Re: [PATCH] regmap: Allocate buffers with GFP_ATOMIC when fast_io == true

[Mark Brown]

On Thu, Sep 10, 2015 at 12:27:01PM -0700, Stephen Boyd wrote:
> If a regmap is using fast_io, allocate buffers in the write APIs
> with GFP_ATOMIC instead of GFP_KERNEL. Otherwise we may schedule
> while atomic.

Why is this needed?  If something needs fast I/O it probably doesn't
want to be going down any of the code paths that result in us doing
allocations.  I'd expect either no cache, a flat cache or setting up
defaults at initialisation time.

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