Messages in this thread Patch in this message | | | Date | Tue, 22 Nov 2011 16:25:08 -0800 | From | Greg KH <> | Subject | [08/53] ARM: 7150/1: Allow kernel unaligned accesses on ARMv6+ |
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3.1-stable review patch. If anyone has any objections, please let me know.
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From: Catalin Marinas <catalin.marinas@arm.com>
commit 8428e84d42179c2a00f5f6450866e70d802d1d05 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>
--- arch/arm/kernel/head.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -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
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