netdev - [PATCH v2 02/11] Kbuild: avoid duplicate include path

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Date:	Wed, 15 Jun 2016 17:45:44 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Michal Marek <mmarek@...e.com>
Cc:	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v2 02/11] Kbuild: avoid duplicate include path

arch/$(hdr-arch)/include/generated/uapi is included twice in the
header search path, which is unnecessary, so this changes the
top-level Makefile to drop the second instance by filtering out
everything from USERINCLUDE that was already part of LINUXINCLUDE.

This should have very little effect other than making the 'make V=1'
output slightly smaller and making the build time faster by a miniscule
amount, but it seems to be cleaner.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 8b80a1506be0..45159861e645 100644
--- a/Makefile
+++ b/Makefile
@@ -389,8 +389,9 @@ LINUXINCLUDE    := \
 		-Iarch/$(hdr-arch)/include/generated/uapi \
 		-Iarch/$(hdr-arch)/include/generated \
 		$(if $(KBUILD_SRC), -I$(srctree)/include) \
-		-Iinclude \
-		$(USERINCLUDE)
+		-Iinclude
+
+LINUXINCLUDE	+= $(filter-out $(LINUXINCLUDE),$(USERINCLUDE))

 KBUILD_CPPFLAGS := -D__KERNEL__

-- 
2.9.0