[PATCH v2 0/1] tracing: trace_remove_event_call() should fail ifcall/file is in use

From: Oleg Nesterov
Date: Mon Jul 29 2013 - 13:55:44 EST


On top of "[PATCH v2 0/6] tracing: open/delete fixes" series.

Perhaps this series should be updated, Masami has some concerns.
But it seems that you both mostly agree with these changes, so
let me send the "last" patch for review.

The last change in kernel/trace/trace_events.c we need to close the
problems with create/use/delete (at least those which I know ;).

Now we are ready to change trace_kprobe.c and trace_uprobe.c, Steven
already has the patches.


- remove the TRACE_EVENT_FL_REF_MASK (which we do not have)

We rely on the previous changes, we do not care if someone
have an opened file, event_enable_write/etc can do nothing
but fail after we do remove_event_file_dir().

- Add the comment and a note into the changelog to explain
why we still need to check FTRACE_EVENT_FL_ENABLED.


include/linux/ftrace_event.h | 2 +-
kernel/trace/trace_events.c | 35 +++++++++++++++++++++++++++++++++--
2 files changed, 34 insertions(+), 3 deletions(-)

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