Hello, Li.

On Sat, Sep 20, 2014 at 02:49:10PM +0800, Zefan Li wrote:

Both pinned_sb and new_sb indicate if a new superblock is needed,
so we can just remove new_sb.

Note now we must check if kernfs_tryget_sb() returns NULL, because
when it returns NULL, kernfs_mount() may still re-use an existing
superblock, which is just allocated by another concurent mount.

Suggested-by: Tejun Heo <redacted>
Signed-off-by: Zefan Li <redacted>

Ah, this is so much better.  Thanks for doing this.  Applied to
cgroup/for-3.18.

---

Hi Tejun,

I think you wanted to see the @new_sb argument removed from kernfs_mount(),
but it's also used in debugfs and we can't use kernfs_tryget_sb() to
replace the new_sb check.

Bummer, someday. :)

Thanks.

-- 
tejun