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    SubjectRe: [PATCH 1/2] percpu: add percpu_variable_ptr()
    Tejun Heo wrote:
    > On 06/23/2010 12:04 PM, Lai Jiangshan wrote:
    >> The percpu variable and allocated percpu data are compatible
    >> witch each other, This patch adds a API, thus we can use
    >> per_cpu_ptr() for defined/declared percpu variable.
    >>
    >> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
    >> ---
    >> diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
    >> index ce2dc65..d5c8d7f 100644
    >> --- a/include/linux/percpu-defs.h
    >> +++ b/include/linux/percpu-defs.h
    >> @@ -81,6 +81,12 @@
    >> #endif
    >>
    >> /*
    >> + * Ptr of the declared/defined per-CPU variable.
    >> + * It is totally compatible with the return from alloc_percpu().
    >> + */
    >> +#define percpu_variable_ptr(name) (&(name))
    >
    > Why not just use &name?
    >

    I remember the real variable name is hidden.
    We can't expose the inner details of percpu, so I add a macro for it.

    Thanks,
    Lai


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