linux-kernel - Re: [PATCH] libnvdimm: remove redundant __func__ in dev

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Date:   Tue, 6 Mar 2018 08:59:11 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:     linux-nvdimm <linux-nvdimm@...ts.01.org>,
        Johannes Thumshirn <jthumshirn@...e.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] libnvdimm: remove redundant __func__ in dev_dbg

On Mon, Mar 5, 2018 at 7:54 PM, Ross Zwisler
<ross.zwisler@...ux.intel.com> wrote:
> On Mon, Mar 05, 2018 at 05:09:21PM -0800, Dan Williams wrote:
>> Dynamic debug can be instructed to add the function name to the debug
>> output using the +f switch, so there is no need for the libnvdimm
>> modules to do it again. If a user decides to add the +f switch for
>> libnvdimm's dynamic debug this results in double prints of the function
>> name.
>>
>> Reported-by: Johannes Thumshirn <jthumshirn@...e.de>
>> Reported-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
>> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
>> ---
>>  drivers/nvdimm/badrange.c       |    3 +-
>>  drivers/nvdimm/btt_devs.c       |   21 ++++++++--------
>>  drivers/nvdimm/bus.c            |   13 +++++-----
>>  drivers/nvdimm/claim.c          |    2 +-
>>  drivers/nvdimm/core.c           |    4 ++-
>>  drivers/nvdimm/dax_devs.c       |    5 ++--
>>  drivers/nvdimm/dimm_devs.c      |    7 ++---
>>  drivers/nvdimm/label.c          |   51 ++++++++++++++++++---------------------
>>  drivers/nvdimm/namespace_devs.c |   38 ++++++++++++-----------------
>>  drivers/nvdimm/pfn_devs.c       |   25 +++++++++----------
>>  drivers/nvdimm/pmem.c           |    2 +-
>>  11 files changed, 77 insertions(+), 94 deletions(-)
>>
>> diff --git a/drivers/nvdimm/badrange.c b/drivers/nvdimm/badrange.c
>> index e068d72b4357..df17f1cd696d 100644
>> --- a/drivers/nvdimm/badrange.c
>> +++ b/drivers/nvdimm/badrange.c
>> @@ -176,8 +176,7 @@ static void set_badblock(struct badblocks *bb, sector_t s, int num)
>>                       (u64) s * 512, (u64) num * 512);
>>       /* this isn't an error as the hardware will still throw an exception */
>>       if (badblocks_set(bb, s, num, 1))
>> -             dev_info_once(bb->dev, "%s: failed for sector %llx\n",
>> -                             __func__, (u64) s);
>> +             dev_info_once(bb->dev, "failed for sector %llx\n", (u64) s);
>
> I don't think you should remove this one.  dev_info_once() is just a printk(),
> and doesn't inherit the +f flag from the dynamic debugging code. The __func__
> here does add value.
>
> The rest of these look correct, though I think you missed one in each of
> nvdimm_map_release()

This one is now fixed.

> and validate_dimm().  (I made these changes as well, but
> you sent out your patch first. :)

The validate_dimm() one is printing the callee function one level up
in the call chain, so it's fine as is.