On Sat, 2018-09-08 at 22:12 +0800, zhong jiang wrote: > kfree has taken the null pointer into account. Just remove the > redundant condition check before kfree. I'm all for doing that if it actually removes conditionals, but > - if (!IS_ERR_OR_NULL(regdb)) > + if (!IS_ERR(regdb)) > kfree(regdb); this seems rather pointless since there's still a condition. In that case, I feel it's easier to understand the original code. johannes