From: Will Deacon <will.deacon@arm.com>
Date: Thu, 4 Nov 2010 17:24:22 +0000 (+0100)
Subject: ARM: 6470/1: atomic64: use generic implementation for OABI configurations
X-Git-Tag: v2.6.37-rc2~27^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d4c7b1f9b41b76f6e794fdc4043f1903809e84d9;p=pandora-kernel.git

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>
---

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