On Mon, Apr 13, 2015 at 09:03:39AM +0800, Jin, Yao wrote: > The NULL check here is to proivde the protection for current code and > future potential code. It's possible that in future some code may > change the pointer ipc->msg and the author may miss the kfree here.
That's not the point - the point is that if it's ever valid to call kfree() then passing a null pointer in is fine.
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