[PATCH] coresight: etb10: restore atomic_t for shared reading state

[Suzuki K Poulose]

On Fri, 29 May 2026 00:52:01 +0800, Runyu Xiao wrote:
> The etb10 miscdevice uses drvdata->reading as a shared exclusivity gate
> for userspace buffer access. etb_open() claims that gate with
> local_cmpxchg(), and etb_release() clears it with local_set().
> 
> That gate is shared per-device state rather than CPU-local state. A
> running system can reach it whenever /dev/<etb> is opened, closed, and
> reopened by different tasks while the device remains registered, so the
> same drvdata->reading variable may be claimed on one CPU and later
> cleared on another.
> 
> [...]

Applied, thanks!

[1/1] coresight: etb10: restore atomic_t for shared reading state
      https://git.kernel.org/coresight/c/fa09f08ede3d

Best regards,
-- 
Suzuki K Poulose <suzuki.poulose at arm.com>