[PATCH 4/4] of/fdt: only store the device node basename in full_name

Rob Herring robh at kernel.org
Thu Jul 27 00:10:49 AEST 2017

On Wed, Jul 26, 2017 at 5:26 AM, Michael Ellerman <mpe at ellerman.id.au> wrote:
> Rob Herring <robh at kernel.org> writes:
>> With dependencies on a statically allocated full path name converted to
>> use %pOF format specifier, we can store just the basename of node, and
>> the unflattening of the FDT can be simplified.
>> This commit will affect the remaining users of full_name. After
>> analyzing these users, the remaining cases should only change some print
>> messages. The main users of full_name are providing a name for struct
>> resource. The resource names shouldn't be important other than providing
>> /proc/iomem names.
>> We no longer distinguish between pre and post 0x10 dtb formats as either
>> a full path or basename will work. However, less than 0x10 formats have
>> been broken since the conversion to use libfdt (and no one has cared).
> For the record - yes we did care. It broke booting with old versions of
> kexec, and it was a royal P.I.T.# to debug :D

Sorry, I forgot about that one. I'll drop the statement. I had gone
back and looked and only found the issue on mpc8323 booting[1] which
was an issue with libfdt having more checks on the fdt. I proposed
some fixes, but never heard back on that.


[1] https://lkml.org/lkml/2015/6/10/820

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