linux-kernel - Re: [PATCH] parisc:Remove unnecessary FIXMES in init.c

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Date:	Wed, 24 Sep 2014 07:42:24 -0400
From:	nick <yocto6@...il.com>
To:	Guenter Roeck <linux@...ck-us.net>
CC:	jejb@...isc-linux.org, deller@....de, akpm@...ux-foundation.org,
	mgorman@...e.de, julia.lawall@...6.fr, himangi774@...il.com,
	linux-parisc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] parisc:Remove unnecessary FIXMES in init.c



On 14-09-24 01:30 AM, Guenter Roeck wrote:
> On Tue, Sep 23, 2014 at 09:49:43PM -0400, Nicholas Krause wrote:
>> This removes the two fixmes in the file, init.c for compiler hints
>> for comments related to compiler hints in linux_gateway_page_addr
>> and map_hpux_gateway_page to change from FIXME to HINT in order
>> for people reading this code to understand that these are compiler
>> hints.
>>
> 
> "* const" tells the compiler that a pointer is a constant.
> It doesn't tell the compiler that the data shall not be treated
> as DP-relative.
> 
> FIXME as in: We should find a better way to tell the compiler to
> not treat this data as DP-relative.
> 
> Can you please stop this ?
> 
> Guenter
> 
>> Signed-off-by: Nicholas Krause <yocto6@...il.com>
>> ---
>>  arch/parisc/mm/init.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
>> index 0bef864..668102e 100644
>> --- a/arch/parisc/mm/init.c
>> +++ b/arch/parisc/mm/init.c
>> @@ -733,7 +733,7 @@ static void __init pagetable_init(void)
>>  static void __init gateway_init(void)
>>  {
>>  	unsigned long linux_gateway_page_addr;
>> -	/* FIXME: This is 'const' in order to trick the compiler
>> +	/* HINT: This is 'const' in order to trick the compiler
>>  	   into not treating it as DP-relative data. */
>>  	extern void * const linux_gateway_page;
>>  
>> @@ -761,7 +761,7 @@ map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm)
>>  	unsigned long start_pte;
>>  	unsigned long address;
>>  	unsigned long hpux_gw_page_addr;
>> -	/* FIXME: This is 'const' in order to trick the compiler
>> +	/* HINT: This is 'const' in order to trick the compiler
>>  	   into not treating it as DP-relative data. */
>>  	extern void * const hpux_gateway_page;
>>  
>> -- 
>> 1.9.1
>>
>> --
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>>
Guenter,
I asked the maintainers and I got, 
On 9/23/2014 4:48 PM, Helge Deller wrote:
> The FIXME: is misleading. It should maybe better read "HINT:" or something like that.
> Trivially it's basically just casting the symbol so that the compiler
> will produce the correct code later on.
> There is nothing you could try to "fix".
Why not just remove "FIXME: " from these comments?

Dave
As the reply.
Cheers Nick 
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