[PATCH] libfdt: Fix signedness comparison warnings

[Tom Rini]

On Fri, Oct 16, 2020 at 03:42:50PM +0100, Andre Przywara wrote:
> This is a combination of upstream libfdt commits to fix warnings about

> comparing signed and unsigned integers:
> ==========
> scripts/dtc/libfdt/fdt.c: In function ‘fdt_offset_ptr’:
> scripts/dtc/libfdt/fdt.c:137:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
>    if ((absoffset < offset)
> ...
> ==========
> 
> For a detailed description of the fixes, see the dtc repo:
> https://git.kernel.org/pub/scm/utils/dtc/dtc.git/log/?id=73e0f143b73d808
> 
> For this patch the commits between 73e0f143b73d8088 and ca19c3db2bf62000
> have been combined and adjusted for the slight differences in U-Boot's
> libfdt code base.
> 
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>

So, I've applied this to u-boot/master now.  These warnings do show up
with gcc-10 and it's worthwhile to silence them.  I'm working with
upstream dtc now so that when we resync next we'll be able to avoid the
size and performance penalties of making all fdt loads unaligned safe.
A further resync will also require us to fixup a number of dts warnings
again.  These are the main reasons that I'm setting aside my suggestion
of a full resync for now.  Thanks!

-- 
Tom
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