| From | Segher Boessenkool <> | Subject | Re: [RFC PATCH 28/33] Add Xen grant table support | Date | Tue, 25 Jul 2006 21:06:51 +0200 |
| |
> 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
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|