On Fri, May 10, 2019 at 03:12:05PM +0900, Masahiro Yamada wrote: > 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/config.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 > # > > Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> Reported-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> ? :) Anyway, nice change, looks good to me: Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
