linux-kernel - Re: [PATCH 3/5] powerpc64: Add .opd based function descriptor dereference

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Message-ID: <20170920061026.GB6298@jagdpanzerIV.localdomain>
Date:   Wed, 20 Sep 2017 15:10:26 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        "James E . J . Bottomley" <jejb@...isc-linux.org>,
        Helge Deller <deller@....de>, Petr Mladek <pmladek@...e.com>,
        linux-ia64@...r.kernel.org, linux-parisc@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org, Jessica Yu <jeyu@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linuxppc-dev@...ts.ozlabs.org, Nicholas Piggin <npiggin@...il.com>
Subject: Re: [PATCH 3/5] powerpc64: Add .opd based function descriptor
 dereference

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