Add two VFS exports used by POHMELFS

Add two VFS exports used by POHMELFS

[Evgeniy Polyakov]

Hi.

POHMELFS is a very high-performance parallel network filesystem with
coherent local cache of data and metadata. It entered maintenance mode
and is being prepared for the next submission cycle.
I decided first to push it into the drivers/staging which was acked
by Greg for the wider testing and review and move into the vanilla tree
in the next merge window.

POHMELFS needs two exports from the core VFS: add_to_page_cache_lru and
__lock_page_killable.

Please apply given patch to the current tree.

Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>

--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -513,6 +513,7 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
 	}
 	return ret;
 }
+EXPORT_SYMBOL_GPL(add_to_page_cache_lru);
 
 #ifdef CONFIG_NUMA
 struct page *__page_cache_alloc(gfp_t gfp)
@@ -627,6 +628,7 @@ int __lock_page_killable(struct page *page)
 	return __wait_on_bit_lock(page_waitqueue(page), &wait,
 					sync_page_killable, TASK_KILLABLE);
 }
+EXPORT_SYMBOL_GPL(__lock_page_killable);
 
 /**
  * __lock_page_nosync - get a lock on the page, without calling sync_page()


-- 
	Evgeniy Polyakov

Re: Add two VFS exports used by POHMELFS

[Greg KH]

On Tue, Jan 13, 2009 at 03:43:46PM +0300, Evgeniy Polyakov wrote:
> Hi.
> 
> POHMELFS is a very high-performance parallel network filesystem with
> coherent local cache of data and metadata. It entered maintenance mode
> and is being prepared for the next submission cycle.
> I decided first to push it into the drivers/staging which was acked
> by Greg for the wider testing and review and move into the vanilla tree
> in the next merge window.
> 
> POHMELFS needs two exports from the core VFS: add_to_page_cache_lru and
> __lock_page_killable.
> 
> Please apply given patch to the current tree.
> 
> Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>

Hm, usually we take exports at the same time the user goes into the
tree.

I don't mind adding these exports with the same patch series to add your
filesystem to the drivers/staging tree, if Andrew and the other vfs
developers agree it's a sane thing to be exporting.

thanks,

greg k-h

Re: Add two VFS exports used by POHMELFS

[Evgeniy Polyakov]

On Tue, Jan 13, 2009 at 08:56:30AM -0800, Greg KH (greg@kroah.com) wrote:
> > POHMELFS is a very high-performance parallel network filesystem with
> > coherent local cache of data and metadata. It entered maintenance mode
> > and is being prepared for the next submission cycle.
> > I decided first to push it into the drivers/staging which was acked
> > by Greg for the wider testing and review and move into the vanilla tree
> > in the next merge window.
> > 
> > POHMELFS needs two exports from the core VFS: add_to_page_cache_lru and
> > __lock_page_killable.
> > 
> > Please apply given patch to the current tree.
> > 
> > Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
> 
> Hm, usually we take exports at the same time the user goes into the
> tree.
> 
> I don't mind adding these exports with the same patch series to add your
> filesystem to the drivers/staging tree, if Andrew and the other vfs
> developers agree it's a sane thing to be exporting.

Ok, I can push them together (just right now :), Andrew, Linus, do you
agree to export those functions?

-- 
	Evgeniy Polyakov