Re: Will __pa(vmalloc()) ever work?

[Christoph Hellwig]

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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