On Thu, Jul 18, 2019 at 08:51:23PM +0000, Alexey Brodkin wrote: > 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. Why is this patch ok for stable kernel trees? Are you not removing existing support in 4.19 for a feature that people might be using there? What bug is this fixing that requires this removal? thanks, greg k-h
