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author | Oleg Nesterov <oleg@redhat.com> | 2013-01-31 19:47:23 +0100 |
---|---|---|
committer | Oleg Nesterov <oleg@redhat.com> | 2013-02-08 18:24:33 +0100 |
commit | a932b7381f81235530c3d0acbd3ba2c7537d78e5 (patch) | |
tree | 01fb4bbdd21cb67c63b6302ffbbbda22fdcbebcd /kernel/trace/trace_uprobe.c | |
parent | b64b007797c1e6d6b745c93c296ba1d5f4d72d86 (diff) | |
download | linux-stable-a932b7381f81235530c3d0acbd3ba2c7537d78e5.tar.gz linux-stable-a932b7381f81235530c3d0acbd3ba2c7537d78e5.tar.bz2 linux-stable-a932b7381f81235530c3d0acbd3ba2c7537d78e5.zip |
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>
Diffstat (limited to 'kernel/trace/trace_uprobe.c')
-rw-r--r-- | kernel/trace/trace_uprobe.c | 35 |
1 files changed, 6 insertions, 29 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index d6c6e2a345a7..9c8babbfd11b 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 @@ alloc_trace_uprobe(const char *group, const char *event, int nargs) goto error; INIT_LIST_HEAD(&tu->list); + tu->consumer.handler = uprobe_dispatcher; return tu; 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) { - 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 @@ static void probe_event_disable(struct trace_uprobe *tu, int flag) 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 @@ 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) { - 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); |