Messages in this thread | | | Date | Mon, 20 Jun 2011 18:36:18 -0400 (EDT) | From | Nicolas Pitre <> | Subject | Re: [PATCH] USB: ehci: use packed,aligned(4) instead of removing the packed attribute |
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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)) ?
Nicolas
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