Re: [PATCH v2 3/5] locking/arch: Wire up local_try_cmpxchg

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> +static __inline__ bool local_try_cmpxchg(local_t *l, long *old, long new)
> +{
> +       typeof(l->a.counter) *__old = (typeof(l->a.counter) *) old;
> +       return try_cmpxchg_local(&l->a.counter, __old, new);
> +}
> +

This patch then causes following sparse errors:

    ./arch/x86/include/asm/local.h:131:16: warning: symbol '__old'
shadows an earlier one
    ./arch/x86/include/asm/local.h:130:30: originally declared here

This is then visible in all kinds of builds - which makes it hard to
find out actual problems with sparse.



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