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References: <20240122013510.55788-1-cuiyunhui@bytedance.com> <20240122-boxcar-conical-c728a709aa5c@spud>
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From: yunhui cui <cuiyunhui@bytedance.com>
Date: Mon, 22 Jan 2024 16:32:15 +0800
Message-ID: <CAEEQ3wmX7_VP-YM9NkesAhd+5zetw79AW9bo0YO7KGAeJX4eRQ@mail.gmail.com>
Subject: Re: [External] Re: [PATCH] RISC-V: cacheinfo: add init_cache_level()
To: Conor Dooley <conor@kernel.org>
Cc: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, 
	conor.dooley@microchip.com, robh@kernel.org, sudeep.holla@arm.com, 
	pierre.gondois@arm.com, suagrfillet@gmail.com, 
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
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Hi Conor,

On Mon, Jan 22, 2024 at 4:09=E2=80=AFPM Conor Dooley <conor@kernel.org> wro=
te:
>
> On Mon, Jan 22, 2024 at 09:35:10AM +0800, Yunhui Cui wrote:
> > When cacheinfo_sysfs_init() is executed, the general weak function
> > init_cache_level() returns -ENOENT, causing failure to add the "cache"
> > node to /sys/devices/system/cpu/cpux/. Implement the init_cache_level()
> > function on RISC-V to fix it.
>
> If you recall correctly, I asked you to explain how to reproduce this
> when you sent the patch.

In fact, the reason has been explained in the commit log. As for how
to reproduce it, you can check whether there is a "cache" node in
/sys/devices/system/cpu/cpux/ on the riscv platform.

Thanks,
Yunhui