On Fri, May 27, 2005 at 08:29:25PM +0100, Christoph Hellwig wrote:
> 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.
__pa() is only defined to works on the direct-mapped kernel region.
The fact that it works on some architectures should be viewed as a
bug.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
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