[PATCH v4 1/7] asm-generic: ticket-lock: New generic ticket-based spinlock

[Heiko Stübner]

Am Samstag, 30. April 2022, 17:36:20 CEST schrieb Palmer Dabbelt:
> From: Peter Zijlstra <peterz at infradead.org>
> 
> This is a simple, fair spinlock.  Specifically it doesn't have all the
> subtle memory model dependencies that qspinlock has, which makes it more
> suitable for simple systems as it is more likely to be correct.  It is
> implemented entirely in terms of standard atomics and thus works fine
> without any arch-specific code.
> 
> This replaces the existing asm-generic/spinlock.h, which just errored
> out on SMP systems.
> 
> Signed-off-by: Peter Zijlstra (Intel) <peterz at infradead.org>
> Signed-off-by: Palmer Dabbelt <palmer at rivosinc.com>

on riscv64+riscv32 qemu, beaglev and d1-nezha

Tested-by: Heiko Stuebner <heiko at sntech.de>