struct _ddebug_info already has most of dyndbg's info for a module; push debug_table.mod_name down into it, finishing the encapsulation.
This allows refactoring several callchains, passing &_ddebug_info instead of &ddebug_table, and hoisting the "&dt->info" deref up instead of repeating it thru the callchans ddebug_table contains a _ddebug_info member, so its users keep access to mod_name, just now with "->info." added in. In static ddebug_add_module(&di), reinforce the cursor-model by dropping the modname arg, and setting di->mod_name at each caller. Signed-off-by: Jim Cromie <[email protected]> Reviewed-by: Louis Chauvet <[email protected]> --- -v3 more s/dt/di/ internal interface changes -v5 convert class_in_range macro to function --- include/linux/dynamic_debug.h | 1 + lib/dynamic_debug.c | 50 ++++++++++++++++++----------------- 2 files changed, 27 insertions(+), 24 deletions(-) diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index 4775f66e96dd..10f1a2a1bee4 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -107,6 +107,7 @@ struct _ddebug_class_maps { }; struct _ddebug_info { + const char *mod_name; struct _ddebug_descs descs; struct _ddebug_class_maps maps; }; diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 49de591f036a..e7a6ce260c34 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -46,7 +46,6 @@ extern struct _ddebug_class_map __stop___dyndbg_class_maps[]; struct ddebug_table { struct list_head link; - const char *mod_name; struct _ddebug_info info; }; @@ -253,10 +252,11 @@ static int ddebug_change(const struct ddebug_query *query, /* search for matching ddebugs */ mutex_lock(&ddebug_lock); list_for_each_entry(dt, &ddebug_tables, link) { + struct _ddebug_info *di = &dt->info; /* match against the module name */ if (query->module && - !match_wildcard(query->module, dt->mod_name)) + !match_wildcard(query->module, di->mod_name)) continue; if (query->class_string) { @@ -268,8 +268,8 @@ static int ddebug_change(const struct ddebug_query *query, valid_class = _DPRINTK_CLASS_DFLT; } - for (i = 0; i < dt->info.descs.len; i++) { - struct _ddebug *dp = &dt->info.descs.start[i]; + for (i = 0; i < di->descs.len; i++) { + struct _ddebug *dp = &di->descs.start[i]; if (!ddebug_match_desc(query, dp, valid_class)) continue; @@ -289,7 +289,7 @@ static int ddebug_change(const struct ddebug_query *query, #endif v4pr_info("changed %s:%d [%s]%s %s => %s\n", trim_prefix(dp->filename), dp->lineno, - dt->mod_name, dp->function, + di->mod_name, dp->function, ddebug_describe_flags(dp->flags, &fbuf), ddebug_describe_flags(newflags, &nbuf)); dp->flags = newflags; @@ -1156,12 +1156,12 @@ static bool ddebug_class_in_range(const int class_id, const struct _ddebug_class class_id < map->base + map->length); } -static const char *ddebug_class_name(struct ddebug_table *dt, struct _ddebug *dp) +static const char *ddebug_class_name(struct _ddebug_info *di, struct _ddebug *dp) { struct _ddebug_class_map *map; int i; - for_subvec(i, map, &dt->info, maps) + for_subvec(i, map, di, maps) if (ddebug_class_in_range(dp->class_id, map)) return map->class_names[dp->class_id - map->base]; @@ -1189,13 +1189,13 @@ static int ddebug_proc_show(struct seq_file *m, void *p) seq_printf(m, "%s:%u [%s]%s =%s \"", trim_prefix(dp->filename), dp->lineno, - iter->table->mod_name, dp->function, + iter->table->info.mod_name, dp->function, ddebug_describe_flags(dp->flags, &flags)); seq_escape_str(m, dp->format, ESCAPE_SPACE, "\t\r\n\""); seq_putc(m, '"'); if (dp->class_id != _DPRINTK_CLASS_DFLT) { - class = ddebug_class_name(iter->table, dp); + class = ddebug_class_name(&iter->table->info, dp); if (class) seq_printf(m, " class:%s", class); else @@ -1247,7 +1247,7 @@ static const struct proc_ops proc_fops = { static void ddebug_attach_module_classes(struct ddebug_table *dt, struct _ddebug_info *di) { - vpr_info("module:%s attached %d classes\n", dt->mod_name, dt->info.maps.len); + vpr_info("module:%s attached %d classes\n", dt->info.mod_name, dt->info.maps.len); } /* @@ -1265,7 +1265,7 @@ static void ddebug_attach_module_classes(struct ddebug_table *dt, struct _ddebug typeof(_dst) __dst = (_dst); \ int __nc = 0; \ for_subvec(_i, _sp, _box, _vec) { \ - if (!strcmp((_sp)->mod_name, (_dst)->mod_name)) { \ + if (!strcmp((_sp)->mod_name, (__dst)->info.mod_name)) { \ if (!__nc++) \ (__dst)->info._vec.start = (_sp); \ } else { \ @@ -1280,7 +1280,7 @@ static void ddebug_attach_module_classes(struct ddebug_table *dt, struct _ddebug * Allocate a new ddebug_table for the given module * and add it to the global list. */ -static int ddebug_add_module(struct _ddebug_info *di, const char *modname) +static int ddebug_add_module(struct _ddebug_info *di) { struct ddebug_table *dt; struct _ddebug_class_map *cm; @@ -1289,20 +1289,19 @@ static int ddebug_add_module(struct _ddebug_info *di, const char *modname) if (!di->descs.len) return 0; - v3pr_info("add-module: %s %d sites\n", modname, di->descs.len); + v3pr_info("add-module: %s %d sites\n", di->mod_name, di->descs.len); dt = kzalloc(sizeof(*dt), GFP_KERNEL); if (dt == NULL) { - pr_err("error adding module: %s\n", modname); + pr_err("error adding module: %s\n", di->mod_name); return -ENOMEM; } /* - * For built-in modules, name lives in .rodata and is - * immortal. For loaded modules, name points at the name[] - * member of struct module, which lives at least as long as - * this struct ddebug_table. + * For built-in modules, name (as supplied in di by its + * callers) lives in .rodata and is immortal. For loaded + * modules, name points at the name[] member of struct module, + * which lives at least as long as this struct ddebug_table. */ - dt->mod_name = modname; dt->info = *di; INIT_LIST_HEAD(&dt->link); @@ -1316,7 +1315,7 @@ static int ddebug_add_module(struct _ddebug_info *di, const char *modname) list_add_tail(&dt->link, &ddebug_tables); mutex_unlock(&ddebug_lock); - vpr_info("%3u debug prints in module %s\n", di->descs.len, modname); + vpr_info("%3u debug prints in module %s\n", di->descs.len, di->mod_name); return 0; } @@ -1379,7 +1378,7 @@ static int ddebug_remove_module(const char *mod_name) mutex_lock(&ddebug_lock); list_for_each_entry_safe(dt, nextdt, &ddebug_tables, link) { - if (dt->mod_name == mod_name) { + if (dt->info.mod_name == mod_name) { ddebug_table_free(dt); ret = 0; break; @@ -1399,7 +1398,8 @@ static int ddebug_module_notify(struct notifier_block *self, unsigned long val, switch (val) { case MODULE_STATE_COMING: - ret = ddebug_add_module(&mod->dyndbg_info, mod->name); + mod->dyndbg_info.mod_name = mod->name; + ret = ddebug_add_module(&mod->dyndbg_info); if (ret) WARN(1, "Failed to allocate memory: dyndbg may not work properly.\n"); break; @@ -1497,7 +1497,8 @@ static int __init dynamic_debug_init(void) mod_ct++; di.descs.len = mod_sites; di.descs.start = iter_mod_start; - ret = ddebug_add_module(&di, modname); + di.mod_name = modname; + ret = ddebug_add_module(&di); if (ret) goto out_err; @@ -1508,7 +1509,8 @@ static int __init dynamic_debug_init(void) } di.descs.len = mod_sites; di.descs.start = iter_mod_start; - ret = ddebug_add_module(&di, modname); + di.mod_name = modname; + ret = ddebug_add_module(&di); if (ret) goto out_err; -- 2.51.1
