Messages in this thread | | | Date | Wed, 15 Apr 2020 13:20:19 +0000 | From | Luis Chamberlain <> | Subject | Re: [PATCH 5/5] block: revert back to synchronous request_queue removal |
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On Tue, Apr 14, 2020 at 11:46:44PM -0700, Christoph Hellwig wrote: > On Tue, Apr 14, 2020 at 08:58:52PM +0000, Luis Chamberlain wrote: > > > I think this needs a WARN_ON thrown in to enforece the calling context. > > > > I considered adding a might_sleep() but upon review with Bart, he noted > > that this function already has a mutex_lock(), and if you look under the > > hood of mutex_lock(), it has a might_sleep() at the very top. The > > warning then is implicit. > > It might just be a personal preference, but I think the documentation > value of a WARN_ON_ONCE or might_sleep with a comment at the top of > the function is much higher than a blurb in a long kerneldoc text and > a later mutex_lock.
Well I'm a fan of making this explicit, so sure will just sprinkle a might_sleep(), even though we have a mutex_lock().
Luis
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