Re: [PATCH v3] erofs: add sysfs feature entry for xattr prefixes

[Greg KH]

On Wed, Sep 02, 2026 at 09:50:39AM +0800, Jingbo Xu wrote:
> Let /sys/fs/erofs/features/xattr_prefixes advertise that this kernel
> supports the EROFS_FEATURE_INCOMPAT_XATTR_PREFIXES on-disk format.
> 
> Fixes: 6a318ccd7e08 ("erofs: enable long extended attribute name prefixes")
> Cc: <stable@xxxxxxxxxxxxxxx> # 6.4+
> Reviewed-by: Gao Xiang <xiang@xxxxxxxxxx>
> Signed-off-by: Jingbo Xu <jefflexu@xxxxxxxxxxxxxxxxx>
> ---
> changes since v2:
> - add Reviewed-by tag (Gao Xiang)
> - update list in Documentation/ABI/testing/sysfs-fs-erofs
> (https://sashiko.dev/#/patchset/20260901062243.109172-1-jefflexu%40linux.alibaba.com)
> ---
>  Documentation/ABI/testing/sysfs-fs-erofs | 2 +-
>  fs/erofs/sysfs.c                         | 2 ++
>  2 files changed, 3 insertions(+), 1 deletion(-)

Why is adding a new feature a stable thing?

confused,

greg k-h