>#ifdef __KERNEL__
>
>#define ATOMIC_INIT(i) { (i) }
>
>#define atomic_read(v) ((v)->counter)
>#define atomic_set(v,i) (((v)->counter) = (i))
>
>
>etc.
>
>Not using atomic reads where they are necessary would seem like a bad
>idea. Are the ones in pcm_meter (and maybe they are used elsewhere)
>really necessary? And if they are, shouldn't that code be kernel side?
>Or is there a different way to do it in userland?
the macros in asm/atomic.h are perfectly usable from user space.
however, atomic.h is a *kernel header*, and linus has made it very
clear that no user space program should ever include these headers.
the solution is quite simple (and the one he advocates): copy the
contents of the header file to a new location and use that. most of my
code includes <pbd/atomic.h> which contains a copy of the relevant
stuff for several linux architectures.
--p
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