fs: Convert buffer to XArray

Mostly comment fixes, but one use of __xa_set_mark.

Signed-off-by: Matthew Wilcox <willy@infradead.org>

diff --git a/fs/buffer.c b/fs/buffer.c
index 6f1ae3ac97896c6fff85e947b9fe7a6553368457..1286c2b95498de47d2ba08b57a93901bdf4367bd 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -562,7 +562,7 @@ void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode)
 EXPORT_SYMBOL(mark_buffer_dirty_inode);
 
 /*
- * Mark the page dirty, and set it dirty in the radix tree, and mark the inode
+ * Mark the page dirty, and set it dirty in the page cache, and mark the inode
  * dirty.
  *
  * If warn is true, then emit a warning if the page is not uptodate and has
@@ -579,8 +579,8 @@ void __set_page_dirty(struct page *page, struct address_space *mapping,
        if (page->mapping) {    /* Race with truncate? */
                WARN_ON_ONCE(warn && !PageUptodate(page));
                account_page_dirtied(page, mapping);
-               radix_tree_tag_set(&mapping->i_pages,
-                               page_index(page), PAGECACHE_TAG_DIRTY);
+               __xa_set_mark(&mapping->i_pages, page_index(page),
+                               PAGECACHE_TAG_DIRTY);
        }
        xa_unlock_irqrestore(&mapping->i_pages, flags);
 }
@@ -1050,7 +1050,7 @@ __getblk_slow(struct block_device *bdev, sector_t block,
  * The relationship between dirty buffers and dirty pages:
  *
  * Whenever a page has any dirty buffers, the page's dirty bit is set, and
- * the page is tagged dirty in its radix tree.
+ * the page is tagged dirty in the page cache.
  *
  * At all times, the dirtiness of the buffers represents the dirtiness of
  * subsections of the page.  If the page has buffers, the page dirty bit is
@@ -1073,9 +1073,9 @@ __getblk_slow(struct block_device *bdev, sector_t block,
  * mark_buffer_dirty - mark a buffer_head as needing writeout
  * @bh: the buffer_head to mark dirty
  *
- * mark_buffer_dirty() will set the dirty bit against the buffer, then set its
- * backing page dirty, then tag the page as dirty in its address_space's radix
- * tree and then attach the address_space's inode to its superblock's dirty
+ * mark_buffer_dirty() will set the dirty bit against the buffer, then set
+ * its backing page dirty, then tag the page as dirty in the page cache
+ * and then attach the address_space's inode to its superblock's dirty
  * inode list.
  *
  * mark_buffer_dirty() is atomic.  It takes bh->b_page->mapping->private_lock,