Re: How to add/drop SCSI drives from within the driver?

From: Matthew Wilcox
Date: Wed Dec 08 2004 - 10:41:54 EST


On Wed, Dec 08, 2004 at 08:07:55AM -0600, Matt Domsch wrote:
> > +} ld_device_address_t;
>
> I would also suggest __attribute__((packed)) since you're sharing with
> userspace just to ensure you can never get it grown by the compiler
> (it shouldn't be, but just to be safe).

That's a bad idea, it forces the compiler to pessimise accesses to the
struct on most hardware.

--
"Next the statesmen will invent cheap lies, putting the blame upon
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince
himself that the war is just, and will thank God for the better sleep
he enjoys after this process of grotesque self-deception." -- Mark Twain
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