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Re: [PATCH 2/3] libnvdimm, pfn, dax: show supported dax/pfn region alignments in sysfs

From Dan Williams <dan.j.williams@intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH 2/3] libnvdimm, pfn, dax: show supported dax/pfn region alignments in sysfs
Date 2017-08-15 17:50 +0200
Message-ID <ueMgq-37n-35@gated-at.bofh.it> (permalink)
References <udx06-4QR-11@gated-at.bofh.it> <ueDd7-64p-7@gated-at.bofh.it> <ueDPQ-6jk-17@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Mon, Aug 14, 2017 at 11:46 PM, Oliver <oohall@gmail.com> wrote:
> On Tue, Aug 15, 2017 at 4:02 PM, kbuild test robot <lkp@intel.com> wrote:
[..]
>>    114  static const unsigned long *nd_pfn_supported_alignments(void)
>>    115  {
>>    116          /*
>>    117           * This needs to be a local variable because the *_SIZE macros
>>    118           * aren't always constants.
>>    119           */
>
> I probably should have been clearer, "local" here really means
> "non-static". Otherwise the array could have been made a global.
>

Whoops, my fault. How about this:

@@ -127,8 +127,11 @@ static const unsigned long
*nd_pfn_supported_alignments(void)
 #endif
                0,
        };
+       static unsigned long data[ARRAY_SIZE(supported_alignments)];

-       return supported_alignments;
+       memcpy(data, supported_alignments, sizeof(data));
+
+       return data;
 }

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Thread

[PATCH 0/3] libnvdimm: export supported page size alignments Dan Williams <dan.j.williams@intel.com> - 2017-08-12 07:20 +0200
  [PATCH 3/3] libnvdimm, pfn,  dax: limit namespace alignments to the supported set Dan Williams <dan.j.williams@intel.com> - 2017-08-12 07:20 +0200
  [PATCH 2/3] libnvdimm, pfn,  dax: show supported dax/pfn region alignments in sysfs Dan Williams <dan.j.williams@intel.com> - 2017-08-12 07:20 +0200
    Re: [PATCH 2/3] libnvdimm, pfn, dax: show supported dax/pfn region  alignments in sysfs Oliver <oohall@gmail.com> - 2017-08-15 08:50 +0200
      Re: [PATCH 2/3] libnvdimm, pfn, dax: show supported dax/pfn region  alignments in sysfs Dan Williams <dan.j.williams@intel.com> - 2017-08-15 17:50 +0200
        Re: [PATCH 2/3] libnvdimm, pfn, dax: show supported dax/pfn region  alignments in sysfs Oliver <oohall@gmail.com> - 2017-08-16 07:30 +0200

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