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CONFIG_CPU_HAS_WB (or to sync or to nop)

To: linux-mips@oss.sgi.com
Subject: CONFIG_CPU_HAS_WB (or to sync or to nop)
From: Kevin Paul Herbert <kph@ayrnetworks.com>
Date: Wed, 27 Feb 2002 13:00:22 -0800
Sender: owner-linux-mips@oss.sgi.com
What is the intention of CONFIG_CPU_HAS_WB? On an RM7000, am I better off doing a pipeline flush (the nops in wbflush.h) or a sync instruction? Also, any guidance on whether I should go out and ensure writes have completed in PCI host adapters and bridges, or whether this is excessive paranoia.

Thanks,
Kevin
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