Kernel - My Linux kernel repository

Age	Commit message (Collapse)	Author
2009-01-26	x86: work around PAGE_KERNEL_WC not getting WC in iomap_atomic_prot_pfn.	Eric Anholt
	In the absence of PAT, PAGE_KERNEL_WC ends up mapping to a memory type that gets UC behavior even in the presence of a WC MTRR covering the area in question. By swapping to PAGE_KERNEL_UC_MINUS, we can get the actual behavior the caller wanted (WC if you can manage it, UC otherwise). This recovers the 40% performance improvement of using WC in the DRM to upload vertex data. Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-10-31	x86: add iomap_atomic*()/iounmap_atomic() on 32-bit using fixmaps	Keith Packard
	Impact: introduce new APIs, separate kmap code from CONFIG_HIGHMEM This takes the code used for CONFIG_HIGHMEM memory mappings except that it's designed for dynamic IO resource mapping. These fixmaps are available even with CONFIG_HIGHMEM turned off. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>