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ARM: 7150/1: Allow kernel unaligned accesses on ARMv6+ processors

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commit 8428e84d42 upstream.

Recent gcc versions generate unaligned accesses by default on ARMv6 and
later processors. This patch ensures that the SCTLR.A bit is always
cleared on such processors to avoid kernel traping before
alignment_init() is called.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: John Linn <John.Linn@xilinx.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Catalin Marinas
2011-11-07 18:05:53 +01:00
committed by Greg Kroah-Hartman
parent 57a3b9c22b
commit 92fd7a8988
1 changed files with 1 additions and 1 deletions
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2
arch/arm/kernel/head.S
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@@ -356,7 +356,7 @@ __secondary_data:
* r13 = *virtual* address to jump to upon completion
*/
__enable_mmu:
#ifdef CONFIG_ALIGNMENT_TRAP
#if defined(CONFIG_ALIGNMENT_TRAP) && __LINUX_ARM_ARCH__ < 6
orr r0, r0, #CR_A
#else
bic r0, r0, #CR_A