Patchwork net: core: fix unused variable sparse warning

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Submitter Cong Ding
Date Dec. 7, 2012, 12:06 a.m.
Message ID <1354838913-20084-1-git-send-email-dinggnu@gmail.com>
Download mbox | patch
Permalink /patch/204352/
State Not Applicable
Delegated to: David Miller
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Comments

Cong Ding - Dec. 7, 2012, 12:06 a.m.
the variables zero and unres_qlen_max are only used when CONFIG_SYSCTL is
defined, otherwise it causes the following sparse warning when we turn on
CONFIG_SYSCTL.

Signed-off-by: Cong Ding <dinggnu@gmail.com>
---
 net/core/neighbour.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
Cong Ding - Dec. 7, 2012, 12:15 a.m.
On Fri, Dec 07, 2012 at 12:06:44AM +0000, Cong Ding wrote:
> the variables zero and unres_qlen_max are only used when CONFIG_SYSCTL is
> defined, otherwise it causes the following sparse warning when we turn on
> CONFIG_SYSCTL.
sorry for disturbing again, the sparse warning is
net/core/neighbour.c:65:12: warning: ‘zero’ defined but not used [-Wunused-variable]
net/core/neighbour.c:66:12: warning: ‘unres_qlen_max’ defined but not used [-Wunused-variable]

it happens if we turn off CONFIG_SYSCTL.

> 
> Signed-off-by: Cong Ding <dinggnu@gmail.com>
> ---
>  net/core/neighbour.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/net/core/neighbour.c b/net/core/neighbour.c
> index 36fc692..4a15278 100644
> --- a/net/core/neighbour.c
> +++ b/net/core/neighbour.c
> @@ -62,8 +62,10 @@ static void __neigh_notify(struct neighbour *n, int type, int flags);
>  static void neigh_update_notify(struct neighbour *neigh);
>  static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev);
>  
> +#ifdef CONFIG_SYSCTL
>  static int zero;
>  static int unres_qlen_max = INT_MAX / SKB_TRUESIZE(ETH_FRAME_LEN);
> +#endif
>  
>  static struct neigh_table *neigh_tables;
>  #ifdef CONFIG_PROC_FS
> -- 
> 1.7.4.5
> 
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David Miller - Dec. 7, 2012, 3:25 a.m.
From: Cong Ding <dinggnu@gmail.com>

Date: Fri, 7 Dec 2012 00:15:47 +0000

> On Fri, Dec 07, 2012 at 12:06:44AM +0000, Cong Ding wrote:

>> the variables zero and unres_qlen_max are only used when CONFIG_SYSCTL is

>> defined, otherwise it causes the following sparse warning when we turn on

>> CONFIG_SYSCTL.

> sorry for disturbing again, the sparse warning is

> net/core/neighbour.c:65:12: warning: ‘zero’ defined but not used [-Wunused-variable]

> net/core/neighbour.c:66:12: warning: ‘unres_qlen_max’ defined but not used [-Wunused-variable]

> 

> it happens if we turn off CONFIG_SYSCTL.


A patch for this has already in my tree for nearly a whole day.
Shan Wei - Dec. 7, 2012, 10:45 a.m.
Cong Ding said, at 2012/12/7 8:15:
> On Fri, Dec 07, 2012 at 12:06:44AM +0000, Cong Ding wrote:
>> the variables zero and unres_qlen_max are only used when CONFIG_SYSCTL is
>> defined, otherwise it causes the following sparse warning when we turn on
>> CONFIG_SYSCTL.
> sorry for disturbing again, the sparse warning is
> net/core/neighbour.c:65:12: warning: ‘zero’ defined but not used [-Wunused-variable]
> net/core/neighbour.c:66:12: warning: ‘unres_qlen_max’ defined but not used [-Wunused-variable]
> 
> it happens if we turn off CONFIG_SYSCTL.

It has been fixed yesterday.
see b93196dc5af7729ff7cc50d3d322ab1a364aa14f

> 
>>
>> Signed-off-by: Cong Ding <dinggnu@gmail.com>
>> ---
>>  net/core/neighbour.c |    2 ++
>>  1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/net/core/neighbour.c b/net/core/neighbour.c
>> index 36fc692..4a15278 100644
>> --- a/net/core/neighbour.c
>> +++ b/net/core/neighbour.c
>> @@ -62,8 +62,10 @@ static void __neigh_notify(struct neighbour *n, int type, int flags);
>>  static void neigh_update_notify(struct neighbour *neigh);
>>  static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev);
>>  
>> +#ifdef CONFIG_SYSCTL
>>  static int zero;
>>  static int unres_qlen_max = INT_MAX / SKB_TRUESIZE(ETH_FRAME_LEN);
>> +#endif
>>  
>>  static struct neigh_table *neigh_tables;
>>  #ifdef CONFIG_PROC_FS
>> -- 
>> 1.7.4.5
>>
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Patch

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 36fc692..4a15278 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -62,8 +62,10 @@  static void __neigh_notify(struct neighbour *n, int type, int flags);
 static void neigh_update_notify(struct neighbour *neigh);
 static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev);
 
+#ifdef CONFIG_SYSCTL
 static int zero;
 static int unres_qlen_max = INT_MAX / SKB_TRUESIZE(ETH_FRAME_LEN);
+#endif
 
 static struct neigh_table *neigh_tables;
 #ifdef CONFIG_PROC_FS