Re: [PATCH] USB: ehci: use packed,aligned(4) instead of removing thepacked attribute
From: Nicolas Pitre
Date: Mon Jun 20 2011 - 18:36:22 EST
On Mon, 20 Jun 2011, Alan Stern wrote:
> On Mon, 20 Jun 2011, Nicolas Pitre wrote:
> > > As far as I can tell, the other structures in ehci.h have
> > > ((aligned(32)) simply in order to save space, since there can be large
> > > numbers of these structures allocated.
> > How can increasing the alignment to 32 bytes save space?
> No, no -- the alignment is _decreased_ to 32 bits. Without the
> attribute the alignment would have been 64 bits.
The aligned attribute requires a byte value not a bit value.
Maybe what you meant is ((aligned(4)) ?
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