Thread (16 messages) 16 messages, 7 authors, 2026-03-18

Re: [PATCH] device property: Make modifications of fwnode "flags" thread safe

From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: 2026-03-17 07:27:05
Also in: driver-core, imx, linux-acpi, linux-arm-kernel, linux-devicetree, linux-i2c, linux-spi, lkml, stable

Hi Doug,

thanks for tackling this issue! I agree it should be fixed, just
wondered about one thing:
While flags are often modified while under the "fwnode_link_lock",
this is not universally true.
Is it a possibility to use the lock in all code paths instead?
Because...
 	struct list_head consumers;
-	u8 flags;
+	unsigned long flags;
... this change costs some memory on every system. Maybe it can be
avoided?

Happy hacking,

   Wolfram
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