[PATCH] printk: Fix alignment of buf causing crash on ARM EABI

[Kay Sievers]

On Tue, Jun 5, 2012 at 8:59 AM, Greg KH <gregkh at linuxfoundation.org> wrote:
> On Tue, Jun 05, 2012 at 08:52:34AM +0200, Andrew Lunn wrote:
>> Commit 7ff9554bb578ba02166071d2d487b7fc7d860d62, printk: convert
>> byte-buffer to variable-length record buffer, causes systems using
>> EABI to crash very early in the boot cycle. The first entry in struct
>> log is a u64, which for EABI must be 8 byte aligned.
>>
>> Make use of __alignof__() so the compiler to decide the alignment, but
>> allow it to be overridden using CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS,
>> for systems which can perform unaligned access and want to save
>> a few bytes of space.
>>
>> Tested on Orion5x and Kirkwood.
>>
>> Signed-off-by: Andrew Lunn <andrew at lunn.ch>
>> ---
>>  kernel/printk.c |    4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> Thanks, I think I have a patch in my to-apply queue that fixes this in a
> bit different way.  I'll dig that up and compare them in the next few
> days as I work my way through my pending patch queue.

This patch looks good to me.

Thanks,
Kay