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SubjectRe: [PATCH 1/19] MUTEX: Introduce simple mutex implementation
Alan Cox writes:
> Actually a PS to this while I think about it. spin_locks and mutex type
> locks could both do with a macro for
> call_locked(&lock, foo(a,b,c,d))

reiser4 code was publicly humiliated for such macros, but indeed they
are useful. The only problem is that one needs two macros: one for foo()
returning void and one for all other cases.

> to cut down on all the error path forgot to release a lock type errors.

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