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-rw-r--r--arch/arm/mm/Kconfig21
1 files changed, 10 insertions, 11 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 07646d2..48bac7d 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -412,21 +412,20 @@ config CPU_BPREDICT_DISABLE
config TLS_REG_EMUL
bool
- default y if (SMP || CPU_32v6) && (CPU_32v5 || CPU_32v4 || CPU_32v3)
+ default y if SMP && (CPU_32v5 || CPU_32v4 || CPU_32v3)
help
- We might be running on an ARMv6+ processor which should have the TLS
- register but for some reason we can't use it, or maybe an SMP system
- using a pre-ARMv6 processor (there are apparently a few prototypes
- like that in existence) and therefore access to that register must
- be emulated.
+ An SMP system using a pre-ARMv6 processor (there are apparently
+ a few prototypes like that in existence) and therefore access to
+ that required register must be emulated.
config HAS_TLS_REG
bool
- depends on CPU_32v6
- default y if !TLS_REG_EMUL
+ depends on !TLS_REG_EMUL
+ default y if SMP || CPU_32v7
help
This selects support for the CP15 thread register.
- It is defined to be available on ARMv6 or later. If a particular
- ARMv6 or later CPU doesn't support it then it must include "select
- TLS_REG_EMUL" along with its other characteristics.
+ It is defined to be available on some ARMv6 processors (including
+ all SMP capable ARMv6's) or later processors. User space may
+ assume directly accessing that register and always obtain the
+ expected value only on ARMv7 and above.
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