On Fri, Sep 9, 2016 at 1:50 PM, Arnd Bergmann <a...@arndb.de> wrote: > On Friday, September 9, 2016 1:43:17 PM CEST Hoan Tran wrote: >> >> > * Are you sure you don't need any smp_rmb()/smp_wmb() barriers >> > between the accesses? >> >> No, we don't need a strict read/write during access PCC subspace. Just >> make sure all access is committed before PCC send message to the >> platform which done by PCC mailbox driver. >> > > Ok, got it. The PCC mailbox driver presumably uses writel() to > send the message, and that implies the necessary barrier > (unlike writel_relaxed), right?
Yes, Hoan > > Arnd > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
