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ARM: errata: Remove SMP dependency for erratum 720789

Message ID 1323347866-29493-1-git-send-email-dave.martin@linaro.org
State Not Applicable
Headers show

Commit Message

Dave Martin Dec. 8, 2011, 12:37 p.m. UTC 
Activation conditions for a workaround should not be encoded in the
workaround's direct dependencies if this makes otherwise reasonable
configuration choices impossible.

The workaround for erratum 720789 only affects a code path which is
not active in UP kernels; hence it should be safe to turn on in UP
kernels, without penalty.

This patch simply removes the extra dependency on SMP from Kconfig.

This means that configs for buggy silicon can simply select
ARM_ERRATA_720789, without preventing a UP kernel from being built
or duplicatiing knowledge about when to activate the workaround.

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
---
KernelVersion: v3.2-rc3
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Patch

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 44789ef..31bbad3 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1245,7 +1245,7 @@  config PL310_ERRATA_588369
 
 config ARM_ERRATA_720789
 	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
-	depends on CPU_V7 && SMP
+	depends on CPU_V7
 	help
 	  This option enables the workaround for the 720789 Cortex-A9 (prior to
 	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the