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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>
This commit is contained in:
Oleg Nesterov 2013-01-31 19:47:23 +01:00
parent b64b007797
commit a932b7381f
1 changed files with 6 additions and 29 deletions
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35
kernel/trace/trace_uprobe.c
View File

@ -31,17 +31,11 @@
/* /*
* uprobe event core functions * uprobe event core functions
*/ */
struct trace_uprobe;
struct uprobe_trace_consumer {
struct uprobe_consumer cons;
struct trace_uprobe *tu;
};
struct trace_uprobe { struct trace_uprobe {
struct list_head list; struct list_head list;
struct ftrace_event_class class; struct ftrace_event_class class;
struct ftrace_event_call call; struct ftrace_event_call call;
struct uprobe_trace_consumer *consumer; struct uprobe_consumer consumer;
struct inode *inode; struct inode *inode;
char *filename; char *filename;
unsigned long offset; unsigned long offset;
@ -92,6 +86,7 @@ alloc_trace_uprobe(const char *group, const char *event, int nargs)
goto error; goto error;
INIT_LIST_HEAD(&tu->list); INIT_LIST_HEAD(&tu->list);
tu->consumer.handler = uprobe_dispatcher;
return tu; return tu;
error: error:
@ -546,27 +541,15 @@ static inline bool is_trace_uprobe_enabled(struct trace_uprobe *tu)
static int probe_event_enable(struct trace_uprobe *tu, int flag) static int probe_event_enable(struct trace_uprobe *tu, int flag)
{ {
struct uprobe_trace_consumer *utc;
int ret = 0; int ret = 0;
if (is_trace_uprobe_enabled(tu)) if (is_trace_uprobe_enabled(tu))
return -EINTR; 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; tu->flags |= flag;
ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);
ret = uprobe_register(tu->inode, tu->offset, &utc->cons); if (ret)
if (ret) {
tu->consumer = NULL;
tu->flags &= ~flag; tu->flags &= ~flag;
kfree(utc);
}
return ret; return ret;
} }
@ -576,10 +559,8 @@ static void probe_event_disable(struct trace_uprobe *tu, int flag)
if (!is_trace_uprobe_enabled(tu)) if (!is_trace_uprobe_enabled(tu))
return; return;
uprobe_unregister(tu->inode, tu->offset, &tu->consumer->cons); uprobe_unregister(tu->inode, tu->offset, &tu->consumer);
tu->flags &= ~flag; tu->flags &= ~flag;
kfree(tu->consumer);
tu->consumer = NULL;
} }
static int uprobe_event_define_fields(struct ftrace_event_call *event_call) static int uprobe_event_define_fields(struct ftrace_event_call *event_call)
@ -717,13 +698,9 @@ int trace_uprobe_register(struct ftrace_event_call *event, enum trace_reg type,
static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs) static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs)
{ {
struct uprobe_trace_consumer *utc;
struct trace_uprobe *tu; struct trace_uprobe *tu;
utc = container_of(con, struct uprobe_trace_consumer, cons); tu = container_of(con, struct trace_uprobe, consumer);
tu = utc->tu;
if (!tu || tu->consumer != utc)
return 0;
if (tu->flags & TP_FLAG_TRACE) if (tu->flags & TP_FLAG_TRACE)
uprobe_trace_func(tu, regs); uprobe_trace_func(tu, regs);