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SubjectRe: [patch 5/6] lightweight robust futexes: i386
On 2/21/06, Chuck Ebbert <76306.1226@compuserve.com> wrote:
> > + : "=a" (oldval), "=m" (*uaddr)
> ^^^^
> Should be "+m" because it's both read and written.

No, this is why there is the "0" input parameter.


\> > + : "memory"
> ^^^^^^^^
> Is this necessary? Every possible memory location that could be
> affected has been listed in the operands if the above change is made.

This makes the asm a barrier for the compiler.
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