On Mon, 8 Mar 2021 17:59:47 -0800, Davidlohr Bueso wrote:

A few updates while going through the powerpc port of the qspinlock.

Patches 1 and 2 are straightforward, while patch 3 can be considered
more of an rfc as I've only tested on a single machine, and there
could be an alternative way if it doesn't end up being nearly a
universal performance win.

[...]

Applied to powerpc/next.

[1/3] powerpc/spinlock: Define smp_mb__after_spinlock only once
      https://git.kernel.org/powerpc/c/2bf3604c415c9d75311141b8eb6ac8780ef74420
[2/3] powerpc/spinlock: Unserialize spin_is_locked
      https://git.kernel.org/powerpc/c/66f60522138c2e0d8a3518edd4979df11a2d7525
[3/3] powerpc/qspinlock: Use generic smp_cond_load_relaxed
      https://git.kernel.org/powerpc/c/deb9b13eb2571fbde164ae012c77985fd14f2f02

cheers