kbuild: make headerdep work in KBUILD_OUTDIR

This patch fixes the headerdep target so it works when make is invoked
in KBUILD_OUTDIR.

Signed-off-by: Peter Foley <pefoley2@verizon.net>
Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 2 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 02134de65acf..6b21de15c82e 100644
--- a/Makefile
+++ b/Makefile
@@ -991,7 +991,8 @@ include/generated/utsrelease.h: include/config/kernel.release FORCE
 
 PHONY += headerdep
 headerdep:
-        $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
+        $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
+        $(srctree)/scripts/headerdep.pl -I$(srctree)/include
 
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