ARM: 6470/1: atomic64: use generic implementation for OABI configurations
authorWill Deacon <will.deacon@arm.com>
Thu, 4 Nov 2010 17:24:22 +0000 (18:24 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Sun, 7 Nov 2010 16:12:39 +0000 (16:12 +0000)
commitd4c7b1f9b41b76f6e794fdc4043f1903809e84d9
treed13ca032c0e28eba4b95c50040c5593d0a521513
parentc3b291d98878a5f25fee56255bcfa420e85dff59
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>
arch/arm/Kconfig