From 1551df35f296f0a8df32f4f2054254f46e8be252 Mon Sep 17 00:00:00 2001 From: Tom Rini Date: Tue, 25 Feb 2014 10:27:01 -0500 Subject: arm: Switch to -mno-unaligned-access when supported by the compiler When we tell the compiler to optimize for ARMv7 (and ARMv6 for that matter) it assumes a default of SCTRL.A being cleared and unaligned accesses being allowed and fast at the hardware level. We set this bit and must pass along -mno-unaligned-access so that the compiler will still breakdown accesses and not trigger a data abort. To better help understand the requirements of the project with respect to unaligned memory access, the Documentation/unaligned-memory-access.txt file has been added as doc/README.unaligned-memory-access.txt and is taken from the v3.14-rc1 tag of the kernel. Cc: Albert ARIBAUD Cc: Mans Rullgard Signed-off-by: Tom Rini --- arch/arm/lib/interrupts.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/lib') diff --git a/arch/arm/lib/interrupts.c b/arch/arm/lib/interrupts.c index 603bf14627..758b01371e 100644 --- a/arch/arm/lib/interrupts.c +++ b/arch/arm/lib/interrupts.c @@ -153,7 +153,7 @@ void do_prefetch_abort (struct pt_regs *pt_regs) void do_data_abort (struct pt_regs *pt_regs) { - printf ("data abort\n\n MAYBE you should read doc/README.arm-unaligned-accesses\n\n"); + printf ("data abort\n"); show_regs (pt_regs); bad_mode (); } -- cgit