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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>
Will Deacon 14 years ago
parent
c3b291d988
commit
d4c7b1f9b4
1 changed files with 1 additions and 1 deletions
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  1. 1 1
      arch/arm/Kconfig

+ 1 - 1
arch/arm/Kconfig
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@@ -6,7 +6,7 @@ config ARM
 
 	select HAVE_MEMBLOCK
 
 	select HAVE_MEMBLOCK
 
 	select RTC_LIB
 
 	select RTC_LIB
 
 	select SYS_SUPPORTS_APM_EMULATION
 
 	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_OPROFILE if (HAVE_PERF_EVENTS)
 
 	select HAVE_ARCH_KGDB
 
 	select HAVE_ARCH_KGDB
 
 	select HAVE_KPROBES if (!XIP_KERNEL)
 
 	select HAVE_KPROBES if (!XIP_KERNEL)