Subject: Re: [PATCH 4/5] dma-direct: provide a arch_dma_clear_uncached hook

From: Christoph Hellwig <[email-masked]>
Date: Mon, 24 Feb 2020 22:56:57 +0100

On Mon, Feb 24, 2020 at 01:53:28PM -0800, Ira Weiny wrote:
> > +	else if (IS_ENABLED(CONFIG_ARCH_HAS_DMA_CLEAR_UNCACHED))
> > +		arch_dma_clear_uncached(cpu_addr, size);
> 
> Isn't using arch_dma_clear_uncached() before patch 5 going to break
> bisectability?

Only if ARCH_HAS_DMA_CLEAR_UNCACHED is selected by anything, which
only happens in patch 5.

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