Messages in this thread Patch in this message | | | Date | Mon, 28 Jan 2013 19:25:04 +0100 | From | Oleg Nesterov <> | Subject | [PATCH 5/5] uprobes: Kill trace_uprobe->enabled, introduce is_trace_uprobe_enabled() |
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Finally kill trace_uprobe->enabled and add is_trace_uprobe_enabled() which can rely on TP_FLAG_TRACE/TP_FLAG_PROFILE bits we set/clear anyway.
Note that we could do this from the very beginning, ->enabled was never strictly needed. But I'd prefer to do this as a last change so that it can be dropped if the reviewers do not like the (ab)use of tu->flags.
Signed-off-by: Oleg Nesterov <oleg@redhat.com> --- kernel/trace/trace_uprobe.c | 13 +++++++------ 1 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 642e003..1e1633c 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -40,7 +40,6 @@ struct trace_uprobe { struct list_head list; struct ftrace_event_class class; struct ftrace_event_call call; - bool enabled; struct uprobe_consumer consumer; struct trace_uprobe_filter filter; struct inode *inode; @@ -633,31 +632,33 @@ partial: return TRACE_TYPE_PARTIAL_LINE; } +static inline bool is_trace_uprobe_enabled(struct trace_uprobe *tu) +{ + return tu->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE); +} + static int probe_event_enable(struct trace_uprobe *tu, int flag) { int ret = 0; - if (tu->enabled) + if (is_trace_uprobe_enabled(tu)) return -EINTR; tu->flags |= flag; ret = uprobe_register(tu->inode, tu->offset, &tu->consumer); if (ret) tu->flags &= ~flag; - else - tu->enabled = true; return ret; } static void probe_event_disable(struct trace_uprobe *tu, int flag) { - if (!tu->enabled) + if (!is_trace_uprobe_enabled(tu)) return; uprobe_unregister(tu->inode, tu->offset, &tu->consumer); tu->flags &= ~flag; - tu->enabled = false; } static int uprobe_event_define_fields(struct ftrace_event_call *event_call) -- 1.5.5.1
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