[PATCH] powerpc: book3e_64: fix the align size for paca_struct

[Benjamin Herrenschmidt]

On Mon, 2015-03-09 at 09:13 +0800, Kevin Hao wrote:
> On Sun, Mar 08, 2015 at 08:13:26PM +1100, Benjamin Herrenschmidt wrote:
> > On Sat, 2015-03-07 at 19:14 +0800, Kevin Hao wrote:
> > > All the cache line size of the current book3e 64bit SoCs are 64 bytes.
> > > So we should use this size to align the member of paca_struct.
> > > With this change we save 192 bytes. Also change it to __aligned(size)
> > > since it is preferred over __attribute__((aligned(size))).
> > 
> > Why should we favor the book3e CPUs over the book3s ones ?
> 
> Why do you think so? This only change the align size of the paca_struct's
> members which are private to book3e CPUs, and should not have any effect
> to book3s ones. Did I miss something?

No, your explanation was lacking that important detail :-)

> Thanks,
> Kevin