Provided by: linux-doc-2.6.15_2.6.15-23.39_all bug

NAME

       virt_to_phys - map virtual addresses to physical

SYNOPSIS

       unsigned long virt_to_phys  (volatile void * address);

ARGUMENTS

       address
              address to remap

DESCRIPTION

       The  returned  physical  address  is the physical (CPU) mapping for the
       memory address given.  It  is  only  valid  to  use  this  function  on
       addresses directly mapped or allocated via kmalloc.

       This  function  does not give bus mappings for DMA transfers. In almost
       all conceivable cases a device driver should not be using this function

AUTHORS

       Matthew Wilcox <matthew@wil.cx>, Alan Cox <alan@redhat.com>.