Re: [PATCH v2 -next] spi: fix spi-sprd-adi build errors when SPI_SPRD_ADI=y and HWSPINLOCK=m

[Mark Brown]

On Mon, Sep 25, 2017 at 09:20:31PM +0200, Geert Uytterhoeven wrote:

> The issue is builtin drivers that depend on a modular API.  The clean way
> is to separate API and implementation, so the API can be builtin, and the
> implementation can be modular.
> Hence the API should provide stubs that call into function pointers, to be
> registered by the module providing the implementation.

In this case the problem is even more basic in that the driver does
actually depend on having hwspinlocks for any production use.

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