Re: [Bug 10489] Kprobe smoke test lockdep warning

[Masami Hiramatsu]

Masami Hiramatsu wrote:
> processor's IF bit is changed when an iret(q) is issued.
> In other words, when returning from a debug/int3 exception.

By the way, when returning from an exception on x86-64, it seems
paranoidexit@xxxxxxxxxx doesn't use TRACE_IRQS_IRETQ except for
it executes swapgs, does it?

If not, I guess the lockdep on x86-64 may causes an warning
by below code:

spin_lock(...)
kprobe_target_function()
spin_unlock(...)

Thanks,

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@xxxxxxxxxx

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