[OpenAFS-devel] porting openafs to another linux - problems w ith vRefcount type..

[Nickolai Zeldovich]

> Although it would be better to use the atomic_* interfaces I'd say. But that
> would require cleaning up stray references to it throughout the code.
> (Probably a good thing to do anyway.)

It looks like all we'd need to do is convert the refcount increments
and decrements into VN_HOLD/VN_RELE calls (and of course make VN_HOLD
an atomic_inc), and convert the rest to use something like these:

  #ifndef AFS_LINUX24_ENV
  #define VREFCOUNT(v)            (v).vrefCount
  #define VREFCOUNT_SET(v, c)     (v).vrefCount=c
  #else
  #define VREFCOUNT(v)            atomic_read(&(v).v_count)
  #define VREFCOUNT_SET(v, c)     atomic_set(&(v).v_count, c)
  #endif

grep suggests there's only 20-30 places that would have to be changed,
so shouldn't be very hard.  I'll try to go through and do this sometime
later tonight, unless someone beats me to it.  (Am I missing anything?)

-- kolya