[PATCH v2 3/5] ARM: use generic unaligned.h

On Mon, Oct 08, 2012 at 03:34:57PM -0500, Rob Herring wrote:

On 10/08/2012 11:43 AM, Shawn Guo wrote:

quoted

This patch has been merged into mainline as commit below.

 d25c881 ARM: 7493/1: use generic unaligned.h

It introduces a regression for me.  Check out the commit on mainline,
build a v7 only kernel (imx5/6) with imx_v6_v7_defconfig, the kernel
halts in decompressor.  But v6/v7 kernel (imx3/5/6) works fine.  The
kernel built on the parent commit below works all fine.

It actually fails in the decompressor or that's the last output you get?

I think it fails in the decompressor, because what I see is 

Uncompressing Linux...

not

Uncompressing Linux... done, booting the kernel.

I compared the decompressor disassembly of both cases and get the same
number of ldrb/strb instructions, so I don't think it is directly
related to alignment.

I tried the XY decompressor as that is one difference, but that works
fine for me on highbank.

Does it work with an empty uncompress.h functions? That should be the
only difference in our decompressor code.

No, empty putc() in uncompress.h does not help.

New finding is that it only fails with LZO decompressor while the other
3 Gzip, LZMA and XZ all work good.  We happen to have LZO as the default
one in imx_v6_v7_defconfig.

Shawn