On Fri, Sep 18, 2020 at 06:00:19PM +0800, Shane Chien wrote: > /* clear the buffer for avoiding possible kernel info leaks */ > if (runtime->dma_area && !substream->ops->copy_user) > - memset(runtime->dma_area, 0, runtime->dma_bytes); > + memset_io(runtime->dma_area, 0, runtime->dma_bytes); This is regular RAM that will be accessed by the devices rather than memory mapped regions provided by devices, the _io variants are normally for memory mapped regions on devices.
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