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e36863a550
linux/arch/mips
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Dezhong Diao e36863a550 MIPS: HIGHMEM DMA on noncoherent MIPS32 processors 
[v4: Patch applies to linux-queue.git with kmap_atomic patches:
 https://patchwork.kernel.org/patch/189932/
 https://patchwork.kernel.org/patch/194552/
 https://patchwork.kernel.org/patch/189912/ ]

The MIPS DMA coherency functions do not work properly (i.e. kernel oops)
when HIGHMEM pages are passed in as arguments.  Use kmap_atomic() to
temporarily map high pages for cache maintenance operations.

Tested on a 2.6.36-rc7 1GB HIGHMEM SMP no-alias system.

Signed-off-by: Dezhong Diao <dediao@cisco.com>
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: Dezhong Diao <dediao@cisco.com>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: David VomLehn <dvomlehn@cisco.com>
Cc: Sergei Shtylyov <sshtylyov@mvista.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1695/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-07-25 17:26:52 +01:00
..
alchemy Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-19 17:44:13 -07:00
ar7 MIPS: AR7: Replace __attribute__((__packed__)) with __packed 2011-07-25 17:23:20 +01:00
ath79 USB: ohci: add bus glue for the Atheros AR71XX/AR7240 SoCs 2011-04-13 16:58:19 -07:00
bcm47xx MIPS: BCM47xx: Extend the filling of SPROM from NVRAM 2011-05-19 09:55:47 +01:00
bcm63xx SSB: Change fallback sprom to callback mechanism. 2011-05-19 09:55:47 +01:00
boot MIPS: Alchemy: Rewrite UART setup and constants. 2011-05-19 09:55:45 +01:00
cavium-octeon Merge git://git.infradead.org/mtd-2.6 2011-05-27 20:06:53 -07:00
cobalt MIPS: Move Cobalt Makefile parts to their own Platform file 2010-08-05 13:25:47 +01:00
configs rtc: fix build warnings in defconfigs 2011-06-15 20:04:02 -07:00
dec MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
emma MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
fw Merge branch 'master' into for-next 2011-04-26 10:22:59 +02:00
include/asm MIPS: topdown mmap support 2011-07-25 17:26:51 +01:00
jazz MIPS: Jazz: Fix GCC 4.6.0 build error 2011-05-10 18:15:23 +01:00
jz4740 Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-19 17:44:13 -07:00
kernel MIPS: Remove redundant addr_limit assignment on exec. 2011-07-25 17:23:29 +01:00
lantiq MIPS: Lantiq: Add missing clk_enable and clk_disable functions. 2011-07-20 23:12:12 +01:00
lasat MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
lib MIPS: Kconfig and Makefile update for Netlogic XLR/XLS 2011-05-19 09:55:40 +01:00
loongson Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-19 17:44:13 -07:00
math-emu Fix common misspellings 2011-03-31 11:26:23 -03:00
mipssim MIPS: MIPSsim: Fix uniprocessor build. 2011-07-20 23:12:11 +01:00
mm MIPS: HIGHMEM DMA on noncoherent MIPS32 processors 2011-07-25 17:26:52 +01:00
mti-malta MIPS: Malta: Fix crash in SMP kernel on non-CMP systems. 2011-07-20 23:12:10 +01:00
netlogic MIPS: Netlogic: SMP fixes for XLR/XLS platform code. 2011-07-20 23:12:11 +01:00
nxp/pnx8550/common MIPS: PNX8550: Move code one directory level up. 2010-08-05 13:25:56 +01:00
oprofile mips: change to new flag variable 2011-03-17 14:02:56 +01:00
pci MIPS: NILE4: Remove useless inclusion of GT64120 header. 2011-07-20 23:12:09 +01:00
pmc-sierra MIPS: Malta: Fix crash in SMP kernel on non-CMP systems. 2011-07-20 23:12:10 +01:00
pnx833x Fix common misspellings 2011-03-31 11:26:23 -03:00
pnx8550 MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
power MIPS: Hibernation: Fixes for PAGE_SIZE >= 64kb 2011-05-10 18:15:26 +01:00
powertv MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
rb532 MIPS: RB532: Fix iomap resource size miscalculation. 2011-05-18 14:18:26 +01:00
sgi-ip22 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-05-23 09:12:26 -07:00
sgi-ip27 Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-19 17:44:13 -07:00
sgi-ip32 MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
sibyte MIPS: SB1250: Restore dropped irq_mask function 2011-07-20 23:12:11 +01:00
sni MIPS: SNI: Fix GCC 4.6.0 build error 2011-05-10 18:15:23 +01:00
txx9 Merge git://git.infradead.org/mtd-2.6 2011-05-27 20:06:53 -07:00
vr41xx mips: vr41xx: Use irdq_irq_disabled() 2011-03-29 14:48:07 +02:00
wrppmc MIPS: WRPPMC: Migrate to new platform makefile style. 2010-08-05 13:25:51 +01:00
Kbuild MIPS: Repair Kbuild make clean breakage. 2010-10-19 18:32:39 +01:00
Kbuild.platforms MIPS: XLR, XLS: Move makefile bits to were they belong. 2011-07-20 23:12:11 +01:00
Kconfig arch: remove CONFIG_GENERIC_FIND_{NEXT_BIT,BIT_LE,LAST_BIT} 2011-05-26 17:12:38 -07:00
Kconfig.debug lib: consolidate DEBUG_STACK_USAGE option 2011-05-25 08:39:54 -07:00
Makefile MIPS: XLR, XLS: Move makefile bits to were they belong. 2011-07-20 23:12:11 +01:00