This is a note to let you know that I've just added the patch titled
ARM: fix bad applied patch for arch/arm/Kconfig of stable 3.0.y tree.
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-fix-bad-applied-patch-for-arch-arm-kconfig-of-stable-3.0.y-tree.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From [email protected] Tue Sep 25 15:07:29 2012
From: Tetsuyuki Kobayashi <[email protected]>
Date: Thu, 13 Sep 2012 13:29:30 +0900
Subject: ARM: fix bad applied patch for arch/arm/Kconfig of stable 3.0.y tree.
To: [email protected]
Cc: [email protected], [email protected], [email protected],
[email protected], Tetsuyuki Kobayashi <[email protected]>
Message-ID: <[email protected]>
From: Tetsuyuki Kobayashi <[email protected]>
No upstream commit as this is a merge error in the 3.0 tree.
ARM_ERRATA_764369 and PL310_ERRATA_769419 do not appear in config menu in
stable 3.0.y tree.
This is because backported patch for arm/arm/Kconfig applied wrong place.
This patch solves it.
Signed-off-by: Tetsuyuki Kobayashi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arm/Kconfig | 52 ++++++++++++++++++++++++++--------------------------
1 file changed, 26 insertions(+), 26 deletions(-)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1234,6 +1234,32 @@ config ARM_ERRATA_754327
This workaround defines cpu_relax() as smp_mb(), preventing correctly
written polling loops from denying visibility of updates to memory.
+config ARM_ERRATA_764369
+ bool "ARM errata: Data cache line maintenance operation by MVA may not
succeed"
+ depends on CPU_V7 && SMP
+ help
+ This option enables the workaround for erratum 764369
+ affecting Cortex-A9 MPCore with two or more processors (all
+ current revisions). Under certain timing circumstances, a data
+ cache line maintenance operation by MVA targeting an Inner
+ Shareable memory region may fail to proceed up to either the
+ Point of Coherency or to the Point of Unification of the
+ system. This workaround adds a DSB instruction before the
+ relevant cache maintenance functions and sets a specific bit
+ in the diagnostic control register of the SCU.
+
+config PL310_ERRATA_769419
+ bool "PL310 errata: no automatic Store Buffer drain"
+ depends on CACHE_L2X0
+ help
+ On revisions of the PL310 prior to r3p2, the Store Buffer does
+ not automatically drain. This can cause normal, non-cacheable
+ writes to be retained when the memory system is idle, leading
+ to suboptimal I/O performance for drivers using coherent DMA.
+ This option adds a write barrier to the cpu_idle loop so that,
+ on systems with an outer cache, the store buffer is drained
+ explicitly.
+
endmenu
source "arch/arm/common/Kconfig"
@@ -1298,32 +1324,6 @@ source "drivers/pci/Kconfig"
source "drivers/pcmcia/Kconfig"
-config ARM_ERRATA_764369
- bool "ARM errata: Data cache line maintenance operation by MVA may not
succeed"
- depends on CPU_V7 && SMP
- help
- This option enables the workaround for erratum 764369
- affecting Cortex-A9 MPCore with two or more processors (all
- current revisions). Under certain timing circumstances, a data
- cache line maintenance operation by MVA targeting an Inner
- Shareable memory region may fail to proceed up to either the
- Point of Coherency or to the Point of Unification of the
- system. This workaround adds a DSB instruction before the
- relevant cache maintenance functions and sets a specific bit
- in the diagnostic control register of the SCU.
-
-config PL310_ERRATA_769419
- bool "PL310 errata: no automatic Store Buffer drain"
- depends on CACHE_L2X0
- help
- On revisions of the PL310 prior to r3p2, the Store Buffer does
- not automatically drain. This can cause normal, non-cacheable
- writes to be retained when the memory system is idle, leading
- to suboptimal I/O performance for drivers using coherent DMA.
- This option adds a write barrier to the cpu_idle loop so that,
- on systems with an outer cache, the store buffer is drained
- explicitly.
-
endmenu
menu "Kernel Features"
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/arm-fix-bad-applied-patch-for-arch-arm-kconfig-of-stable-3.0.y-tree.patch
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