On Mon, 9 Oct 2017 09:33:50 -0600 Jonathan Corbet <cor...@lwn.net> wrote:
> > will prevent the callback from being called again. But this wrapper > > adds some overhead, and if the callback is safe from recursion, > > it can set this flag to disable the ftrace protection. > > What happens if you mark a function safe and it recurses anyway? Say, if > somebody else has hooked a different function unknown to the current > caller? Oh, if another callback is attached to a function that gets called within this function, that is fine. In fact I do that all the time. The problem is if the callback gets called again and then goes into a recursive loop. -- Steve
