[PATCH] fs/buffer.c exports for NTFS

I renamed the functions to more descriptive names:

	create_buffers -> alloc_page_buffers
	__set_page_buffers -> attach_page_buffers

And I added a EXPORT_SYMBOL_GPL for alloc_page_buffers and made
attach_page_buffers static inline and moved it to <linux/buffer_head.h>.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/buffer.c

@@ -90,14 +90,6 @@ void __wait_on_buffer(struct buffer_head * bh)
 	wait_on_bit(&bh->b_state, BH_Lock, sync_buffer, TASK_UNINTERRUPTIBLE);
 }
 
-static void
-__set_page_buffers(struct page *page, struct buffer_head *head)
-{
-	page_cache_get(page);
-	SetPagePrivate(page);
-	page->private = (unsigned long)head;
-}
-
 static void
 __clear_page_buffers(struct page *page)
 {
@@ -1013,8 +1005,8 @@ int remove_inode_buffers(struct inode *inode)
  * The retry flag is used to differentiate async IO (paging, swapping)
  * which may not fail from ordinary buffer allocations.
  */
-static struct buffer_head *
-create_buffers(struct page * page, unsigned long size, int retry)
+struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size,
+		int retry)
 {
 	struct buffer_head *bh, *head;
 	long offset;
@@ -1072,6 +1064,7 @@ create_buffers(struct page * page, unsigned long size, int retry)
 	free_more_memory();
 	goto try_again;
 }
+EXPORT_SYMBOL_GPL(alloc_page_buffers);
 
 static inline void
 link_dev_buffers(struct page *page, struct buffer_head *head)
@@ -1084,7 +1077,7 @@ link_dev_buffers(struct page *page, struct buffer_head *head)
 		bh = bh->b_this_page;
 	} while (bh);
 	tail->b_this_page = head;
-	__set_page_buffers(page, head);
+	attach_page_buffers(page, head);
 }
 
 /*
@@ -1145,7 +1138,7 @@ grow_dev_page(struct block_device *bdev, sector_t block,
 	/*
 	 * Allocate some buffers for this page
 	 */
-	bh = create_buffers(page, size, 0);
+	bh = alloc_page_buffers(page, size, 0);
 	if (!bh)
 		goto failed;
 
@@ -1651,7 +1644,7 @@ void create_empty_buffers(struct page *page,
 {
 	struct buffer_head *bh, *head, *tail;
 
-	head = create_buffers(page, blocksize, 1);
+	head = alloc_page_buffers(page, blocksize, 1);
 	bh = head;
 	do {
 		bh->b_state |= b_state;
@@ -1671,7 +1664,7 @@ void create_empty_buffers(struct page *page,
 			bh = bh->b_this_page;
 		} while (bh != head);
 	}
-	__set_page_buffers(page, head);
+	attach_page_buffers(page, head);
 	spin_unlock(&page->mapping->private_lock);
 }
 EXPORT_SYMBOL(create_empty_buffers);

include/linux/buffer_head.h

@@ -10,6 +10,7 @@
 #include <linux/types.h>
 #include <linux/fs.h>
 #include <linux/linkage.h>
+#include <linux/pagemap.h>
 #include <linux/wait.h>
 #include <asm/atomic.h>
 
@@ -136,6 +137,8 @@ void init_buffer(struct buffer_head *, bh_end_io_t *, void *);
 void set_bh_page(struct buffer_head *bh,
 		struct page *page, unsigned long offset);
 int try_to_free_buffers(struct page *);
+struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size,
+		int retry);
 void create_empty_buffers(struct page *, unsigned long,
 			unsigned long b_state);
 void end_buffer_read_sync(struct buffer_head *bh, int uptodate);
@@ -205,6 +208,14 @@ int nobh_truncate_page(struct address_space *, loff_t);
  * inline definitions
  */
 
+static inline void attach_page_buffers(struct page *page,
+		struct buffer_head *head)
+{
+	page_cache_get(page);
+	SetPagePrivate(page);
+	page->private = (unsigned long)head;
+}
+
 static inline void get_bh(struct buffer_head *bh)
 {
         atomic_inc(&bh->b_count);