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| author | Steven Rostedt <srostedt@redhat.com> | 2012-06-05 19:28:14 +0900 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2012-07-31 10:29:55 -0400 |
| commit | 72ef3794c5cd5f5f0e6355c24a529224c449cd14 (patch) | |
| tree | 3c8c4bb28009aa938c9e24b33914d11852ec4712 /net/ipv4/tcp_westwood.c | |
| parent | 647664eaf4033501739ac1f42dd52ce8c9266ccc (diff) | |
| download | op-kernel-dev-72ef3794c5cd5f5f0e6355c24a529224c449cd14.zip op-kernel-dev-72ef3794c5cd5f5f0e6355c24a529224c449cd14.tar.gz | |
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/20120605102814.27845.21047.stgit@localhost.localdomain
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'net/ipv4/tcp_westwood.c')
0 files changed, 0 insertions, 0 deletions
