"memory" clobber in synchronization primitives

[Ulrich Drepper]

Roland McGrath <roland@frob.com> writes:

> In the linuxthreads pt-machine.h file, the alpha, powerpc, and mips
> definitions of `testandset' use a "memory" clobber in addition to their
> output specs in their GCC `asm', but the i386 definition does not.

I agree that it makes sense to add the clobber and I did so.  If
somebody disagrees let me know.

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