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67424f61f8
linux/scripts/kconfig
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Masahiro Yamada 67424f61f8 kconfig: do not write .config if the content is the same 
Kconfig updates the .config when it exits even if its content is
exactly the same as before. Since its timestamp becomes newer than
that of other build artifacts, additional processing is invoked,
which is annoying.

- syncconfig is invoked to update include/config/auto.conf, etc.

- kernel/configs.o is recompiled if CONFIG_IKCONFIG is enabled,
  then vmlinux is relinked as well.

If the .config is not changed at all, we do not have to even
touch it. Just bail out showing "No change to .config".

  $ make allmodconfig
  scripts/kconfig/conf  --allmodconfig Kconfig
  #
  # configuration written to .config
  #
  $ make allmodconfig
  scripts/kconfig/conf  --allmodconfig Kconfig
  #
  # No change to .config
  #

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-11 02:15:49 +09:00
..
lxdialog kconfig: remove trailing whitespaces 2019-05-09 22:37:17 +09:00
tests kconfig: convert to SPDX License Identifier 2018-12-28 22:22:28 +09:00
.gitignore kconfig: rename generated .*conf-cfg to *conf-cfg 2019-01-06 10:47:09 +09:00
conf.c kbuild: move ".config not found!" message from Kconfig to Makefile 2019-02-27 22:25:10 +09:00
confdata.c kconfig: do not write .config if the content is the same 2019-05-11 02:15:49 +09:00
expr.c kconfig: split some C files out of zconf.y 2018-12-28 22:22:38 +09:00
expr.h kconfig: rename zconf.y to parser.y 2019-02-13 23:25:58 +09:00
gconf-cfg.sh kconfig: do not require pkg-config on make {menu,n}config 2018-09-03 02:13:48 +09:00
gconf.c kconfig: remove trailing whitespaces 2019-05-09 22:37:17 +09:00
gconf.glade scripts/kconfig/gconf.glade Update broken web addresses. 2010-09-17 16:54:42 +02:00
images.c kconfig: split images.c out of qconf.cc/gconf.c to fix gconf warnings 2018-12-28 22:22:39 +09:00
images.h kconfig: split images.c out of qconf.cc/gconf.c to fix gconf warnings 2018-12-28 22:22:39 +09:00
lexer.l kconfig: rename zconf.y to parser.y 2019-02-13 23:25:58 +09:00
list.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lkc_proto.h kconfig: allow all config targets to write auto.conf if missing 2018-07-25 23:25:30 +09:00
lkc.h kconfig: rename zconf.l to lexer.l 2019-02-13 23:25:49 +09:00
Makefile kconfig: rename zconf.y to parser.y 2019-02-13 23:25:58 +09:00
mconf-cfg.sh kconfig: do not require pkg-config on make {menu,n}config 2018-09-03 02:13:48 +09:00
mconf.c kconfig: convert to SPDX License Identifier 2018-12-28 22:22:28 +09:00
menu.c kconfig: convert to SPDX License Identifier 2018-12-28 22:22:28 +09:00
merge_config.sh kconfig: convert to SPDX License Identifier 2018-12-28 22:22:28 +09:00
nconf-cfg.sh kconfig: Make nconf-cfg.sh executable 2019-04-09 22:44:57 +09:00
nconf.c kconfig/[mn]conf: handle backspace (^H) key 2019-03-29 22:48:01 +09:00
nconf.gui.c kconfig/[mn]conf: handle backspace (^H) key 2019-03-29 22:48:01 +09:00
nconf.h kconfig: convert to SPDX License Identifier 2018-12-28 22:22:28 +09:00
parser.y kconfig: rename zconf.y to parser.y 2019-02-13 23:25:58 +09:00
preprocess.c kconfig: split some C files out of zconf.y 2018-12-28 22:22:38 +09:00
qconf-cfg.sh kconfig: do not require pkg-config on make {menu,n}config 2018-09-03 02:13:48 +09:00
qconf.cc kconfig: fix 'Save As' menu of xconfig 2019-03-12 02:50:24 +09:00
qconf.h kconfig: fix 'Save As' menu of xconfig 2019-03-12 02:50:24 +09:00
streamline_config.pl kconfig: convert to SPDX License Identifier 2018-12-28 22:22:28 +09:00
symbol.c kconfig: split some C files out of zconf.y 2018-12-28 22:22:38 +09:00
util.c kconfig: convert to SPDX License Identifier 2018-12-28 22:22:28 +09:00