linux-stable-rt/arch
Changhwan Youn a50eb1c768 ARM: S5PV310: Set bit 22 in the PL310 (cache controller) AuxCtlr register
This patch is applied according to the commit 1a8e41cd67
(ARM: 6395/1: VExpress: Set bit 22 in the PL310 (cache controller) AuxCtlr register).

Actually, S5PV310 has same cache controller(PL310).

Following is from Catalin Marinas' commit.

Clearing bit 22 in the PL310 Auxiliary Control register (shared
attribute override enable) has the side effect of transforming Normal
Shared Non-cacheable reads into Cacheable no-allocate reads.

Coherent DMA buffers in Linux always have a Cacheable alias via the
kernel linear mapping and the processor can speculatively load cache
lines into the PL310 controller. With bit 22 cleared, Non-cacheable
reads would unexpectedly hit such cache lines leading to buffer
corruption.

Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Cc: <stable@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-12-30 09:37:02 +09:00
..
alpha
arm ARM: S5PV310: Set bit 22 in the PL310 (cache controller) AuxCtlr register 2010-12-30 09:37:02 +09:00
avr32
blackfin
cris
frv
h8300
ia64
m32r
m68k
m68knommu
microblaze
mips MIPS: Fix build errors in sc-mips.c 2010-12-17 19:44:35 +00:00
mn10300 clarify a usage constraint for cnt32_to_63() 2010-12-20 09:07:35 -08:00
parisc parisc: convert the rest of the irq handlers to simple/percpu 2010-12-04 11:15:19 -05:00
powerpc powerpc/mpc5200: include fs.h in mpc52xx_gpt.c 2010-12-23 12:08:02 -07:00
s390
score
sh sh: Fix up SH7201 clkfwk build. 2010-12-24 12:15:57 +09:00
sparc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6 2010-12-14 17:34:00 -08:00
tile arch/tile: handle rt_sigreturn() more cleanly 2010-12-17 16:59:29 -05:00
um
x86 x86/microcode: Fix double vfree() and remove redundant pointer checks before vfree() 2010-12-27 14:33:30 +01:00
xtensa
.gitignore
Kconfig