kbuild: mark help target as PHONY

Obviously, the "help" should be a PHONY target.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Michal Marek <mmarek@suse.com>

diff --git a/Makefile b/Makefile
index ec3dde3f6bb8d1efb7d99113fd8ad52562b186f0..e3af48068c6594f72e55ce0d126c78cc115232fa 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1300,6 +1300,7 @@ boards := $(sort $(notdir $(boards)))
 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
 board-dirs := $(sort $(notdir $(board-dirs:/=)))
 
+PHONY += help
 help:
        @echo  'Cleaning targets:'
        @echo  '  clean           - Remove most generated files but keep the config and'
@@ -1470,6 +1471,7 @@ $(clean-dirs):
 clean: rm-dirs := $(MODVERDIR)
 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
 
+PHONY += help
 help:
        @echo  '  Building external modules.'
        @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'