ftrace/module: Move ftrace_release_mod() to ddebug_cleanup label
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Web: https://git.kernel.org/torvalds/c/1323eac7fd6560c809aa0ea6081904a5dfa581a9 Commit: 1323eac7fd6560c809aa0ea6081904a5dfa581a9 Parent: ed875ea1fcc6c34ea232610c3041d0978e327bbe Refname: refs/heads/master Author: Namit Gupta <[email protected]> AuthorDate: Mon Jan 8 10:41:21 2018 +0530 Committer: Jessica Yu <[email protected]> CommitDate: Mon Jan 15 20:44:21 2018 +0100 ftrace/module: Move ftrace_release_mod() to ddebug_cleanup label ftrace_module_init happen after dynamic_debug_setup, it is desired that cleanup should be called after this label however in current implementation it is called in free module label,ie:even though ftrace in not initialized, from so many fail case ftrace_release_mod() will be called and unnecessary traverse the whole list. In below patch we moved ftrace_release_mod() from free_module label to ddebug_cleanup label. that is the best possible location, other solution is to make new label to ftrace_release_mod() but since ftrace_module_init() is not return with minimum changes it should be in ddebug_cleanup label. Signed-off-by: Namit Gupta <[email protected]> Reviewed-by: Steven Rostedt (VMware) <[email protected]> Signed-off-by: Jessica Yu <[email protected]> --- kernel/module.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/kernel/module.c b/kernel/module.c index dea01ac9cb74..10c3c03091d9 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -3789,6 +3789,7 @@ static int load_module(struct load_info *info, const char __user *uargs, module_disable_nx(mod); ddebug_cleanup: + ftrace_release_mod(mod); dynamic_debug_remove(mod, info->debug); synchronize_sched(); kfree(mod->args); @@ -3808,12 +3809,6 @@ static int load_module(struct load_info *info, const char __user *uargs, synchronize_sched(); mutex_unlock(&module_mutex); free_module: - /* - * Ftrace needs to clean up what it initialized. - * This does nothing if ftrace_module_init() wasn't called, - * but it must be called outside of module_mutex. - */ - ftrace_release_mod(mod); /* Free lock-classes; relies on the preceding sync_rcu() */ lockdep_free_key_range(mod->core_layout.base, mod->core_layout.size); -- To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html