RE: Fix ia64 bitops: Full barrier on smp_mb__after_clear_bit()

["Chen, Kenneth W" <kenneth.w.chen@xxxxxxxxx>]

Christoph Lameter wrote on Friday, March 31, 2006 11:31 AM
> This is also the way that powerpc (which faces similar issues) implements 
> these macros.
> 
> include/asm-powerpc/bitops.h:
> 
> /*
>  * clear_bit doesn't imply a memory barrier
>  */
> #define smp_mb__before_clear_bit()      smp_mb()
> #define smp_mb__after_clear_bit()       smp_mb()


Using a totally different architecture to justify a change for ia64
specific implementation is a bit strange to me.  PPC has their own
architecture limitation to deal with, why mix that with ia64?
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