Re: [PATCH V4 03/12] kernfs: add an API to get kernfs node from inode number

[Greg KH]

On Wed, Jun 28, 2017 at 09:29:53AM -0700, Shaohua Li wrote:
> From: Shaohua Li <shli@xxxxxx>
> 
> Add an API to get kernfs node from inode number. We will need this to
> implement exportfs operations.
> 
> This API will be used in blktrace too later, so it should be as fast as
> possible. To make the API lock free, kernfs node is freed in RCU
> context. And we depend on kernfs_node count/ino number to filter out
> stale kernfs nodes.
> 
> Signed-off-by: Shaohua Li <shli@xxxxxx>

Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>