kbuild: make -s should be used with kernelrelease/kernelversion/image_name

If .config has been edited, there will be a silentoldconfig run:

  $ make defconfig
  ...
  $ make kernelrelease
  scripts/kconfig/conf --silentoldconfig Kconfig
  3.16.0-rc1+

Recently, kbuild started to print the name of the build directory when
using O=

  $ make O=build kernelrelease
  make[1]: Entering directory `/dev/shm/mmarek/linux-2.6/build'
  3.16.0-rc1+

Since these targets are often used in scripts, add a hint to use make -s
to the help text.

Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/Makefile b/Makefile
index 97b2861..284071c 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1214,9 +1214,9 @@ help:
        @echo  '  tags/TAGS       - Generate tags file for editors'
        @echo  '  cscope          - Generate cscope index'
        @echo  '  gtags           - Generate GNU GLOBAL index'
-       @echo  '  kernelrelease   - Output the release version string'
-       @echo  '  kernelversion   - Output the version stored in Makefile'
-       @echo  '  image_name      - Output the image name'
+       @echo  '  kernelrelease   - Output the release version string (use with make -s)'
+       @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
+       @echo  '  image_name      - Output the image name (use with make -s)'
        @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
         echo  '                    (default: $(INSTALL_HDR_PATH))'; \
         echo  ''