[PATCH RFC PKS/PMEM 36/58] fs/ext2: Use ext2_put_page

[ira.weiny@xxxxxxxxx]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

There are 3 places in namei.c where the equivalent of ext2_put_page() is
open coded.  We want to use k[un]map_thread() instead of k[un]map() in
ext2_[get|put]_page().

Move ext2_put_page() to ext2.h and use it in namei.c in prep for
converting the k[un]map() code.

Cc: Jan Kara <jack@xxxxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
 fs/ext2/dir.c   |  6 ------
 fs/ext2/ext2.h  |  8 ++++++++
 fs/ext2/namei.c | 15 +++++----------
 3 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 70355ab6740e..f3194bf20733 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -66,12 +66,6 @@ static inline unsigned ext2_chunk_size(struct inode *inode)
        return inode->i_sb->s_blocksize;
 }
 
-static inline void ext2_put_page(struct page *page)
-{
-       kunmap(page);
-       put_page(page);
-}
-
 /*
  * Return the offset into page `page_nr' of the last valid
  * byte in that page, plus one.
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 5136b7289e8d..021ec8b42ac3 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -16,6 +16,8 @@
 #include <linux/blockgroup_lock.h>
 #include <linux/percpu_counter.h>
 #include <linux/rbtree.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
 
 /* XXX Here for now... not interested in restructing headers JUST now */
 
@@ -745,6 +747,12 @@ extern int ext2_delete_entry (struct ext2_dir_entry_2 *, 
struct page *);
 extern int ext2_empty_dir (struct inode *);
 extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **);
 extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct 
page *, struct inode *, int);
+static inline void ext2_put_page(struct page *page)
+{
+       kunmap(page);
+       put_page(page);
+}
+
 
 /* ialloc.c */
 extern struct inode * ext2_new_inode (struct inode *, umode_t, const struct 
qstr *);
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index 5bf2c145643b..ea980f1e2e99 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -389,23 +389,18 @@ static int ext2_rename (struct inode * old_dir, struct 
dentry * old_dentry,
        if (dir_de) {
                if (old_dir != new_dir)
                        ext2_set_link(old_inode, dir_de, dir_page, new_dir, 0);
-               else {
-                       kunmap(dir_page);
-                       put_page(dir_page);
-               }
+               else
+                       ext2_put_page(dir_page);
                inode_dec_link_count(old_dir);
        }
        return 0;
 
 
 out_dir:
-       if (dir_de) {
-               kunmap(dir_page);
-               put_page(dir_page);
-       }
+       if (dir_de)
+               ext2_put_page(dir_page);
 out_old:
-       kunmap(old_page);
-       put_page(old_page);
+       ext2_put_page(old_page);
 out:
        return err;
 }
-- 
2.28.0.rc0.12.gb6a658bd00c9