On Wed, Jan 23, 2019 at 12:41:16PM +0100, Christian Brauner wrote:
> binderfs should not have a separate device_initcall(). When a kernel is
> compiled with CONFIG_ANDROID_BINDERFS register the filesystem alongside
> CONFIG_ANDROID_IPC. This use-case is especially sensible when users specify
> CONFIG_ANDROID_IPC=y, CONFIG_ANDROID_BINDERFS=y and
> ANDROID_BINDER_DEVICES="".
> When CONFIG_ANDROID_BINDERFS=n then this always succeeds so there's no
> regression potential for legacy workloads.
>
> Signed-off-by: Christian Brauner <christian@xxxxxxxxxx>
> ---
> drivers/android/binder.c | 4 ++++
> drivers/android/binder_internal.h | 9 +++++++++
> drivers/android/binderfs.c | 4 +---
> 3 files changed, 14 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/android/binder.c b/drivers/android/binder.c
> index cdfc87629efb..751d76173f81 100644
> --- a/drivers/android/binder.c
> +++ b/drivers/android/binder.c
> @@ -5915,6 +5915,10 @@ static int __init binder_init(void)
> goto err_init_binder_device_failed;
> }
>
> + ret = init_binderfs();
> + if (ret)
> + goto err_init_binder_device_failed;
> +
> return ret;
>
> err_init_binder_device_failed:
> diff --git a/drivers/android/binder_internal.h b/drivers/android/binder_internal.h
> index 7fb97f503ef2..045b3e42d98b 100644
> --- a/drivers/android/binder_internal.h
> +++ b/drivers/android/binder_internal.h
> @@ -46,4 +46,13 @@ static inline bool is_binderfs_device(const struct inode *inode)
> }
> #endif
>
> +#ifdef CONFIG_ANDROID_BINDERFS
> +extern int __init init_binderfs(void);
> +#else
> +static inline int __init init_binderfs(void)
> +{
> + return 0;
> +}
> +#endif
> +
> #endif /* _LINUX_BINDER_INTERNAL_H */
> diff --git a/drivers/android/binderfs.c b/drivers/android/binderfs.c
> index 7a550104a722..e773f45d19d9 100644
> --- a/drivers/android/binderfs.c
> +++ b/drivers/android/binderfs.c
> @@ -550,7 +550,7 @@ static struct file_system_type binder_fs_type = {
> .fs_flags = FS_USERNS_MOUNT,
> };
>
> -static int __init init_binderfs(void)
> +int __init init_binderfs(void)
> {
> int ret;
>
> @@ -568,5 +568,3 @@ static int __init init_binderfs(void)
>
> return ret;
> }
> -
> -device_initcall(init_binderfs);
I get a build warning when applying this patch :(
Please fix up and resend.
thanks,
greg k-h
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