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| author | Steven Rostedt <[email protected]> | 2012-06-05 10:28:14 +0000 |
|---|---|---|
| committer | Steven Rostedt <[email protected]> | 2012-07-31 14:29:55 +0000 |
| commit | 72ef3794c5cd5f5f0e6355c24a529224c449cd14 (patch) | |
| tree | 3c8c4bb28009aa938c9e24b33914d11852ec4712 /tools/perf/util/scripting-engines/trace-event-perl.c | |
| parent | ftrace: add ftrace_set_filter_ip() for address based filter (diff) | |
| download | kernel-72ef3794c5cd5f5f0e6355c24a529224c449cd14.tar.gz kernel-72ef3794c5cd5f5f0e6355c24a529224c449cd14.zip | |
kprobes: Inverse taking of module_mutex with kprobe_mutex
Currently module_mutex is taken before kprobe_mutex, but this
can cause issues when we have kprobes register ftrace, as the ftrace
mutex is taken before enabling a tracepoint, which currently takes
the module mutex.
If module_mutex is taken before kprobe_mutex, then we can not
have kprobes use the ftrace infrastructure.
There seems to be no reason that the kprobe_mutex can't be taken
before the module_mutex. Running lockdep shows that it is safe
among the kernels I've run.
Link: http://lkml.kernel.org/r/[email protected]
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ananth N Mavinakayanahalli <[email protected]>
Cc: "Frank Ch. Eigler" <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-perl.c')
0 files changed, 0 insertions, 0 deletions