Re: [RFC][PATCH v2 0/7] printk/ia64/ppc64/parisc64: let's deprecate %pF/%pf printk specifiers
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- To: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, James Bottomley <jejb@xxxxxxxxxxxxxxxx>
- Subject: Re: [RFC][PATCH v2 0/7] printk/ia64/ppc64/parisc64: let's deprecate %pF/%pf printk specifiers
- From: Helge Deller <deller@xxxxxx>
- Date: Wed, 20 Sep 2017 22:14:49 +0200
- Cc: Petr Mladek <pmladek@xxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Jessica Yu <jeyu@xxxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
- In-reply-to: <20170920162910.32053-1-sergey.senozhatsky@gmail.com>
- References: <20170920162910.32053-1-sergey.senozhatsky@gmail.com>
- User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0
On 20.09.2017 18:29, Sergey Senozhatsky wrote:
This patch set attempts to move ia64/ppc64/parisc64 C function
pointer ABI details out of printk() to arch code. Function dereference
code now checks if a pointer belongs to a .opd ELF section and dereferences
that pointer only if it does. The kernel and modules have their own .opd
sections that's why I use two different ARCH functions: for kernel and
for module pointer dereference.
...> *** A BIG NOTE ***
I don't own ia64/ppc64/parisc64 hardware, so the patches are not
tested. Sorry about that!
I just now tested your patch series successfully on parisc64.
You may add to the whole series:
Tested-by: Helge Deller <deller@xxxxxx> # parisc64
Another note:
I need to check what is BPF symbol lookup and do we need to
do any dereference there.
Not relevant for parisc, since we don't support it yet.
Helge
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