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Subject[PATCH v9 05/61] Export __set_page_dirty
Date
From: Matthew Wilcox <mawilcox@microsoft.com>

XFS currently contains a copy-and-paste of __set_page_dirty(). Export
it from buffer.c instead.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
---
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 17f13191a552..62bf5445c921 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 a0afb6411417..f51350cb98a7 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1473,19 +1473,8 @@ 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 4d02524a7998..7f7bb4c28497 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1456,6 +1456,7 @@ 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,
--
2.16.1
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