Re: Fix locking in input

[Manfred Spraul]

Russell King wrote:

> On Sun, Nov 23, 2003 at 11:24:02PM +0100, Manfred Spraul wrote:
>  
>
> > I think one platform (early ARM?) cannot access bytes directly, and 
> > implement the access with read 16-bit, change 8-bit, write back 16 bit. 
> >    
>
> Nope.
It seems it's Alpha:

On Thu, 28 Dec 2000, Linus wrote:

> FreeBSD doesn't try to be portable any more, but Linux does, and there are
> architectures where 8- and 16-bit accesses aren't *atomic* but have to be
> done with read-modify-write cycles.
>
> And even for fields like "age", where we don't care whether the age itself
> is 100% accurate, we _do_ care that the fields close-by don't get strange
> effects from updating "age". We used to have exactly this problem on alpha
> back in the 2.1.x timeframe.


--
   Manfred

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