linux-kernel - Re: [PATCH 11/21] drivers: base: Print a warning instead of panic() when register

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Message-ID: <20231130165313.00001840@Huawei.com>
Date:   Thu, 30 Nov 2023 16:53:13 +0000
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Russell King <rmk+kernel@...linux.org.uk>
CC:     <linux-pm@...r.kernel.org>, <loongarch@...ts.linux.dev>,
        <linux-acpi@...r.kernel.org>, <linux-arch@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-riscv@...ts.infradead.org>, <kvmarm@...ts.linux.dev>,
        <x86@...nel.org>, <linux-csky@...r.kernel.org>,
        <linux-doc@...r.kernel.org>, <linux-ia64@...r.kernel.org>,
        <linux-parisc@...r.kernel.org>,
        Salil Mehta <salil.mehta@...wei.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        <jianyong.wu@....com>, <justin.he@....com>,
        James Morse <james.morse@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        "Palmer Dabbelt" <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>
Subject: Re: [PATCH 11/21] drivers: base: Print a warning instead of panic()
 when register_cpu() fails

On Tue, 21 Nov 2023 13:44:46 +0000
Russell King <rmk+kernel@...linux.org.uk> wrote:

> From: James Morse <james.morse@....com>
> 
> loongarch, mips, parisc, riscv and sh all print a warning if
> register_cpu() returns an error. Architectures that use
> GENERIC_CPU_DEVICES call panic() instead.
> 
> Errors in this path indicate something is wrong with the firmware
> description of the platform, but the kernel is able to keep running.
> 
> Downgrade this to a warning to make it easier to debug this issue.
> 
> This will allow architectures that switching over to GENERIC_CPU_DEVICES
> to drop their warning, but keep the existing behaviour.
> 
> Signed-off-by: James Morse <james.morse@....com>
> Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> Reviewed-by: Shaoqin Huang <shahuang@...hat.com>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>