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    SubjectRe: [PATCH] futex: cmpxchg_futex_value_locked API change
    Michel Lespinasse <> wrote:

    > The cmpxchg_futex_value_locked API was funny in that it returned either
    > the original, user-exposed futex value OR an error code such as -EFAULT.
    > This was confusing at best, and could be a source of livelocks in places
    > that retry the cmpxchg_futex_value_locked after trying to fix the issue
    > by running fault_in_user_writeable().
    > This change makes the cmpxchg_futex_value_locked API more similar to the
    > get_futex_value_locked one, returning an error code and updating the
    > original value through a reference argument.
    > Signed-off-by: Michel Lespinasse <>

    Acked-by: David Howells <> [FRV]

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      Last update: 2011-03-09 13:45    [W:0.019 / U:4.068 seconds]
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