Re: [PATCH] regmap: maple: Drop the RCU read lock while syncing registers

From: Mark Brown
Date: Wed May 24 2023 - 07:58:47 EST

On Tue, 23 May 2023 23:18:19 +0100, Mark Brown wrote:
> Unfortunately the maple tree requires us to explicitly lock it so we need
> to take the RCU read lock while iterating. When syncing this means that we
> end up trying to write out register values while holding the RCU read lock
> which triggers lockdep issues since that is an atomic context but most
> buses can't be used in atomic context. Pause the iteration and drop the
> lock for each register we check to avoid this.
> [...]

Applied to for-next


[1/1] regmap: maple: Drop the RCU read lock while syncing registers
commit: 0cc6578048e0980d254aee345130cced4912f723

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

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