On Tue, Dec 17, 2019 at 6:42 PM Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> wrote: > > Since kernel configs provided by syzbot are close to "make allyesconfig", > it takes long time to rebuild. This is especially waste of time when we > need to rebuild for many times (e.g. doing manual printk() inspection, > bisect operations). > > We can save time if we can exclude modules which are irrelevant to each > problem. But "make localmodconfig" cannot exclude modules which are built > into vmlinux because /sbin/lsmod output is used as the source of modules. > > Therefore, this patch adds "make yes2modconfig" which converts from =y > to =m if possible. After confirming that the interested problem is still > reproducible, we can try "make localmodconfig" (and/or manually tune > based on "Modules linked in:" line) in order to exclude modules which are > irrelevant to the interested problem. While we are at it, this patch also > adds "make mod2yesconfig" which converts from =m to =y in case someone > wants to convert from =m to =y after "make localmodconfig". > > Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> > Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> > --- > Changelog since v2: > - Add 'if possible' to help message. > - Make conf_rewrite_mod_or_yes() void. > - Don't call check_conf() loop, for conf_write() takes care. > - Use sym_add_change_count(1) to tell something has changed. > > Changelog since v1: > - Updated the available 'help' targets in Makefile. Applied to linux-kbuild. Thanks. -- Best Regards Masahiro Yamada
