On Tue, Sep 04, 2007 at 01:39:37PM +0200, Gabriel Paubert wrote: > That's wrong if lock is assigned to r0, you should use > a "b" constraint to avoid this. Same for atomic_dec below. GCC should really have removed r0 from the "r" class (it isn't truly a general-purpose register), and had a different class meaning "r"-plus-r0. -Scott