Christoph Lameter wrote on Thursday, March 30, 2006 4:45 PM
> > I would make that MODE_RELEASE for clear_bit, simply to match the
> > observation that clear_bit is usually used in unlock path and have
> > potential less surprises.
>
> clear_bit per se is defined as an atomic operation with no implications
> for release or acquire. If it is used for release then either add the
> appropriate barrier or use MODE_RELEASE explicitly.
>
> It precise the uncleanness in ia64 that such semantics are attached to
> these bit operations which may lead people to depend on those. We need to
> either make these explicit or not depend on them.
I know, I'm saying since it doesn't make any difference from API point of
view whether it is acq, rel, or no ordering, then just make them rel as a
"preferred" Operation on ia64.
- Ken
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
