Arnd Bergmann wrote:
If that's in the probe() called from it function, just use writel() everywhere, a few extra microseconds won't kill the boot time. In general, if a user would notice the difference, use the relaxed version and add a comment to explain how you proved it's correct, otherwise stay with the default accessors.
What about adding a wmb() after the last writel()? This driver does that a lot. Is that something we want to discourage? I can understand how we would want to make sure that the last write is posted before the function exits.
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