From 89b9060987d988333de59dd218c9666bd7ee95a5 Mon Sep 17 00:00:00 2001 From: Tetsuo Handa Date: Tue, 17 Dec 2019 18:42:06 +0900 Subject: kconfig: Add yes2modconfig and mod2yesconfig targets. 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 Cc: Dmitry Vyukov Signed-off-by: Masahiro Yamada --- scripts/kconfig/Makefile | 4 +++- scripts/kconfig/conf.c | 16 ++++++++++++++++ scripts/kconfig/confdata.c | 16 ++++++++++++++++ scripts/kconfig/lkc.h | 3 +++ 4 files changed, 38 insertions(+), 1 deletion(-) (limited to 'scripts/kconfig') diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile index 953a2859302c..fbeb62ae3401 100644 --- a/scripts/kconfig/Makefile +++ b/scripts/kconfig/Makefile @@ -67,7 +67,7 @@ localyesconfig localmodconfig: $(obj)/conf # deprecated for external use simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \ alldefconfig randconfig listnewconfig olddefconfig syncconfig \ - helpnewconfig + helpnewconfig yes2modconfig mod2yesconfig PHONY += $(simple-targets) @@ -135,6 +135,8 @@ help: @echo ' allmodconfig - New config selecting modules when possible' @echo ' alldefconfig - New config with all symbols set to default' @echo ' randconfig - New config with random answer to all options' + @echo ' yes2modconfig - Change answers from yes to mod if possible' + @echo ' mod2yesconfig - Change answers from mod to yes if possible' @echo ' listnewconfig - List new options' @echo ' helpnewconfig - List new options and help text' @echo ' olddefconfig - Same as oldconfig but sets new symbols to their' diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c index 1f89bf1558ce..f6e548b8f795 100644 --- a/scripts/kconfig/conf.c +++ b/scripts/kconfig/conf.c @@ -34,6 +34,8 @@ enum input_mode { listnewconfig, helpnewconfig, olddefconfig, + yes2modconfig, + mod2yesconfig, }; static enum input_mode input_mode = oldaskconfig; @@ -467,6 +469,8 @@ static struct option long_opts[] = { {"listnewconfig", no_argument, NULL, listnewconfig}, {"helpnewconfig", no_argument, NULL, helpnewconfig}, {"olddefconfig", no_argument, NULL, olddefconfig}, + {"yes2modconfig", no_argument, NULL, yes2modconfig}, + {"mod2yesconfig", no_argument, NULL, mod2yesconfig}, {NULL, 0, NULL, 0} }; @@ -489,6 +493,8 @@ static void conf_usage(const char *progname) printf(" --allmodconfig New config where all options are answered with mod\n"); printf(" --alldefconfig New config with all symbols set to default\n"); printf(" --randconfig New config with random answer to all options\n"); + printf(" --yes2modconfig Change answers from yes to mod if possible\n"); + printf(" --mod2yesconfig Change answers from mod to yes if possible\n"); } int main(int ac, char **av) @@ -553,6 +559,8 @@ int main(int ac, char **av) case listnewconfig: case helpnewconfig: case olddefconfig: + case yes2modconfig: + case mod2yesconfig: break; case '?': conf_usage(progname); @@ -587,6 +595,8 @@ int main(int ac, char **av) case listnewconfig: case helpnewconfig: case olddefconfig: + case yes2modconfig: + case mod2yesconfig: conf_read(NULL); break; case allnoconfig: @@ -660,6 +670,12 @@ int main(int ac, char **av) break; case savedefconfig: break; + case yes2modconfig: + conf_rewrite_mod_or_yes(def_y2m); + break; + case mod2yesconfig: + conf_rewrite_mod_or_yes(def_m2y); + break; case oldaskconfig: rootEntry = &rootmenu; conf(&rootmenu); diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c index 3569d2dec37c..99f2418baa6c 100644 --- a/scripts/kconfig/confdata.c +++ b/scripts/kconfig/confdata.c @@ -1362,3 +1362,19 @@ bool conf_set_all_new_symbols(enum conf_def_mode mode) return has_changed; } + +void conf_rewrite_mod_or_yes(enum conf_def_mode mode) +{ + struct symbol *sym; + int i; + tristate old_val = (mode == def_y2m) ? yes : mod; + tristate new_val = (mode == def_y2m) ? mod : yes; + + for_all_symbols(i, sym) { + if (sym_get_type(sym) == S_TRISTATE && + sym->def[S_DEF_USER].tri == old_val) { + sym->def[S_DEF_USER].tri = new_val; + sym_add_change_count(1); + } + } +} diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h index 73d3f01f1736..d4ca8297364f 100644 --- a/scripts/kconfig/lkc.h +++ b/scripts/kconfig/lkc.h @@ -34,6 +34,8 @@ enum conf_def_mode { def_default, def_yes, def_mod, + def_y2m, + def_m2y, def_no, def_random }; @@ -52,6 +54,7 @@ const char *conf_get_configname(void); void sym_set_change_count(int count); void sym_add_change_count(int count); bool conf_set_all_new_symbols(enum conf_def_mode mode); +void conf_rewrite_mod_or_yes(enum conf_def_mode mode); void set_all_choice_values(struct symbol *csym); /* confdata.c and expr.c */ -- cgit v1.2.3