[PATCH 1/2] ARM: BUG if jumping to usermode address in kernel mode

[Russell King - ARM Linux]

On Mon, Nov 27, 2017 at 03:27:03PM +0100, Marek Szyprowski wrote:
> Dear All,
> 
> On 2017-11-25 12:33, Russell King wrote:
> >Detect if we are returning to usermode via the normal kernel exit paths
> >but the saved PSR value indicates that we are in kernel mode.  This
> >could occur due to corrupted stack state, which has been observed with
> >"ftracetest".
> >
> >This ensures that we catch the problem case before we get to user code.
> >
> >Signed-off-by: Russell King <rmk+kernel at armlinux.org.uk>
> 
> This patch brakes kernel booting on Exynos 4412-based Odroid U3 board:

"brakes" are what you have on a car. "breaks" is the verb, which is
what you mean here.

It's known as of this morning, and I have a patch going through the
build testers at the moment.

Just replace the 0xcf in these with PSR_I_BIT | 0x0f.

Also wonder why your platform is running with SCR.FW clear...

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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