Re: [PATCH] wait_on_bit: add an acquire memory barrier

[Mikulas Patocka]

On Fri, 26 Aug 2022, Ard Biesheuvel wrote:

> Could you try booting with earlycon?
> 
> Just 'earlycon' and if that does not help,

It doesn't help.

> 'earlycon=uart8250,mmio32,<uart PA>' [IIRC, mcbin uses 16550
> compatible UARTs, right?]

mcbin is the host system (running a stable kernel fine). The crash happens 
in a virtual machine. The vm uses /dev/ttyAMA0 as a console:

Serial: AMBA PL011 UART driver
9000000.pl011: ttyAMA0 at MMIO 0x9000000 (irq = 45, base_baud = 0) is a PL011 rev1
printk: console [ttyAMA0] enabled

I tried earlycon=pl011,mmio32,0x9000000 - but it doesn't help, it hangs 
without printing anything.

Mikulas