Re: [PATCH AUTOSEL 5.15 17/82] arm64: dts: rockchip: add Coresight debug range for RK3399
From: Sasha Levin <sashal@kernel.org>
Date: 2021-11-10 00:44:48
Also in:
linux-arm-kernel, linux-rockchip, lkml, stable
On Tue, Nov 09, 2021 at 03:25:39PM -0800, Brian Norris wrote:
On Tue, Nov 9, 2021 at 2:17 PM Sasha Levin [off-list ref] wrote:quoted
From: Brian Norris <briannorris@chromium.org> [ Upstream commit 75dccea503b8e176ad044175e891d7bb291b6ba0 ] Per Documentation/devicetree/bindings/arm/coresight-cpu-debug.txt. This IP block can be used for sampling the PC of any given CPU, which is useful in certain panic scenarios where you can't get the CPU to stop cleanly (e.g., hard lockup).I don't understand why this is being backported to -stable. First of all, it won't work because it's missing dependencies (specifically, around the RK3399 clock driver). But even if it did, I don't see how this is a candidate for -stable. Methinks the AI has gone too far again.
Possibly. We try to take patches that enable existing hardware (or hardware features) where the logic is already in the kernel but it's missing something like adding a new PCI ID or a quirk. This also seems to happen with devicetree files which is why this patch got pulled in. I'll drop it if it depends on patches that didn't make it in. Thanks! -- Thanks, Sasha