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authorWill Deacon <will.deacon@arm.com>2010-11-04 18:24:22 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-11-07 16:12:39 +0000
commitd4c7b1f9b41b76f6e794fdc4043f1903809e84d9 (patch)
treed13ca032c0e28eba4b95c50040c5593d0a521513 /arch/arm
parentc3b291d98878a5f25fee56255bcfa420e85dff59 (diff)
downloadop-kernel-dev-d4c7b1f9b41b76f6e794fdc4043f1903809e84d9.zip
op-kernel-dev-d4c7b1f9b41b76f6e794fdc4043f1903809e84d9.tar.gz
ARM: 6470/1: atomic64: use generic implementation for OABI configurations
The old apcs-gnu ABI doesn't guarantee that double words are allocated to registers with even alignment, causing the 64-bit exclusive memory operations to be rejected by the assembler. This patch requires that CONFIG_AEABI is set in order to use the native atomic operations and falls back to the generic (spinlock) code otherwise. Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a19a526..8ae3d48 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -6,7 +6,7 @@ config ARM
select HAVE_MEMBLOCK
select RTC_LIB
select SYS_SUPPORTS_APM_EMULATION
- select GENERIC_ATOMIC64 if (!CPU_32v6K)
+ select GENERIC_ATOMIC64 if (!CPU_32v6K || !AEABI)
select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
select HAVE_ARCH_KGDB
select HAVE_KPROBES if (!XIP_KERNEL)
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