Messages in this thread | | | Date | Thu, 27 Aug 2020 10:55:20 +0200 | From | Christoph Hellwig <> | Subject | Re: [PATCH 01/19] char_dev: replace cdev_map with an xarray |
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On Thu, Aug 27, 2020 at 09:25:07AM +0200, Hannes Reinecke wrote: > Do you really need the mutex? > Wouldn't xa_store_range() be better and avoid the mutex?
We need the mutex as we need to grab the kobject reference under it.
xa_store_range is only available with a separate config option, and has really strange calling conventions. So I'd rather not pull it in here, especially as most cdev_add callers are for a single minor only anyway.
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