Messages in this thread | | | Date | Fri, 27 May 2005 20:29:25 +0100 | From | Christoph Hellwig <> | Subject | Re: Will __pa(vmalloc()) ever work? |
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On Fri, May 27, 2005 at 02:26:36PM -0500, Timur Tabi wrote: > 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?
It will return the correct physical address for the start of the buffer. But given that vmalloc is a non-contingous allocator that's pretty useless.
As are physical addresses for anything but low-level architecture code.
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