Will __pa(vmalloc()) ever work?

[Timur Tabi]

I have a driver that calls __pa() on an address obtained via vmalloc().  This is not 
supposed to work, and yet oddly it appears to.  Is there a possibility, even a remote one, 
that __pa() will return the correct physical address for a buffer returned by the 
vmalloc() function?

Also, does the pgd/pmd/pte page-table walking work on addresses returned by kmalloc(), or 
do I have to use __pa() to get the physical address?

--
Timur Tabi
Staff Software Engineer
timur.tabi@xxxxxxxxxxx

One thing a Southern boy will never say is,
"I don't think duct tape will fix it."
     -- Ed Smylie, NASA engineer for Apollo 13
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