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

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Date:   Wed, 2 Nov 2022 13:53:18 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     chenlifu <chenlifu@...wei.com>,
        "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



Le 31/10/2022 à 01:45, chenlifu a écrit :
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> 
> 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(

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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