From: gfree.wind@foxmail.com
Date: Thu, 30 Mar 2017 06:49:19 +0800

From: Gao Feng <redacted>

1. Move the "window = tp->rcv_wnd;" into the condition block without
tp->rx_opt.rcv_wscale.
Because it is unnecessary when enable wscale;

2. Use the macro ALIGN instead of two statements.
The two statements are used to make window align to 1<<wscale.
Use the ALIGN is more clearer.

3. Use the rounddown to make codes clearer.

Signed-off-by: Gao Feng <redacted>

Applied, but please do not target non-netfilter patches using
"nf-next" in your Subject lines.