[PATCH] powerpc: kprobes: convert __kprobes to NOKPROBE_SYMBOL()

[Naveen N. Rao]

On 2017/03/08 09:42AM, Masami Hiramatsu wrote:
> On Wed,  8 Mar 2017 02:09:29 +0530
> "Naveen N. Rao" <naveen.n.rao at linux.vnet.ibm.com> wrote:
> 
> > Along similar lines as commit 9326638cbee2 ("kprobes, x86: Use
> > NOKPROBE_SYMBOL() instead of __kprobes annotation"), convert __kprobes
> > annotation to either NOKPROBE_SYMBOL() or nokprobe_inline. The latter
> > forces inlining, in which case the caller needs to be added to
> > NOKPROBE_SYMBOL().
> 
> Acked-by: Masami Hiramatsu <mhiramat at kernel.org>
> 
> OK, this is a good starting point so far. please consider that those
> functions really have to be protected by kprobes. As you can see on x86,

Yes, I've only converted static functions to nokprobe_inline and 
confirmed that their callers are protected. I also verified that none of 
these show up in kallsyms.

> I allowed some functions to be kprobed by commit 7ec8a97a990d ("kprobes/x86:
> Allow probe on some kprobe preparation functions").
> Maybe on powerpc, those arch_* functions also be probed safely, since
> those are not kicked in the context of breakpoint interruption.

Nice, thanks for the pointer. I will consider that as part of the kprobe 
blacklisting updates I have for powerpc.

Regards,
Naveen