}
#endif /* HAVE_TRUNCATE_SETSIZE */
+#if defined(HAVE_BDI) && !defined(HAVE_BDI_SETUP_AND_REGISTER)
/*
- * 2.6.32 API change,
- * Added backing_device_info (bdi) per super block interfaces. When
- * available a bdi must be configured when using a non-device backed
- * filesystem for proper writeback. It's safe to leave this code
- * dormant for kernels which only support pdflush and not bdi.
+ * 2.6.34 API change,
+ * Add bdi_setup_and_register() function if not yet provided by kernel.
+ * It is used to quickly initialize and register a BDI for the filesystem.
*/
-#ifdef HAVE_BDI
-#define bdi_get_sb(sb) (sb->s_bdi)
-#define bdi_put_sb(sb, bdi) (sb->s_bdi = bdi)
-#else
-#define bdi_init(bdi) (0)
-#define bdi_destroy(bdi) (0)
-#define bdi_register(bdi, parent, fmt, args) (0)
-#define bdi_unregister(bdi) (0)
-#define bdi_get_sb(sb) (0)
-#define bdi_put_sb(sb, bdi) (0)
-#endif /* HAVE_BDI */
+extern atomic_long_t zfs_bdi_seq;
+
+static inline int
+bdi_setup_and_register(struct backing_dev_info *bdi,char *name,unsigned int cap)
+{
+ char tmp[32];
+ int error;
+
+ bdi->name = name;
+ bdi->capabilities = cap;
+ error = bdi_init(bdi);
+ if (error)
+ return (error);
+
+ sprintf(tmp, "%.28s%s", name, "-%d");
+ error = bdi_register(bdi, NULL, tmp,
+ atomic_long_inc_return(&zfs_bdi_seq));
+ if (error) {
+ bdi_destroy(bdi);
+ return (error);
+ }
+
+ return (error);
+}
+#endif /* HAVE_BDI && !HAVE_BDI_SETUP_AND_REGISTER */
+
+/*
+ * 3.2-rc1 API change,
+ * Add set_nlink() if it is not exported by the Linux kernel.
+ *
+ * i_nlink is read-only in Linux 3.2, but it can be set directly in
+ * earlier kernels.
+ */
+#ifndef HAVE_SET_NLINK
+static inline void
+set_nlink(struct inode *inode, unsigned int nlink)
+{
+ inode->i_nlink = nlink;
+}
+#endif /* HAVE_SET_NLINK */
#endif /* _ZFS_VFS_H */