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Problem about Vsys_allocBuf in dvrrdk4.0 dm8168

Hi all:

I develop on dm8168 use dvrrdk4.0,

and now i want to use Vsys_allocBuf to alloc share mem between dsp and A8 side,

The questions is how to sync between these two cores, and how to do mux,

as no lock, no notify each other?

in link notify is attached ,but how to do this when use Vsys_allocBuf

best regards

xavier