# Re: \[PATCH 3/5\] powerpc64: Add .opd based function descriptor dereference

- From: Sergey Senozhatsky \<hidden\>
- Date: 2017-09-20 06:10:35 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2017/09/5091479
- Thread: https://ratatoskr.run/linuxppc-dev/2017/09/5089064/t.md

```text
On (09/20/17 11:51), Michael Ellerman wrote:
[..]
> > unlike ppc_function_entry(), printk() can get called on any symbol,
> > not just function pointers.
> >
> > for example,
> >
> > cat /proc/kallsyms | grep shrinker_rwsem
> > ffffffff81a4b1e0 d shrinker_rwsem
> 
> Yep, good point. So your patch is probably good then. Maybe someone
> other than me can find time to test it ;)

Hi,

I'll re-spin the series today/tomorrow.

	-ss
```