linux-kernel - Re: [PATCH]ipmi:ipmi_si_intf.c Fix warning: variable 'addr

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Date:	Tue, 06 Jul 2010 07:30:53 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	Corey Minyard <minyard@....org>
CC:	akpm@...ux-foundation.org,
	openipmi-developer@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH]ipmi:ipmi_si_intf.c Fix warning: variable 'addr_space'
 set but not used

On 07/06/2010 06:57 AM, Corey Minyard wrote:
> Well, this patch is incorrect because IPMI_IO_ADDR_SPACE is zero.  I'm
> not sure what your change is trying to accomplish, anyway. This is
> actually dead code from a previous change, I believe, and just needs to
> be removed. I did find that document at
> http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf, not
> sure if there's a more reliable place to find it.
>
> -corey
>

cool thanks.. so it's dead code..I'll resend then with it removed.
as for the web address I don't know how you found that.. i.e. I spent at 
least 45mins looking on that site for that *.pdf(searching gives nothing 
etc..)

> On 07/05/2010 11:31 PM, Justin P. Mattock wrote:
>> Remove addr_space in exchange for two symbols that represent
>> mm = IPMI_MEM_ADDR_SPACE;
>> io = IPMI_IO_ADDR_SPACE;
>> then add a dev_warn printing information so that GCC doesn't give a
>> warning when building the kernel.
>> the original warning from GCC is this:
>>
>> CC [M] drivers/char/ipmi/ipmi_si_intf.o
>> drivers/char/ipmi/ipmi_si_intf.c: In function 'try_init_spmi':
>> drivers/char/ipmi/ipmi_si_intf.c:2016:8: warning: variable
>> 'addr_space' set but not used
>>
>> And also the web address pointing to a *.pdf is no where to be
>> found(or atleast I couldn't
>> find it), so just use the web site itself(if somebody has the *.pdf
>> let me know I can change this).
>>
>> Signed-off-by: Justin P. Mattock<justinmattock@...il.com>
>>
>> ---
>> drivers/char/ipmi/ipmi_si_intf.c | 14 +++++++++-----
>> 1 files changed, 9 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/char/ipmi/ipmi_si_intf.c
>> b/drivers/char/ipmi/ipmi_si_intf.c
>> index 094bdc3..969e69a 100644
>> --- a/drivers/char/ipmi/ipmi_si_intf.c
>> +++ b/drivers/char/ipmi/ipmi_si_intf.c
>> @@ -1965,8 +1965,7 @@ static int acpi_gpe_irq_setup(struct smi_info
>> *info)
>>
>> /*
>> * Defined at
>> - * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/
>> - * Docs/TechPapers/IA64/hpspmi.pdf
>> + * http://h21007.www2.hp.com/portal/site/dspp
>> */
>> struct SPMITable {
>> s8 Signature[4];
>> @@ -2013,7 +2012,7 @@ struct SPMITable {
>> static __devinit int try_init_spmi(struct SPMITable *spmi)
>> {
>> struct smi_info *info;
>> - u8 addr_space;
>> + u8 mem, io;
>>
>> if (spmi->IPMIlegacy != 1) {
>> printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
>> @@ -2021,9 +2020,14 @@ static __devinit int try_init_spmi(struct
>> SPMITable *spmi)
>> }
>>
>> if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
>> - addr_space = IPMI_MEM_ADDR_SPACE;
>> + mem = IPMI_MEM_ADDR_SPACE;
>> else
>> - addr_space = IPMI_IO_ADDR_SPACE;
>> + io = IPMI_IO_ADDR_SPACE;
>> +
>> + if (mem || io) {
>> + dev_warn(info->dev, "spmi address space %d\n", mem ?: io);
>> + return 0;
>> + }
>>
>> info = kzalloc(sizeof(*info), GFP_KERNEL);
>> if (!info) {
>
>

Justin P. Mattock
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