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From:	Ralf Baechle <ralf@oss.sgi.com>
To:	"Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
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Subject: Re: User applications
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In-Reply-To: <Pine.GSO.3.96.1010108162406.23234I-100000@delta.ds2.pg.gda.pl>; from macro@ds2.pg.gda.pl on Mon, Jan 08, 2001 at 04:40:06PM +0100
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On Mon, Jan 08, 2001 at 04:40:06PM +0100, Maciej W. Rozycki wrote:

> > than flushing the caches - so long as by "flush" we mean invalidate
> > with writeback (on copyback caches), of course.
> 
>  What's wrong with cacheflush(addr, count, which) that actually checks if
> <addr; addr+count> lies within the caller's address space before
> performing the flush and returns -EPERM otherwise?  It would make the
> caller crawl like a turtle if it wished to but it would leave other
> processes alone. 

cacheflush(2) actually is supposed to handle things that way.

  Ralf