On Mon, 2018-02-19 at 11:45 -0800, Matthew Wilcox wrote:
> From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
>
> XFS currently contains a copy-and-paste of __set_page_dirty(). Export
> it from buffer.c instead.
>
> Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
> ---
> fs/buffer.c | 3 ++-
> fs/xfs/xfs_aops.c | 15 ++-------------
> include/linux/mm.h | 1 +
> 3 files changed, 5 insertions(+), 14 deletions(-)
>
> diff --git a/fs/buffer.c b/fs/buffer.c
> index 9a73924db22f..0b487cdb7124 100644
> --- a/fs/buffer.c
> +++ b/fs/buffer.c
> @@ -594,7 +594,7 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode);
> *
> * The caller must hold lock_page_memcg().
> */
> -static void __set_page_dirty(struct page *page, struct address_space *mapping,
> +void __set_page_dirty(struct page *page, struct address_space *mapping,
> int warn)
> {
> unsigned long flags;
> @@ -608,6 +608,7 @@ static void __set_page_dirty(struct page *page, struct address_space *mapping,
> }
> spin_unlock_irqrestore(&mapping->tree_lock, flags);
> }
> +EXPORT_SYMBOL_GPL(__set_page_dirty);
>
> /*
> * Add a page to the dirty page list.
> diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
> index 9c6a830da0ee..31f2c4895a46 100644
> --- a/fs/xfs/xfs_aops.c
> +++ b/fs/xfs/xfs_aops.c
> @@ -1472,19 +1472,8 @@ xfs_vm_set_page_dirty(
> newly_dirty = !TestSetPageDirty(page);
> spin_unlock(&mapping->private_lock);
>
> - if (newly_dirty) {
> - /* sigh - __set_page_dirty() is static, so copy it here, too */
> - unsigned long flags;
> -
> - spin_lock_irqsave(&mapping->tree_lock, flags);
> - if (page->mapping) { /* Race with truncate? */
> - WARN_ON_ONCE(!PageUptodate(page));
> - account_page_dirtied(page, mapping);
> - radix_tree_tag_set(&mapping->page_tree,
> - page_index(page), PAGECACHE_TAG_DIRTY);
> - }
> - spin_unlock_irqrestore(&mapping->tree_lock, flags);
> - }
> + if (newly_dirty)
> + __set_page_dirty(page, mapping, 1);
> unlock_page_memcg(page);
> if (newly_dirty)
> __mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index ad06d42adb1a..47b0fb0a6e41 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -1454,6 +1454,7 @@ extern int try_to_release_page(struct page * page, gfp_t gfp_mask);
> extern void do_invalidatepage(struct page *page, unsigned int offset,
> unsigned int length);
>
> +void __set_page_dirty(struct page *, struct address_space *, int warn);
> int __set_page_dirty_nobuffers(struct page *page);
> int __set_page_dirty_no_writeback(struct page *page);
> int redirty_page_for_writepage(struct writeback_control *wbc,
Acked-by: Jeff Layton <jlayton@xxxxxxxxxx>
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