linux-kernel - Re: [PATCH] asm-generic/io.h: Skip trace helpers if rwmmio events are disabled

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Message-Id: <d2514e7b-be87-4c77-9096-7285f2b715a0@app.fastmail.com>
Date: Wed, 24 Sep 2025 16:25:36 +0200
From: "Arnd Bergmann" <arnd@...db.de>
To: "Varad Gautam" <varadgautam@...gle.com>
Cc: Linux-Arch <linux-arch@...r.kernel.org>,
 "Sai Prakash Ranjan" <quic_saipraka@...cinc.com>,
 linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] asm-generic/io.h: Skip trace helpers if rwmmio events are disabled

On Tue, Sep 23, 2025, at 13:07, Varad Gautam wrote:
>
> Can I follow this along somewhere? (I don't see it on arnd/asm-generic.git atm.)
>
> The unnecessary log_*_mmio() calls are showing up on enough Pixel devices
> as a CPU cycles wastage, and I'm sure other Androids see it too.

Pushed out now. I still had it in my local branch, but did not
have any other asm-generic changes, so I ended up missing it again...

     Arnd