On 2019/3/5 21:24, Arnd Bergmann wrote:
> A bugfix just broke compilation of appletalk when CONFIG_SYSCTL
> is disabled:
>
> In file included from net/appletalk/ddp.c:65:
> net/appletalk/ddp.c: In function 'atalk_init':
> include/linux/atalk.h:164:34: error: expected expression before 'do'
> #define atalk_register_sysctl() do { } while(0)
> ^~
> net/appletalk/ddp.c:1934:7: note: in expansion of macro
> 'atalk_register_sysctl'
> rc = atalk_register_sysctl();
>
> This is easier to avoid by using conventional inline functions
> as stubs rather than macros. The header already has inline
> functions for other purposes, so I'm changing over all the
> macros for consistency.
>
Thank you for fix this
> Fixes: 6377f787aeb9 ("appletalk: Fix use-after-free in atalk_proc_exit")
> Signed-off-by: Arnd Bergmann <[email protected]>
> ---
> include/linux/atalk.h | 18 ++++++++++++++----
> 1 file changed, 14 insertions(+), 4 deletions(-)
>
> diff --git a/include/linux/atalk.h b/include/linux/atalk.h
> index 5a90f28d5ff2..d5cfc0b15b76 100644
> --- a/include/linux/atalk.h
> +++ b/include/linux/atalk.h
> @@ -161,16 +161,26 @@ extern int sysctl_aarp_resolve_time;
> extern int atalk_register_sysctl(void);
> extern void atalk_unregister_sysctl(void);
> #else
> -#define atalk_register_sysctl() do { } while(0)
> -#define atalk_unregister_sysctl() do { } while(0)
> +static inline int atalk_register_sysctl(void)
> +{
> + return 0;
> +}
> +static inline void atalk_unregister_sysctl(void)
> +{
> +}
> #endif
>
> #ifdef CONFIG_PROC_FS
> extern int atalk_proc_init(void);
> extern void atalk_proc_exit(void);
> #else
> -#define atalk_proc_init() ({ 0; })
> -#define atalk_proc_exit() do { } while(0)
> +static inline int atalk_proc_init(void)
> +{
> + return 0;
> +}
> +static inline void atalk_proc_exit(void)
> +{
> +}
> #endif /* CONFIG_PROC_FS */
>
> #endif /* __LINUX_ATALK_H__ */
>
