On Mon, 19 Oct 2020 10:35:12 +0200 Udo van den Heuvel udovdh@xs4all.nl wrote:
People,
At https://www.kernel.org/doc/html/latest/leds/leds-class.html we can read that the LEDS code supposedly optimizes away when certain conditions are met. Especially the Realtek HDA driver *unconditionally* (as found in 5.9.1) *wants* to enable LED functionality. I.e.: if this blockade is lifted in the source tree then I can live with the 'is optimized out' predictions, assuming that gcc (from Fedora 32) can do this. So the request is clear; we're almost there. Please make it so that the compiler can do the 'optimize away' work bij changing a tad in the Realtek HDA driver, along the lines of the patch sent to me earlier or something even more beautiful.
Thanks in advance and kind regards, Udo
Udo,
The documentation says that LED trigger code optimises away, not LED core.
But yes, something similar could maybe be done for the whole LED class... (maybe!)
BTW, you are welcome to propose a patch as well, since it seems that nobody else is interested as much as you are in this :)
Marek