Re: HELP: Is writeq an atomic operation??

David Miller
2008-05-02T22:32:10Z

From: "Moore, Eric" <Eric.Moore@lsi.com>
Date: Fri, 2 May 2008 16:19:49 -0600

> Is a 64bit write to MMIO registers an atomic operation when using the
> writeq API?

The answer to this question this is platform dependent.

On most 64-bit platforms, it is. On some 32-bit ones, it is not.

This is not a SCSI layer question, so belongs minimally on
linux-kernel which I've CC:'d.