Andrew Morton schrieb:

On Mon, 05 Feb 2007 02:42:09 +0100 Tilman Schmidt [off-list ref] wrote:

quoted

It's a pointer. Are reads and writes of pointer sized objects
guaranteed to be atomic on every platform?

Yup - we make the same assumption about longs in various places.

It's a bit strange to read a pointer which can be changing at the
same time.  Because the local copy will no longer represent the
thing which it was just copied from.

It's not that bad. The only possible concurrent change is from NULL
to non-NULL. Fearing an inconsistent read in that event was too
paranoid apparently.

Thanks for all your suggestions. I'll prepare a new patch based on
them.

-- 
Tilman Schmidt                    E-Mail: tilman@imap.cc
Bonn, Germany
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