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[PATCH] apparmor: hide unused get_loaddata_common_ref() function

Arnd Bergmann posted 1 patch 3 weeks ago 
security/apparmor/apparmorfs.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
[PATCH] apparmor: hide unused get_loaddata_common_ref() function
Posted by Arnd Bergmann 3 weeks ago 
From: Arnd Bergmann <arnd@arndb.de>

The newly introduced function is only used in an #ifdef block,
which causes a harmless warning:

security/apparmor/apparmorfs.c:177:28: error: 'get_loaddata_common_ref' defined but not used [-Werror=unused-function]
  177 | static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref)

Move the definition next to the user to avoid the warning.

Fixes: 8e135b8aee5a ("apparmor: fix race between freeing data and fs accessing it")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
Alternatively, the #ifdef checks could be replaced with an
'if(IS_ENABLED(CONFIG_SECURITY_APPARMOR_EXPORT_BINARY) return;'
check in __aa_fs_create_rawdata(), relying on the compiler's
dead code elimination.
---
 security/apparmor/apparmorfs.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
index ededaf46f3ca..f762b101d682 100644
--- a/security/apparmor/apparmorfs.c
+++ b/security/apparmor/apparmorfs.c
@@ -174,14 +174,6 @@ static struct aa_proxy *get_proxy_common_ref(struct aa_common_ref *ref)
 	return NULL;
 }
 
-static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref)
-{
-	if (ref)
-		return aa_get_i_loaddata(container_of(ref, struct aa_loaddata,
-						      count));
-	return NULL;
-}
-
 static void aa_put_common_ref(struct aa_common_ref *ref)
 {
 	if (!ref)
@@ -1318,6 +1310,14 @@ static const struct file_operations seq_rawdata_ ##NAME ##_fops = {	      \
 	.release	= seq_rawdata_release,				      \
 }									      \
 
+static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref)
+{
+	if (ref)
+		return aa_get_i_loaddata(container_of(ref, struct aa_loaddata,
+						      count));
+	return NULL;
+}
+
 static int seq_rawdata_open(struct inode *inode, struct file *file,
 			    int (*show)(struct seq_file *, void *))
 {
-- 
2.39.5
Re: [PATCH] apparmor: hide unused get_loaddata_common_ref() function
Posted by John Johansen 2 weeks, 5 days ago 
On 3/16/26 06:59, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The newly introduced function is only used in an #ifdef block,
> which causes a harmless warning:
> 
> security/apparmor/apparmorfs.c:177:28: error: 'get_loaddata_common_ref' defined but not used [-Werror=unused-function]
>    177 | static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref)
> 
> Move the definition next to the user to avoid the warning.
> 
> Fixes: 8e135b8aee5a ("apparmor: fix race between freeing data and fs accessing it")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: John Johansen <john.johansen@canonical.com>

this has now been pulled into my tree

> ---
> Alternatively, the #ifdef checks could be replaced with an
> 'if(IS_ENABLED(CONFIG_SECURITY_APPARMOR_EXPORT_BINARY) return;'
> check in __aa_fs_create_rawdata(), relying on the compiler's
> dead code elimination.
> ---
>   security/apparmor/apparmorfs.c | 16 ++++++++--------
>   1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
> index ededaf46f3ca..f762b101d682 100644
> --- a/security/apparmor/apparmorfs.c
> +++ b/security/apparmor/apparmorfs.c
> @@ -174,14 +174,6 @@ static struct aa_proxy *get_proxy_common_ref(struct aa_common_ref *ref)
>   	return NULL;
>   }
>   
> -static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref)
> -{
> -	if (ref)
> -		return aa_get_i_loaddata(container_of(ref, struct aa_loaddata,
> -						      count));
> -	return NULL;
> -}
> -
>   static void aa_put_common_ref(struct aa_common_ref *ref)
>   {
>   	if (!ref)
> @@ -1318,6 +1310,14 @@ static const struct file_operations seq_rawdata_ ##NAME ##_fops = {	      \
>   	.release	= seq_rawdata_release,				      \
>   }									      \
>   
> +static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref)
> +{
> +	if (ref)
> +		return aa_get_i_loaddata(container_of(ref, struct aa_loaddata,
> +						      count));
> +	return NULL;
> +}
> +
>   static int seq_rawdata_open(struct inode *inode, struct file *file,
>   			    int (*show)(struct seq_file *, void *))
>   {
Re: [PATCH] apparmor: hide unused get_loaddata_common_ref() function
Posted by Serge E. Hallyn 3 weeks ago 
On Mon, Mar 16, 2026 at 02:59:31PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The newly introduced function is only used in an #ifdef block,
> which causes a harmless warning:
> 
> security/apparmor/apparmorfs.c:177:28: error: 'get_loaddata_common_ref' defined but not used [-Werror=unused-function]
>   177 | static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref)
> 
> Move the definition next to the user to avoid the warning.
> 
> Fixes: 8e135b8aee5a ("apparmor: fix race between freeing data and fs accessing it")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Serge Hallyn <serge@hallyn.com>

> ---
> Alternatively, the #ifdef checks could be replaced with an
> 'if(IS_ENABLED(CONFIG_SECURITY_APPARMOR_EXPORT_BINARY) return;'
> check in __aa_fs_create_rawdata(), relying on the compiler's
> dead code elimination.
> ---
>  security/apparmor/apparmorfs.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
> index ededaf46f3ca..f762b101d682 100644
> --- a/security/apparmor/apparmorfs.c
> +++ b/security/apparmor/apparmorfs.c
> @@ -174,14 +174,6 @@ static struct aa_proxy *get_proxy_common_ref(struct aa_common_ref *ref)
>  	return NULL;
>  }
>  
> -static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref)
> -{
> -	if (ref)
> -		return aa_get_i_loaddata(container_of(ref, struct aa_loaddata,
> -						      count));
> -	return NULL;
> -}
> -
>  static void aa_put_common_ref(struct aa_common_ref *ref)
>  {
>  	if (!ref)
> @@ -1318,6 +1310,14 @@ static const struct file_operations seq_rawdata_ ##NAME ##_fops = {	      \
>  	.release	= seq_rawdata_release,				      \
>  }									      \
>  
> +static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref)
> +{
> +	if (ref)
> +		return aa_get_i_loaddata(container_of(ref, struct aa_loaddata,
> +						      count));
> +	return NULL;
> +}
> +
>  static int seq_rawdata_open(struct inode *inode, struct file *file,
>  			    int (*show)(struct seq_file *, void *))
>  {
> -- 
> 2.39.5

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