kbuild: add headerdep used to detect inclusion cycles in header files

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 95160e5c70e8..e1c5ae8a8162 100644
--- a/Makefile
+++ b/Makefile
@@ -1026,6 +1026,10 @@ include/linux/version.h: $(srctree)/Makefile FORCE
 include/linux/utsrelease.h: include/config/kernel.release FORCE
         $(call filechk,utsrelease.h)
 
+PHONY += headerdep
+headerdep:
+        $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
+
 # ---------------------------------------------------------------------------
 
 PHONY += depend dep
@@ -1274,7 +1278,8 @@ help:
         @echo  '  versioncheck    - Sanity check on version.h usage'
         @echo  '  includecheck    - Check for duplicate included header files'
         @echo  '  export_report   - List the usages of all exported symbols'
-        @echo  '  headers_check   - Sanity check on exported headers'; \
+        @echo  '  headers_check   - Sanity check on exported headers'
+        @echo  '  headerdep       - Detect inclusion cycles in headers'; \
          echo  ''
         @echo  'Kernel packaging:'
         @$(MAKE) $(build)=$(package-dir) help