ceph: use generic_delete_inode() for ->drop_inode

ceph_drop_inode() implementation is not any different from the generic
function, thus there's no point in keeping it around.
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

fs/ceph/inode.c

@@ -584,16 +584,6 @@ void ceph_evict_inode(struct inode *inode)
 	ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
 }
 
-int ceph_drop_inode(struct inode *inode)
-{
-	/*
-	 * Positve dentry and corresponding inode are always accompanied
-	 * in MDS reply. So no need to keep inode in the cache after
-	 * dropping all its aliases.
-	 */
-	return 1;
-}
-
 static inline blkcnt_t calc_inode_blocks(u64 size)
 {
 	return (size + (1<<9) - 1) >> 9;

fs/ceph/super.c

@@ -842,7 +842,7 @@ static const struct super_operations ceph_super_ops = {
 	.alloc_inode	= ceph_alloc_inode,
 	.free_inode	= ceph_free_inode,
 	.write_inode    = ceph_write_inode,
-	.drop_inode	= ceph_drop_inode,
+	.drop_inode	= generic_delete_inode,
 	.evict_inode	= ceph_evict_inode,
 	.sync_fs        = ceph_sync_fs,
 	.put_super	= ceph_put_super,

fs/ceph/super.h

@@ -886,7 +886,6 @@ extern const struct inode_operations ceph_file_iops;
 extern struct inode *ceph_alloc_inode(struct super_block *sb);
 extern void ceph_evict_inode(struct inode *inode);
 extern void ceph_free_inode(struct inode *inode);
-extern int ceph_drop_inode(struct inode *inode);
 
 extern struct inode *ceph_get_inode(struct super_block *sb,
 				    struct ceph_vino vino);