diff --git a/config/kernel-kmem-cache.m4 b/config/kernel-kmem-cache.m4
deleted file mode 100644
index 0e9fe9eb2a90..000000000000
--- a/config/kernel-kmem-cache.m4
+++ /dev/null
@@ -1,41 +0,0 @@
-dnl #
-dnl # grsecurity API change,
-dnl # kmem_cache_create() with SLAB_USERCOPY flag replaced by
-dnl # kmem_cache_create_usercopy().
-dnl #
-AC_DEFUN([ZFS_AC_KERNEL_SRC_KMEM_CACHE_CREATE_USERCOPY], [
-	ZFS_LINUX_TEST_SRC([kmem_cache_create_usercopy], [
-		#include <linux/slab.h>
-		static void ctor(void *foo) { /* fake ctor */ }
-	],[
-		struct kmem_cache *skc_linux_cache;
-		const char *name = "test";
-		size_t size = 4096;
-		size_t align = 8;
-		unsigned long flags = 0;
-		size_t useroffset = 0;
-		size_t usersize = size - useroffset;
-
-		skc_linux_cache = kmem_cache_create_usercopy(
-		    name, size, align, flags, useroffset, usersize, ctor);
-	])
-])
-
-AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE_CREATE_USERCOPY], [
-	AC_MSG_CHECKING([whether kmem_cache_create_usercopy() exists])
-	ZFS_LINUX_TEST_RESULT([kmem_cache_create_usercopy], [
-		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_KMEM_CACHE_CREATE_USERCOPY, 1,
-		    [kmem_cache_create_usercopy() exists])
-	],[
-		AC_MSG_RESULT(no)
-	])
-])
-
-AC_DEFUN([ZFS_AC_KERNEL_SRC_KMEM_CACHE], [
-	ZFS_AC_KERNEL_SRC_KMEM_CACHE_CREATE_USERCOPY
-])
-
-AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE], [
-	ZFS_AC_KERNEL_KMEM_CACHE_CREATE_USERCOPY
-])
diff --git a/config/kernel.m4 b/config/kernel.m4
index eaaa70228c64..51459d487677 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -45,7 +45,6 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
 	ZFS_AC_KERNEL_SRC_GENERIC_FADVISE
 	ZFS_AC_KERNEL_SRC_SCHED
 	ZFS_AC_KERNEL_SRC_USLEEP_RANGE
-	ZFS_AC_KERNEL_SRC_KMEM_CACHE
 	ZFS_AC_KERNEL_SRC_KVMALLOC
 	ZFS_AC_KERNEL_SRC_VMALLOC_PAGE_KERNEL
 	ZFS_AC_KERNEL_SRC_WAIT
@@ -163,7 +162,6 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
 	ZFS_AC_KERNEL_GENERIC_FADVISE
 	ZFS_AC_KERNEL_SCHED
 	ZFS_AC_KERNEL_USLEEP_RANGE
-	ZFS_AC_KERNEL_KMEM_CACHE
 	ZFS_AC_KERNEL_KVMALLOC
 	ZFS_AC_KERNEL_VMALLOC_PAGE_KERNEL
 	ZFS_AC_KERNEL_WAIT
diff --git a/module/os/linux/spl/spl-kmem-cache.c b/module/os/linux/spl/spl-kmem-cache.c
index 7596f97b4984..7e806bd5699c 100644
--- a/module/os/linux/spl/spl-kmem-cache.c
+++ b/module/os/linux/spl/spl-kmem-cache.c
@@ -786,25 +786,8 @@ spl_kmem_cache_create(const char *name, size_t size, size_t align,
 		if (skc->skc_flags & KMC_RECLAIMABLE)
 			slabflags |= SLAB_RECLAIM_ACCOUNT;
 
-#if defined(SLAB_USERCOPY)
-		/*
-		 * Required for PAX-enabled kernels if the slab is to be
-		 * used for copying between user and kernel space.
-		 */
-		slabflags |= SLAB_USERCOPY;
-#endif
-
-#if defined(HAVE_KMEM_CACHE_CREATE_USERCOPY)
-		/*
-		 * Newer grsec patchset uses kmem_cache_create_usercopy()
-		 * instead of SLAB_USERCOPY flag
-		 */
 		skc->skc_linux_cache = kmem_cache_create_usercopy(
 		    skc->skc_name, size, align, slabflags, 0, size, NULL);
-#else
-		skc->skc_linux_cache = kmem_cache_create(
-		    skc->skc_name, size, align, slabflags, NULL);
-#endif
 		if (skc->skc_linux_cache == NULL)
 			goto out;
 	}