[PATCH v4] ARM: early fixmap support for earlycon

Stefan Agner stefan at agner.ch
Sun Jul 5 23:45:47 PDT 2015

On 2015-06-17 21:43, Russell King - ARM Linux wrote:
> On Wed, Jun 17, 2015 at 01:43:17PM +0200, Stefan Agner wrote:
>> On 2015-06-17 00:32, Russell King - ARM Linux wrote:
>> > On Tue, Jun 16, 2015 at 11:51:47PM +0200, Stefan Agner wrote:
>> >> Add early fixmap support, initially to support permanent, fixed
>> >> mapping support for early console. A temporary, early pte is
>> >> created which is migrated to a permanent mapping in paging_init.
>> >> This is also needed since the attributes may change as the memory
>> >> types are initialized. The 3MiB range of fixmap spans two pte
>> >> tables, but currently only one pte is created for early fixmap
>> >> support.
>> >>
>> >> Re-add FIX_KMAP_BEGIN to the index calculation in highmem.c since
>> >> the index for kmap does not start at zero anymore. This reverts
>> >> 4221e2e6b316 ("ARM: 8031/1: fixmap: remove FIX_KMAP_BEGIN and
>> >> FIX_KMAP_END") to some extent.
>> >
>> > Sorry, this isn't going to make the next merge window, I've closed my
>> > tree at the end of last week to new submissions (because it got too
>> > painful to maintain the for-next branch due to the number of cross-
>> > dependencies between branches.)  The only patches I'll entertain this
>> > week and throughout the merge window are bug fixes.
>> Ok no problem, I guess it's anyway a good idea to add it early in the
>> development cycle so the change gets a bit more testing coverage. Shall
>> I rebase the patch just after the merge window and send it out again or
>> add the patch in its current state to your patch tracker?
> Please rebase (if necessary) on -rc1 and send to the patch tracker if
> there are no significant changes to it (I doubt there will be.)  If
> everything during the merge window works as it should, -rc1 should
> basically be the contents of linux-next just before the merge window
> opens, plus any fixes that are needed along the way.

Added with the additional Tested-by tags to the patch tracker (ID
8399/1). No updates were required.


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