Re: WARNING in memtype_reserve

[Christoph Hellwig]

Guys, can you please start formal thread on this?  I have no
idea where this came from and what the rationale is.  Btw, if the
pfn is crap in dma_direct_mmap then the dma_addr_t passed in is
crap, as it is derived from that.  What is the caller, and how is
this triggered?