linux-kernel - Re: [PATCH 2/2] powerpc: Use ARRAY_SIZE to replace its implementation

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Date:   Tue, 14 Aug 2018 18:28:43 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     Michael Ellerman <mpe@...erman.id.au>
CC:     <tony.luck@...el.com>, <fenghua.yu@...el.com>,
        <benh@...nel.crashing.org>, <paulus@...ba.org>, <oleg@...hat.com>,
        <rppt@...ux.vnet.ibm.com>, <dhowells@...hat.com>,
        <akpm@...ux-foundation.org>, <viro@...iv.linux.org.uk>,
        <linux-ia64@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH 2/2] powerpc: Use ARRAY_SIZE to replace its implementation

On 2018/8/14 17:28, Michael Ellerman wrote:
> zhong jiang <zhongjiang@...wei.com> writes:
>> Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element.
>> So just replace it.
>>
>> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
>> ---
>>  arch/powerpc/xmon/ppc-opc.c | 12 ++++--------
>>  1 file changed, 4 insertions(+), 8 deletions(-)
> This code is copied from binutils and we don't want to needlessly cause
> it to diverge from the binutils copy.
>
> So thanks but no thanks.
Thank you for clarification.

Sincerely
zhong jiang
> cheers
>
>> diff --git a/arch/powerpc/xmon/ppc-opc.c b/arch/powerpc/xmon/ppc-opc.c
>> index ac2b55b..f3f57a1 100644
>> --- a/arch/powerpc/xmon/ppc-opc.c
>> +++ b/arch/powerpc/xmon/ppc-opc.c
>> @@ -966,8 +966,7 @@
>>    { 0xff, 11, NULL, NULL, PPC_OPERAND_SIGNOPT },
>>  };
>>  
>> -const unsigned int num_powerpc_operands = (sizeof (powerpc_operands)
>> -					   / sizeof (powerpc_operands[0]));
>> +const unsigned int num_powerpc_operands = ARRAY_SIZE(powerpc_operands);
>>  
>>  /* The functions used to insert and extract complicated operands.  */
>>  
>> @@ -6980,8 +6979,7 @@
>>  {"fcfidu.",	XRC(63,974,1),	XRA_MASK, POWER7|PPCA2,	PPCVLE,		{FRT, FRB}},
>>  };
>>  
>> -const int powerpc_num_opcodes =
>> -  sizeof (powerpc_opcodes) / sizeof (powerpc_opcodes[0]);
>> +const int powerpc_num_opcodes = ARRAY_SIZE(powerpc_opcodes);
>>  .
>>  /* The VLE opcode table.
>>  
>> @@ -7219,8 +7217,7 @@
>>  {"se_bl",	BD8(58,0,1),	BD8_MASK,	PPCVLE,	0,		{B8}},
>>  };
>>  
>> -const int vle_num_opcodes =
>> -  sizeof (vle_opcodes) / sizeof (vle_opcodes[0]);
>> +const int vle_num_opcodes = ARRAY_SIZE(vle_opcodes);
>>  .
>>  /* The macro table.  This is only used by the assembler.  */
>>  
>> @@ -7288,5 +7285,4 @@
>>  {"e_clrlslwi",4, PPCVLE, "e_rlwinm %0,%1,%3,(%2)-(%3),31-(%3)"},
>>  };
>>  
>> -const int powerpc_num_macros =
>> -  sizeof (powerpc_macros) / sizeof (powerpc_macros[0]);
>> +const int powerpc_num_macros = ARRAY_SIZE(powerpc_macros);
>> -- 
>> 1.7.12.4
> .
>