Re: [PATCH] atomic_long_t & include/asm-generic/atomic.h V2

[David S. Miller]

From: Andi Kleen <ak@xxxxxxx>
Date: Wed, 14 Dec 2005 03:57:10 +0100

> > > How about requiring that all 64-bit archs implement atomic64_t and do:
> > 
> > It may be reasonable to have 64 bit arches that are not 
> > capable of 64 bit atomic ops. As far as I can remember sparc was initially
> > a 32 bit platform without 32 bit atomic ops.
> 
> Why? I don't think we have any crippled 64bit platforms like this.
> And if somebody wants to port linux to such a hypothetical crippled
> 64bit platform they can do the necessary work themselves.
> 
> Or just implement 64bit atomic_t with spinlocks.

I definitely agree with Andi here.
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