convert nilfs2 to ->evict_inode()

[folded build fix from sfr]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/nilfs2/inode.c

@@ -27,6 +27,7 @@
 #include <linux/writeback.h>
 #include <linux/uio.h>
 #include "nilfs.h"
+#include "btnode.h"
 #include "segment.h"
 #include "page.h"
 #include "mdt.h"
@@ -354,7 +355,6 @@ void nilfs_free_inode(struct inode *inode)
 	struct super_block *sb = inode->i_sb;
 	struct nilfs_sb_info *sbi = NILFS_SB(sb);
 
-	clear_inode(inode);
 	/* XXX: check error code? Is there any thing I can do? */
 	(void) nilfs_ifile_delete_inode(sbi->s_ifile, inode->i_ino);
 	atomic_dec(&sbi->s_inodes_count);
@@ -614,16 +614,34 @@ void nilfs_truncate(struct inode *inode)
 	   But truncate has no return value. */
 }
 
-void nilfs_delete_inode(struct inode *inode)
+static void nilfs_clear_inode(struct inode *inode)
+{
+	struct nilfs_inode_info *ii = NILFS_I(inode);
+
+	/*
+	 * Free resources allocated in nilfs_read_inode(), here.
+	 */
+	BUG_ON(!list_empty(&ii->i_dirty));
+	brelse(ii->i_bh);
+	ii->i_bh = NULL;
+
+	if (test_bit(NILFS_I_BMAP, &ii->i_state))
+		nilfs_bmap_clear(ii->i_bmap);
+
+	nilfs_btnode_cache_clear(&ii->i_btnode_cache);
+}
+
+void nilfs_evict_inode(struct inode *inode)
 {
 	struct nilfs_transaction_info ti;
 	struct super_block *sb = inode->i_sb;
 	struct nilfs_inode_info *ii = NILFS_I(inode);
 
-	if (unlikely(is_bad_inode(inode))) {
+	if (inode->i_nlink || unlikely(is_bad_inode(inode))) {
 		if (inode->i_data.nrpages)
 			truncate_inode_pages(&inode->i_data, 0);
-		clear_inode(inode);
+		end_writeback(inode);
+		nilfs_clear_inode(inode);
 		return;
 	}
 	nilfs_transaction_begin(sb, &ti, 0); /* never fails */
@@ -633,6 +651,8 @@ void nilfs_delete_inode(struct inode *inode)
 
 	nilfs_truncate_bmap(ii, 0);
 	nilfs_mark_inode_dirty(inode);
+	end_writeback(inode);
+	nilfs_clear_inode(inode);
 	nilfs_free_inode(inode);
 	/* nilfs_free_inode() marks inode buffer dirty */
 	if (IS_SYNC(inode))

fs/nilfs2/nilfs.h

@@ -245,7 +245,7 @@ extern void nilfs_write_inode_common(struct inode *, struct nilfs_inode *, int);
 extern struct inode *nilfs_iget(struct super_block *, unsigned long);
 extern void nilfs_update_inode(struct inode *, struct buffer_head *);
 extern void nilfs_truncate(struct inode *);
-extern void nilfs_delete_inode(struct inode *);
+extern void nilfs_evict_inode(struct inode *);
 extern int nilfs_setattr(struct dentry *, struct iattr *);
 extern int nilfs_load_inode_block(struct nilfs_sb_info *, struct inode *,
 				  struct buffer_head **);

fs/nilfs2/super.c

@@ -159,23 +159,6 @@ void nilfs_destroy_inode(struct inode *inode)
 	kmem_cache_free(nilfs_inode_cachep, NILFS_I(inode));
 }
 
-static void nilfs_clear_inode(struct inode *inode)
-{
-	struct nilfs_inode_info *ii = NILFS_I(inode);
-
-	/*
-	 * Free resources allocated in nilfs_read_inode(), here.
-	 */
-	BUG_ON(!list_empty(&ii->i_dirty));
-	brelse(ii->i_bh);
-	ii->i_bh = NULL;
-
-	if (test_bit(NILFS_I_BMAP, &ii->i_state))
-		nilfs_bmap_clear(ii->i_bmap);
-
-	nilfs_btnode_cache_clear(&ii->i_btnode_cache);
-}
-
 static int nilfs_sync_super(struct nilfs_sb_info *sbi, int dupsb)
 {
 	struct the_nilfs *nilfs = sbi->s_nilfs;
@@ -467,7 +450,7 @@ static const struct super_operations nilfs_sops = {
 	/* .write_inode    = nilfs_write_inode, */
 	/* .put_inode      = nilfs_put_inode, */
 	/* .drop_inode	  = nilfs_drop_inode, */
-	.delete_inode   = nilfs_delete_inode,
+	.evict_inode    = nilfs_evict_inode,
 	.put_super      = nilfs_put_super,
 	/* .write_super    = nilfs_write_super, */
 	.sync_fs        = nilfs_sync_fs,
@@ -475,7 +458,6 @@ static const struct super_operations nilfs_sops = {
 	/* .unlockfs */
 	.statfs         = nilfs_statfs,
 	.remount_fs     = nilfs_remount,
-	.clear_inode    = nilfs_clear_inode,
 	/* .umount_begin */
 	.show_options = nilfs_show_options
 };