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authorMyron Stowe <myron.stowe@hp.com>2010-10-21 16:23:53 -0400
committerLen Brown <len.brown@intel.com>2010-10-24 23:25:52 -0400
commit620242ae8c3d9c0b1a77451744fb2d855d1e7342 (patch)
tree33271319c7628aa51998fadf5df0f492c36abb4f /drivers/atm/fore200e.h
parentb3ba1efec2a58f4dc0647f4c0099c27d6ab92595 (diff)
ACPI: Maintain a list of ACPI memory mapped I/O remappings
For memory mapped I/O (MMIO) remappings, add a list to maintain the remappings and augment the corresponding mapping and unmapping interface routines (acpi_os_map_memory() and acpi_os_unmap_memory()) to dynamically add to, and delete from, the list. The current ACPI I/O accessing methods - acpi_read() and acpi_write() - end up calling ioremap() when accessing MMIO. This prevents use of these methods within interrupt context (IRQ and/or NMI), since ioremap() may block to allocate memory. Maintaining a list of MMIO remappings enables accesses to such areas from within interrupt context provided they have been pre-mapped. Signed-off-by: Myron Stowe <myron.stowe@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/atm/fore200e.h')
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