On 2/8/25 3:31 PM, Markus Elfring wrote:

…

quoted

+++ b/drivers/firmware/samsung/exynos-acpm.c

@@ -0,0 +1,771 @@

…

quoted

+static int acpm_dequeue_by_polling(struct acpm_chan *achan,
+				   const struct acpm_xfer *xfer)
+{

…

quoted

+	do {
+		mutex_lock(&achan->rx_lock);
+		ret = acpm_get_rx(achan, xfer);
+		mutex_unlock(&achan->rx_lock);

…

Under which circumstances would you become interested to apply a statement
like “guard(mutex)(&achan->rx_lock);”?
https://elixir.bootlin.com/linux/v6.13.1/source/include/linux/mutex.h#L201

I'll replace the open-coded mutex handling with cleanup.h guard(mutex)
and scoped_guard(mutex, ...), thanks.

Cheers,
ta