What to do in response to a kernel warning

The kernel provides a number of macros internally to allow code to generate warnings when something goes wrong. It does not, however, provide a lot of guidance regarding what should happen when a warning is issued. Alexander Popov recently posted a patch series adding an option for the system's response to warnings; that series seems unlikely to be applied in anything close to its current form, but it did succeed in provoking a discussion on how warnings should be handled.

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