linux-kernel - Re: [PATCH v2 -next] powerpc/powermac: Fix symbol not declared warnings

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Date:   Thu, 3 Nov 2022 15:08:14 +0800
From:   chenlifu <chenlifu@...wei.com>
To:     Christophe Leroy <christophe.leroy@...roup.eu>,
        "benh@...nel.crashing.org" <benh@...nel.crashing.org>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "npiggin@...il.com" <npiggin@...il.com>,
        "nick.child@....com" <nick.child@....com>,
        "zhengzucheng@...wei.com" <zhengzucheng@...wei.com>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "paulus@...ba.org" <paulus@...ba.org>,
        "rppt@...nel.org" <rppt@...nel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "oohall@...il.com" <oohall@...il.com>
Subject: Re: [PATCH v2 -next] powerpc/powermac: Fix symbol not declared
 warnings

在 2022/11/2 21:53, Christophe Leroy 写道:
> 
> 
> Le 31/10/2022 à 01:45, chenlifu a écrit :
>> [Vous ne recevez pas souvent de courriers de chenlifu@...wei.com.
>> Découvrez pourquoi ceci est important à
>> https://aka.ms/LearnAboutSenderIdentification ]
>>
>> 在 2022/8/19 21:06, Chen Lifu 写道:
>>> 1. ppc_override_l2cr and ppc_override_l2cr_value are only used in
>>>      l2cr_init() function, remove them and used *l2cr directly.
>>> 2. has_l2cache is not used outside of the file, so mark it static and
>>>      do not initialise statics to 0.
>>>
>>> Fixes the following warning:
>>>
>>> arch/powerpc/platforms/powermac/setup.c:74:5: warning: symbol
>>> 'ppc_override_l2cr' was not declared. Should it be static?
>>> arch/powerpc/platforms/powermac/setup.c:75:5: warning: symbol
>>> 'ppc_override_l2cr_value' was not declared. Should it be static?
>>> arch/powerpc/platforms/powermac/setup.c:76:5: warning: symbol
>>> 'has_l2cache' was not declared. Should it be static?
>>>
>>> Signed-off-by: Chen Lifu <chenlifu@...wei.com>
> 
> You could have replaced printk(KERN_INFO by pr_info(

Thanks, I have replaced printk(KERN_INFO by pr_info( in PATCH v3.

> 
> Otherwise
> 
> Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>
> 
>>> ---
>>>    arch/powerpc/platforms/powermac/setup.c | 19 ++++++-------------
>>>    1 file changed, 6 insertions(+), 13 deletions(-)
>>>
>>> diff --git a/arch/powerpc/platforms/powermac/setup.c
>>> b/arch/powerpc/platforms/powermac/setup.c
>>> index 04daa7f0a03c..49faa066b372 100644
>>> --- a/arch/powerpc/platforms/powermac/setup.c
>>> +++ b/arch/powerpc/platforms/powermac/setup.c
>>> @@ -68,13 +68,11 @@
>>>
>>>    #include "pmac.h"
>>>
>>>    #undef SHOW_GATWICK_IRQS
>>>
>>> -int ppc_override_l2cr = 0;
>>> -int ppc_override_l2cr_value;
>>> -int has_l2cache = 0;
>>> +static int has_l2cache;
>>>
>>>    int pmac_newworld;
>>>
>>>    static int current_root_goodness = -1;
>>>
>>> @@ -234,26 +232,21 @@ static void __init l2cr_init(void)
>>>
>>>                for_each_of_cpu_node(np) {
>>>                        const unsigned int *l2cr =
>>>                                of_get_property(np, "l2cr-value", NULL);
>>>                        if (l2cr) {
>>> -                             ppc_override_l2cr = 1;
>>> -                             ppc_override_l2cr_value = *l2cr;
>>>                                _set_L2CR(0);
>>> -                             _set_L2CR(ppc_override_l2cr_value);
>>> +                             _set_L2CR(*l2cr);
>>> +                             printk(KERN_INFO "L2CR overridden (0x%x), "
>>> +                                    "backside cache is %s\n",
>>> +                                    *l2cr, ((*l2cr) & 0x80000000) ?
>>> +                                    "enabled" : "disabled");
>>>                        }
>>>                        of_node_put(np);
>>>                        break;
>>>                }
>>>        }
>>> -
>>> -     if (ppc_override_l2cr)
>>> -             printk(KERN_INFO "L2CR overridden (0x%x), "
>>> -                    "backside cache is %s\n",
>>> -                    ppc_override_l2cr_value,
>>> -                    (ppc_override_l2cr_value & 0x80000000)
>>> -                             ? "enabled" : "disabled");
>>>    }
>>>    #endif
>>>
>>>    static void __init pmac_setup_arch(void)
>>>    {
>>
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