diff options
Diffstat (limited to 'kernel/trace/ftrace.c')
| -rw-r--r-- | kernel/trace/ftrace.c | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 4203fad56b6c..a69067367c29 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1042,10 +1042,6 @@ static struct ftrace_ops *removed_ops; */ static bool update_all_ops; -#ifndef CONFIG_FTRACE_MCOUNT_RECORD -# error Dynamic ftrace depends on MCOUNT_RECORD -#endif - struct ftrace_func_probe { struct ftrace_probe_ops *probe_ops; struct ftrace_ops ops; @@ -4665,13 +4661,17 @@ ftrace_regex_open(struct ftrace_ops *ops, int flag, } else { iter->hash = alloc_and_copy_ftrace_hash(size_bits, hash); } + } else { + if (hash) + iter->hash = alloc_and_copy_ftrace_hash(hash->size_bits, hash); + else + iter->hash = EMPTY_HASH; + } - if (!iter->hash) { - trace_parser_put(&iter->parser); - goto out_unlock; - } - } else - iter->hash = hash; + if (!iter->hash) { + trace_parser_put(&iter->parser); + goto out_unlock; + } ret = 0; @@ -6547,9 +6547,6 @@ int ftrace_regex_release(struct inode *inode, struct file *file) ftrace_hash_move_and_update_ops(iter->ops, orig_hash, iter->hash, filter_hash); mutex_unlock(&ftrace_lock); - } else { - /* For read only, the hash is the ops hash */ - iter->hash = NULL; } mutex_unlock(&iter->ops->func_hash->regex_lock); |