android_kernel_xiaomi_sm8350/arch
Eric Anholt ef5fa0ab24 x86: work around PAGE_KERNEL_WC not getting WC in iomap_atomic_prot_pfn.
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>
2009-01-26 11:14:27 +01:00
..
alpha PCI: alpha: use generic INTx swizzle from PCI core 2009-01-07 11:13:13 -08:00
arm Merge git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-nommu 2009-01-09 14:00:58 -08:00
avr32 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2009-01-09 11:52:14 -08:00
blackfin NOMMU: Make VMAs per MM as for MMU-mode linux 2009-01-08 12:04:47 +00:00
cris Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-01-07 11:31:52 -08:00
frv NOMMU: Make VMAs per MM as for MMU-mode linux 2009-01-08 12:04:47 +00:00
h8300 NOMMU: Make VMAs per MM as for MMU-mode linux 2009-01-08 12:04:47 +00:00
ia64 Merge branch 'cpus4096-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-01-10 06:12:18 -08:00
m32r
m68k
m68knommu NOMMU: Make VMAs per MM as for MMU-mode linux 2009-01-08 12:04:47 +00:00
mips Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-01-07 15:41:01 -08:00
mn10300
parisc parisc: introduce asm/swab.h 2009-01-09 12:46:23 -08:00
powerpc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile 2009-01-09 12:43:06 -08:00
s390 [S390] Use unsigned long long for u64 on 64bit. 2009-01-09 12:15:07 +01:00
sh NOMMU: Make VMAs per MM as for MMU-mode linux 2009-01-08 12:04:47 +00:00
sparc generic swap(): sparc: rename swap() to swap_ulong() 2009-01-08 08:31:14 -08:00
um
x86 x86: work around PAGE_KERNEL_WC not getting WC in iomap_atomic_prot_pfn. 2009-01-26 11:14:27 +01:00
xtensa xtensa: introduce swab.h 2009-01-07 12:22:04 -08:00
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