From mboxrd@z Thu Jan 1 00:00:00 1970 From: nico@fluxnic.net (Nicolas Pitre) Date: Sat, 05 Nov 2011 11:59:46 -0400 (EDT) Subject: [PATCH] ARM: Allow kernel unaligned accesses on ARMv6+ processors In-Reply-To: <1320489687-9642-1-git-send-email-catalin.marinas@arm.com> References: <1320489687-9642-1-git-send-email-catalin.marinas@arm.com> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sat, 5 Nov 2011, Catalin Marinas wrote: > 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 > Cc: John Linn Acked-by: Nicolas Pitre > --- > arch/arm/kernel/head.S | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S > index a400a4d..1768db2 100644 > --- a/arch/arm/kernel/head.S > +++ b/arch/arm/kernel/head.S > @@ -394,7 +394,7 @@ __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 > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >