diff --git a/config/kernel-dentry-operations.m4 b/config/kernel-dentry-operations.m4
index a36421167..87f5c92fb 100644
--- a/config/kernel-dentry-operations.m4
+++ b/config/kernel-dentry-operations.m4
@@ -20,31 +20,6 @@ AC_DEFUN([ZFS_AC_KERNEL_D_OBTAIN_ALIAS], [
 	])
 ])
 
-dnl #
-dnl # 2.6.12 API change
-dnl # d_prune_aliases() helper function available.
-dnl #
-AC_DEFUN([ZFS_AC_KERNEL_SRC_D_PRUNE_ALIASES], [
-	ZFS_LINUX_TEST_SRC([d_prune_aliases], [
-		#include <linux/dcache.h>
-	], [
-		struct inode *ip = NULL;
-		d_prune_aliases(ip);
-	])
-])
-
-AC_DEFUN([ZFS_AC_KERNEL_D_PRUNE_ALIASES], [
-	AC_MSG_CHECKING([whether d_prune_aliases() is available])
-	ZFS_LINUX_TEST_RESULT_SYMBOL([d_prune_aliases],
-	    [d_prune_aliases], [fs/dcache.c], [
-		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_D_PRUNE_ALIASES, 1,
-		    [d_prune_aliases() is available])
-	], [
-		ZFS_LINUX_TEST_ERROR([d_prune_aliases()])
-	])
-])
-
 dnl #
 dnl # 2.6.38 API change
 dnl # Added d_set_d_op() helper function.
@@ -120,7 +95,6 @@ AC_DEFUN([ZFS_AC_KERNEL_S_D_OP], [
 
 AC_DEFUN([ZFS_AC_KERNEL_SRC_DENTRY], [
         ZFS_AC_KERNEL_SRC_D_OBTAIN_ALIAS
-        ZFS_AC_KERNEL_SRC_D_PRUNE_ALIASES
         ZFS_AC_KERNEL_SRC_D_SET_D_OP
         ZFS_AC_KERNEL_SRC_D_REVALIDATE_NAMEIDATA
         ZFS_AC_KERNEL_SRC_S_D_OP
@@ -128,7 +102,6 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_DENTRY], [
 
 AC_DEFUN([ZFS_AC_KERNEL_DENTRY], [
         ZFS_AC_KERNEL_D_OBTAIN_ALIAS
-        ZFS_AC_KERNEL_D_PRUNE_ALIASES
         ZFS_AC_KERNEL_D_SET_D_OP
         ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
         ZFS_AC_KERNEL_S_D_OP
diff --git a/module/os/linux/zfs/zfs_vfsops.c b/module/os/linux/zfs/zfs_vfsops.c
index 22a4ad1ef..98b820e74 100644
--- a/module/os/linux/zfs/zfs_vfsops.c
+++ b/module/os/linux/zfs/zfs_vfsops.c
@@ -1290,14 +1290,11 @@ zfs_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects)
 	*objects = (*shrinker->scan_objects)(shrinker, &sc);
 #elif defined(HAVE_SINGLE_SHRINKER_CALLBACK)
 	*objects = (*shrinker->shrink)(shrinker, &sc);
-#elif defined(HAVE_D_PRUNE_ALIASES)
 #define	D_PRUNE_ALIASES_IS_DEFAULT
 	*objects = zfs_prune_aliases(zfsvfs, nr_to_scan);
-#else
-#error "No available dentry and inode cache pruning mechanism."
 #endif
 
-#if defined(HAVE_D_PRUNE_ALIASES) && !defined(D_PRUNE_ALIASES_IS_DEFAULT)
+#ifndef D_PRUNE_ALIASES_IS_DEFAULT
 #undef	D_PRUNE_ALIASES_IS_DEFAULT
 	/*
 	 * Fall back to zfs_prune_aliases if the kernel's per-superblock