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On Fri, 25/1/19, Masahiro Yamada [off-list ref] wrote:
 

Currently, the Kbuild core manipulates header
search paths in a crazy
way [1].

To fix this mess, I want all Makefiles
to add explicit $(srctree)/ to
the search paths in the srctree. Some
Makefiles are already written in
that way, but not all. The goal of this
work is to make the notation
consistent, and finally get rid of the
gross hacks.

Having whitespaces after -I does not
matter since commit 48f6e3cf5bc6
("kbuild: do not drop -I without
parameter").

I also removed one header search path
in:

drivers/net/wireless/broadcom/brcm80211/brcmutil/Makefile

I was able to compile without it.

[1]: https://patchwork.kernel.org/patch/9632347/

Signed-off-by: Masahiro Yamada <redacted>

Acked-by: Hin-Tak Leung <redacted>

Looks okay for the rtl818x parts.