Re: [PATCH] unicode diacritics support

[Andrew Morton <akpm@linux-foundation.org>]

On Wed, 8 Aug 2007 10:10:10 +0200
Samuel Thibault <samuel.thibault@ens-lyon.org> wrote:

> There have been issues with non-latin1 diacritics and unicode.
> http://bugzilla.kernel.org/show_bug.cgi?id=7746
> 
> Git 759448f459234bfcf34b82471f0dba77a9aca498 `Kernel utf-8 handling'
> partly resolved it by adding conversion between diacritics and
> unicode. The patch below goes further by just turning diacritics into
> unicode, hence providing better future support. The kbd support can be
> fetched from
> http://bugzilla.kernel.org/attachment.cgi?id=12313
> 
> This was tested in all of latin1, latin9, latin2 and unicode with french
> and czech dead keys.
> 
> --
> 
> Turn the kernel accent_table into unicode, and extend ioctls KDGKBDIACR
> and KDSKBDIACR into their equivalents KDGKBDIACRUC and KDSKBDIACR.
> 
> New function int conv_uni_to_8bit(u32 uni) for converting unicode into 8bit
> _input_.  No, we don't want to store the translation, as it is potentially
> sparse and large.

This changes the kernel ABI a bit.  The KDGKBDIACR ioctl (and friends)
now return different data.  What are the implications of this?