Re: [PATCH] isp1760: Flush the D-cache for the pipe-in transfer buffers

[Sebastian Andrzej Siewior]

* Catalin Marinas | 2010-02-02 11:11:35 [+0000]:

>When the HDC driver writes the data to the transfer buffers it pollutes
>the D-cache (unlike DMA drivers where the device writes the data). If
>the corresponding pages get mapped into user space, there are no
>additional cache flushing operations performed and this causes random
>user space faults on architectures with separate I and D caches
>(Harvard) or those with aliasing D-cache.

After looking through lib/scatterlist.c it uses 
#include <linux/highmem.h>

and 

flush_kernel_dcache_page().
Wouldn't this do the job here as well?

Sebastain
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