WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[XenPPC] Re: [RFC PATCH 28/33] Add Xen grant table support

I object to these uses of (synch_)cmpxchg on a uint16_t in common code.
Many architectures, including PowerPC, do not support 2-byte atomic
operations, but this code is common to all Xen architectures.

RMW operations you mean, I suppose.  On PowerPC, all (naturally
aligned) halfword operations are atomic; there do not exist any
RMW operations; but word and doubleword atomic RMW operations
can be emulated.

Boils down to the same thing of course, but it isn't the same ;-)


Segher


_______________________________________________
Xen-ppc-devel mailing list
Xen-ppc-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ppc-devel

<Prev in Thread] Current Thread [Next in Thread>