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Subject: Re: Force IDE cache flush on shutdown
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
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> 
> There is one problem with using ->shutdown:
> handling of SYS_RESTART isn't the same as of SYS_HALT and SYS_POWER_OFF.

See my other comment... I think this duplicates what the suspend 
callback does (though fixing that might not be a 2.6 option).

Ben.