[v2] zlib: Fix big performance regression

[Tom Rini]

On Tue, 16 Jul 2024 08:35:46 -0600, Tom Rini wrote:

> Commit 340fdf1303dc ("zlib: Port fix for CVE-2016-9841 to U-Boot")
> brings a big performance regression in inflate_fast(), which leads
> to watchdog timer reset on powerpc 8xx.
> 
> It looks like that commit does more than what it describe, it
> especially removed an important optimisation that was doing copies
> using halfwords instead of bytes. That unexpected change multiplied
> by almost 4 the time spent in inflate_fast() and increased by 40%
> the overall time needed to uncompress linux kernel image.
> 
> [...]

Applied to u-boot/master, thanks!

-- 
Tom