RE: [PATCH v2 2/2] ARC: enable uboot support unconditionally

[Alexey Brodkin]

Hi Greg,

> -----Original Message-----
> From: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
> Sent: Thursday, February 14, 2019 6:08 PM
> To: linux-snps-arc@xxxxxxxxxxxxxxxxxxx; Vineet Gupta <vgupta@xxxxxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx; Alexey Brodkin <abrodkin@xxxxxxxxxxxx>; Corentin Labbe
> <clabbe@xxxxxxxxxxxx>; khilman@xxxxxxxxxxxx; Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
> Subject: [PATCH v2 2/2] ARC: enable uboot support unconditionally
> 
> After reworking U-boot args handling code and adding paranoid
> arguments check we can eliminate CONFIG_ARC_UBOOT_SUPPORT and
> enable uboot support unconditionally.
> 
> For JTAG case we can assume that core registers will come up
> reset value of 0 or in worst case we rely on user passing
> '-on=clear_regs' to Metaware debugger.
> 
> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>

May we have this one back-ported to linux-4.19.y?

It was initially applied to Linus' tree during 5.0 development
cycle [1] but was never back-ported.

Now w/o that patch in KernelCI we see boot failure on ARC HSDK
board [2] as opposed to normally working later kernel versions.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=493a2f812446e92bcb1e69a77381b4d39808d730
[2] https://storage.kernelci.org/stable/linux-4.19.y/v4.19.59/arc/hsdk_defconfig/gcc-8/lab-baylibre/boot-hsdk.txt

Below is that same patch but rebased on linux-4.19 as in its pristine
form it won't apply due to offset of one of hunks.

-Alexey

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