Remove use of d_materialise_unique

This is no longer used. We always d_splice_alias.

Signed-off-by: Auke Kok <auke.kok@versity.com>

kmod/src/Makefile.kernelcompat

@@ -6,16 +6,6 @@
 
 ccflags-y += -include $(src)/kernelcompat.h
 
-#
-# v3.18-rc2-19-gb5ae6b15bd73
-# 
-# Folds d_materialise_unique into d_splice_alias. Note reversal
-# of arguments (Also note Documentation/filesystems/porting.rst)
-#
-ifneq (,$(shell grep 'd_materialise_unique' include/linux/dcache.h))
-ccflags-y += -DKC_D_MATERIALISE_UNIQUE=1
-endif
-
 #
 # RHEL extended the fop struct so to use it we have to set
 # a flag to indicate that the struct is large enough and

kmod/src/dir.c

@@ -422,18 +422,7 @@ out:
 	else
 		inode = scoutfs_iget(sb, ino, 0, 0);
 
-	/*
-	 * We can't splice dir aliases into the dcache.  dir entries
-	 * might have changed on other nodes so our dcache could still
-	 * contain them, rather than having been moved in rename.  For
-	 * dirs, we use d_materialize_unique to remove any existing
-	 * aliases which must be stale.  Our inode numbers aren't reused
-	 * so inodes pointed to by entries can't change types.
-	 */
-	if (!IS_ERR_OR_NULL(inode) && S_ISDIR(inode->i_mode))
-		return d_materialise_unique(dentry, inode);
-	else
-		return d_splice_alias(inode, dentry);
+	return d_splice_alias(inode, dentry);
 }
 
 /*

kmod/src/kernelcompat.h

@@ -45,16 +45,6 @@ do {						\
 #define WQ_NON_REENTRANT 0
 #endif
 
-/*
- * v3.18-rc2-19-gb5ae6b15bd73
- *
- * Folds d_materialise_unique into d_splice_alias. Note reversal
- * of arguments (Also note Documentation/filesystems/porting.rst)
- */
-#ifndef KC_D_MATERIALISE_UNIQUE
-#define d_materialise_unique(dentry, inode) d_splice_alias(inode, dentry)
-#endif
-
 /*
  * v4.8-rc1-29-g31051c85b5e2
  *