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LinuxKPI: add no_printk
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Authored by bz on Aug 27 2024, 9:16 PM.
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Summary

Add a version of no_printk(), which seems to be there to have format
string chekcing while never calling the printk. It seems a very weird
thing and it needs a return code and for some reason my initial
while (0) { } version hadn't worked while porting over new code but
could have been further downstream format string problems.
if (0) seems to do the job though I would have expected that to more
likely simply get optimised out without any futher format checking.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days

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rG FreeBSD src repository
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