Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=linux-2.6.28.y 2008-11-03T17:21:45+00:00 2008-11-03T17:21:45+00:00 Keith Packard keithp@keithp.com 2008-11-03T17:21:45+00:00 urn:sha1:e5beae16901795223d677f15aa2fe192976278ee Impact: cleanup clean up ifdefs: change #ifdef CONFIG_X86_32/64 to CONFIG_HAVE_ATOMIC_IOMAP. flip around the #ifdef sections to clean up the structure. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> 2008-10-31T09:12:39+00:00 Keith Packard keithp@keithp.com 2008-10-31T02:38:18+00:00 urn:sha1:9663f2e6a6cf3f82b06d8fb699b11b80f92553ba Impact: add new generic io_map_*() APIs Graphics devices have large PCI apertures which would consume a significant fraction of a 32-bit address space if mapped during driver initialization. Using ioremap at runtime is impractical as it is too slow. This new set of interfaces uses atomic mappings on 32-bit processors and a large static mapping on 64-bit processors to provide reasonable 32-bit performance and optimal 64-bit performance. The current implementation sits atop the io_map_atomic fixmap-based mechanism for 32-bit processors. This includes some editorial suggestions from Randy Dunlap for Documentation/io-mapping.txt Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>