diff options
| author | Nicolas Pitre | 2005-06-08 19:00:47 +0100 |
|---|---|---|
| committer | Russell King | 2005-06-08 19:00:47 +0100 |
| commit | dcef1f634657dabe7905af3ccda12cf7f0b6fcc1 (patch) | |
| tree | e1b8bf471c3c268d0be919561268c24f298d031b /arch/arm/mm | |
| parent | aeabbbbe126f3d5e61e2db07629443cd10932bb2 (diff) | |
[PATCH] ARM: 2664/2: add support for atomic ops on pre-ARMv6 SMP systems
Patch from Nicolas Pitre
Not that there might be many of them on the planet, but at least RMK
apparently has one.
Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index ade0e2222f59..3fefb43c67f7 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -422,3 +422,11 @@ config HAS_TLS_REG assume directly accessing that register and always obtain the expected value only on ARMv7 and above. +config NEEDS_SYSCALL_FOR_CMPXCHG + bool + default y if SMP && (CPU_32v5 || CPU_32v4 || CPU_32v3) + help + SMP on a pre-ARMv6 processor? Well OK then. + Forget about fast user space cmpxchg support. + It is just not possible. + |