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r4k_dma_cache_inv_pc() does writeback

To: linux-mips@oss.sgi.com
Subject: r4k_dma_cache_inv_pc() does writeback
From: Jun Sun <jsun@mvista.com>
Date: Mon, 30 Oct 2000 10:45:05 -0800
Sender: owner-linux-mips@oss.sgi.com
It just occur to me that r4k_dma_cache_inv_pc() actually does a
writeback before it invalidates the cache.  Is there story behind it? 
Or just a plain bug?

If it is a bug, I don't find an easy way to invalidate the whole dcache
other than writing a new function, perhaps in r4kcache.h.

Jun

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