pagemap.h: move dir_pages() over there

That function was declared in a lot of filesystems to calculate
directory pages.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

8 files changed, 6 insertions, 38 deletions

diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c
index 4deb0b0..e5bb2ab 100644
--- a/fs/exofs/dir.c
+++ b/fs/exofs/dir.c
@@ -44,12 +44,6 @@ static inline void exofs_put_page(struct page *page)
 	page_cache_release(page);
 }
 
-/* Accesses dir's inode->i_size must be called under inode lock */
-static inline unsigned long dir_pages(struct inode *inode)
-{
-	return (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-}
-
 static unsigned exofs_last_byte(struct inode *inode, unsigned long page_nr)
 {
 	loff_t last_byte = inode->i_size;
diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 796b491..0c6638b 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -70,11 +70,6 @@ static inline void ext2_put_page(struct page *page)
 	page_cache_release(page);
 }
 
-static inline unsigned long dir_pages(struct inode *inode)
-{
-	return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
-}
-
 /*
  * Return the offset into page `page_nr' of the last valid
  * byte in that page, plus one.
diff --git a/fs/freevxfs/vxfs_lookup.c b/fs/freevxfs/vxfs_lookup.c
index 99c7f0a..484b32d 100644
--- a/fs/freevxfs/vxfs_lookup.c
+++ b/fs/freevxfs/vxfs_lookup.c
@@ -61,13 +61,6 @@ const struct file_operations vxfs_dir_operations = {
 	.iterate =		vxfs_readdir,
 };
 
- 
-static inline u_long
-dir_pages(struct inode *inode)
-{
-	return (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-}
- 
 static inline u_long
 dir_blocks(struct inode *ip)
 {
diff --git a/fs/minix/dir.c b/fs/minix/dir.c
index 118e4e7..d19ac25 100644
--- a/fs/minix/dir.c
+++ b/fs/minix/dir.c
@@ -45,11 +45,6 @@ minix_last_byte(struct inode *inode, unsigned long page_nr)
 	return last_byte;
 }
 
-static inline unsigned long dir_pages(struct inode *inode)
-{
-	return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
-}
-
 static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)
 {
 	struct address_space *mapping = page->mapping;
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index 0ee0bed..6b8b92b 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -61,11 +61,6 @@ static inline void nilfs_put_page(struct page *page)
 	page_cache_release(page);
 }
 
-static inline unsigned long dir_pages(struct inode *inode)
-{
-	return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
-}
-
 /*
  * Return the offset into page `page_nr' of the last valid
  * byte in that page, plus one.
diff --git a/fs/qnx6/dir.c b/fs/qnx6/dir.c
index 8d64bb5..e1f3727 100644
--- a/fs/qnx6/dir.c
+++ b/fs/qnx6/dir.c
@@ -32,11 +32,6 @@ static struct page *qnx6_get_page(struct inode *dir, unsigned long n)
 	return page;
 }
 
-static inline unsigned long dir_pages(struct inode *inode)
-{
-	return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
-}
-
 static unsigned last_entry(struct inode *inode, unsigned long page_nr)
 {
 	unsigned long last_byte = inode->i_size;
diff --git a/fs/sysv/dir.c b/fs/sysv/dir.c
index 8f3555f..63c1bcb 100644
--- a/fs/sysv/dir.c
+++ b/fs/sysv/dir.c
@@ -33,11 +33,6 @@ static inline void dir_put_page(struct page *page)
 	page_cache_release(page);
 }
 
-static inline unsigned long dir_pages(struct inode *inode)
-{
-	return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
-}
-
 static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)
 {
 	struct address_space *mapping = page->mapping;
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 4b3736f..808942d 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -670,4 +670,10 @@ static inline int add_to_page_cache(struct page *page,
 	return error;
 }
 
+static inline unsigned long dir_pages(struct inode *inode)
+{
+	return (unsigned long)(inode->i_size + PAGE_CACHE_SIZE - 1) >>
+			       PAGE_CACHE_SHIFT;
+}
+
 #endif /* _LINUX_PAGEMAP_H */