+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
+#define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
+#define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path)
+#else
+#define ll_set_dflags(dentry, flags) do { \
+ spin_lock(&dentry->d_lock); \
+ dentry->d_flags |= flags; \
+ spin_unlock(&dentry->d_lock); \
+ } while(0)
+#define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path, mode)
+#endif
+
+#ifdef HAVE_I_ALLOC_SEM
+#define UP_WRITE_I_ALLOC_SEM(i) do { up_write(&(i)->i_alloc_sem); } while (0)
+#define DOWN_WRITE_I_ALLOC_SEM(i) do { down_write(&(i)->i_alloc_sem); } while(0)
+#define LASSERT_MDS_ORPHAN_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
+
+#define UP_READ_I_ALLOC_SEM(i) do { up_read(&(i)->i_alloc_sem); } while (0)
+#define DOWN_READ_I_ALLOC_SEM(i) do { down_read(&(i)->i_alloc_sem); } while (0)
+#define LASSERT_MDS_ORPHAN_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
+#define MDS_PACK_MD_LOCK 1
+#else
+#define UP_READ_I_ALLOC_SEM(i) do { up(&(i)->i_sem); } while (0)
+#define DOWN_READ_I_ALLOC_SEM(i) do { down(&(i)->i_sem); } while (0)
+#define LASSERT_MDS_ORPHAN_READ_LOCKED(i) LASSERT(down_trylock(&(i)->i_sem) != 0)
+
+#define UP_WRITE_I_ALLOC_SEM(i) do { up(&(i)->i_sem); } while (0)
+#define DOWN_WRITE_I_ALLOC_SEM(i) do { down(&(i)->i_sem); } while (0)
+#define LASSERT_MDS_ORPHAN_WRITE_LOCKED(i) LASSERT(down_trylock(&(i)->i_sem) != 0)
+#define MDS_PACK_MD_LOCK 0
+#endif
+