linux-kernel - Re: [PATCH 1/3] leds: trigger: legtrig-bpf: Add ledtrig-bpf module

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Message-ID: <a9662071-8050-46b7-8416-d440d45bbb52@lunn.ch>
Date: Sat, 23 Mar 2024 23:18:48 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Daniel Hodges <hodges.daniel.scott@...il.com>
Cc: ast@...nel.org, pavel@....cz, lee@...nel.org,
	linux-leds@...r.kernel.org, daniel@...earbox.net,
	bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] leds: trigger: legtrig-bpf: Add ledtrig-bpf module

On Fri, Mar 22, 2024 at 10:08:14AM -0400, Daniel Hodges wrote:
> This patch adds a led trigger that interfaces with the bpf subsystem. It
> allows for BPF programs to control LED activity through calling bpf
> kfuncs. This functionality is useful in giving users a physical
> indication that a BPF program has performed an operation such as
> handling a packet or probe point.

Don't you want a mechanism to say which LED it should blink? Say you
have a BPF IR receiver, a BPF kernel scheduler and a BPF firewall. All
sharing the same LED is probably not what you want. Each probably
wants its own LED.

      Andrew