86,7 @@
goto error;
INIT_LIST_HEAD(&tu->list);
+ tu->consumer.handler = uprobe_dispatcher;
return tu;
error:
@@ -546,27 +541,15 @@
static int probe_event_enable(struct trace_uprobe *tu, int flag)
{
- struct uprobe_trace_consumer *utc;
int ret = 0;
if (is_trace_uprobe_enabled(tu))
return -EINTR;
- utc = kzalloc(sizeof(struct uprobe_trace_consumer), GFP_KERNEL);
- if (!utc)
- return -EINTR;
-
- utc->cons.handler = uprobe_dispatcher;
- utc->tu = tu;
- tu->consumer = utc;
tu->flags |= flag;
-
- ret = uprobe_register(tu->inode, tu->offset, &utc->cons);
- if (ret) {
- tu->consumer = NULL;
+ ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);
+ if (ret)
tu->flags &= ~flag;
- kfree(utc);
- }
return ret;
}
@@ -576,10 +559,8 @@
if (!is_trace_uprobe_enabled(tu))
return;
- uprobe_unregister(tu->inode, tu->offset, &tu->consumer->cons);
+ uprobe_unregister(tu->inode, tu->offset, &tu->consumer);
tu->flags &= ~flag;
- kfree(tu->consumer);
- tu->consumer = NULL;
}
static int uprobe_event_define_fields(struct ftrace_event_call *event_call)
@@ -717,13 +698,9 @@
static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs)
{
- struct uprobe_trace_consumer *utc;
struct trace_uprobe *tu;
- utc = container_of(con, struct uprobe_trace_consumer, cons);
- tu = utc->tu;
- if (!tu || tu->consumer != utc)
- return 0;
+ tu = container_of(con, struct trace_uprobe, consumer);
if (tu->flags & TP_FLAG_TRACE)
uprobe_trace_func(tu, regs);