17 Oct
2025
17 Oct
'25
4:37 p.m.
On Fri, Oct 17, 2025 at 06:29:10PM +0200, Danilo Krummrich wrote:
I'm not sure about MISC device though. Unless there's a good reason, I think MISC device should be "fenced" instead.
misc is a very small wrapper around raw fops, and raw fops are optimized for performance. Adding locking that many important things like normal files don't need to all fops would not be agreed.
The sketch in this series where we have a core helper to provide a shim fops that adds on the lock is smart and I think could be an agreeable way to make a synchronous misc and cdev unregister for everyone to trivially use.
Jason