linux-kernel - [RFC PATCH 48/62] ntfs: switch to ->free

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Date:   Tue, 16 Apr 2019 18:53:26 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [RFC PATCH 48/62] ntfs: switch to ->free_inode()

From: Al Viro <viro@...iv.linux.org.uk>

move the synchronous stuff from ->destroy_inode() to ->evict_inode(),
turn the RCU-delayed part into ->free_inode()

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 fs/ntfs/inode.c | 17 ++++-------------
 fs/ntfs/inode.h |  2 +-
 fs/ntfs/super.c |  2 +-
 3 files changed, 6 insertions(+), 15 deletions(-)

diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index bd3221cbdd95..fb1a2b49a5da 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -332,23 +332,11 @@ struct inode *ntfs_alloc_big_inode(struct super_block *sb)
 	return NULL;
 }
 
-static void ntfs_i_callback(struct rcu_head *head)
+void ntfs_free_big_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
 }
 
-void ntfs_destroy_big_inode(struct inode *inode)
-{
-	ntfs_inode *ni = NTFS_I(inode);
-
-	ntfs_debug("Entering.");
-	BUG_ON(ni->page);
-	if (!atomic_dec_and_test(&ni->count))
-		BUG();
-	call_rcu(&inode->i_rcu, ntfs_i_callback);
-}
-
 static inline ntfs_inode *ntfs_alloc_extent_inode(void)
 {
 	ntfs_inode *ni;
@@ -2287,6 +2275,9 @@ void ntfs_evict_big_inode(struct inode *vi)
 			ni->ext.base_ntfs_ino = NULL;
 		}
 	}
+	BUG_ON(ni->page);
+	if (!atomic_dec_and_test(&ni->count))
+		BUG();
 	return;
 }
 
diff --git a/fs/ntfs/inode.h b/fs/ntfs/inode.h
index b3c3469de6cb..58c8fd2948d3 100644
--- a/fs/ntfs/inode.h
+++ b/fs/ntfs/inode.h
@@ -278,7 +278,7 @@ extern struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name,
 		u32 name_len);
 
 extern struct inode *ntfs_alloc_big_inode(struct super_block *sb);
-extern void ntfs_destroy_big_inode(struct inode *inode);
+extern void ntfs_free_big_inode(struct inode *inode);
 extern void ntfs_evict_big_inode(struct inode *vi);
 
 extern void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni);
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index bb7159f697f2..887ea8b3b000 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2676,7 +2676,7 @@ static int ntfs_write_inode(struct inode *vi, struct writeback_control *wbc)
  */
 static const struct super_operations ntfs_sops = {
 	.alloc_inode	= ntfs_alloc_big_inode,	  /* VFS: Allocate new inode. */
-	.destroy_inode	= ntfs_destroy_big_inode, /* VFS: Deallocate inode. */
+	.free_inode	= ntfs_free_big_inode, /* VFS: Deallocate inode. */
 #ifdef NTFS_RW
 	.write_inode	= ntfs_write_inode,	/* VFS: Write dirty inode to
 						   disk. */
-- 
2.11.0