On Wed, 27 Feb 2008, Andrew Morton wrote:

quoted text
> Doing ++ on a u32 _is_ atomic wrt interrupts on x86 and probably lots of
> other architectures, so we're OK using unsigned there.  

So you make implicit assumptions about how gcc compiles your ++? I am 
afraid you can't do that, gcc is absolutely free to turn variable++; 
statement to non-atomic sequence of instructions (memory->register load, 
increment register, for example).

-- 
Jiri Kosina
SUSE Labs

--
unsubscribe notice
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/