Re: [patch 05/17] ocfs2: protect extent tree in ocfs2_prepare_inode_for_write()

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On Wed, 6 Nov 2019 08:41:44 -0800 Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

> On Tue, Nov 5, 2019 at 9:16 PM <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
> >
> > From: Shuning Zhang <sunny.s.zhang@xxxxxxxxxx>
> > Subject: ocfs2: protect extent tree in ocfs2_prepare_inode_for_write()
> >
> > When the extent tree is modified, it should be protected by inode cluster
> > lock and ip_alloc_sem.
> >
> > The extent tree is accessed and modified in the
> > ocfs2_prepare_inode_for_write, but isn't protected by ip_alloc_sem.
> 
> This patch results in a new warning for me:
> 
>   fs/ocfs2/file.c:2101:12: warning: ‘ocfs2_prepare_inode_for_refcount’
> defined but not used [-Wunused-function]
>    2101 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode,
>         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> and I'm wondering why nobody seems  to have noticed that or fixed
> things? Because it does look like this removed the only use of that
> function, and everybody who compiled this should have seen this
> warning?
> 

Oop, sorry, that's in a separate patch which I failed to squish.  Shall
send now.






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