diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 915124011c27..c4b45673e9b8 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -147,7 +147,8 @@ raw_copy_to_user(void __user *dst, const void *src, unsigned long size)
 	return copy_user_generic((__force void *)dst, src, size);
 }
 
-extern long __copy_user_nocache(void *dst, const void __user *src, unsigned size);
+#define copy_to_nontemporal copy_to_nontemporal
+extern size_t copy_to_nontemporal(void *dst, const void *src, size_t size);
 extern long __copy_user_flushcache(void *dst, const void __user *src, unsigned size);
 
 static inline int
@@ -157,7 +158,7 @@ __copy_from_user_inatomic_nocache(void *dst, const void __user *src,
 	long ret;
 	kasan_check_write(dst, size);
 	stac();
-	ret = __copy_user_nocache(dst, src, size);
+	ret = copy_to_nontemporal(dst, (__force const void *)src, size);
 	clac();
 	return ret;
 }
diff --git a/arch/x86/lib/copy_user_uncached_64.S b/arch/x86/lib/copy_user_uncached_64.S
index 18350b343c2a..8ed0ce3ad227 100644
--- a/arch/x86/lib/copy_user_uncached_64.S
+++ b/arch/x86/lib/copy_user_uncached_64.S
@@ -27,7 +27,7 @@
  * Output:
  * rax uncopied bytes or 0 if successful.
  */
-SYM_FUNC_START(__copy_user_nocache)
+SYM_FUNC_START(copy_to_nontemporal)
 	ANNOTATE_NOENDBR
 	/* If destination is not 7-byte aligned, we'll have to align it */
 	testb $7,%dil
@@ -240,5 +240,5 @@ _ASM_EXTABLE_UA(95b, .Ldone)
 _ASM_EXTABLE_UA(52b, .Ldone0)
 _ASM_EXTABLE_UA(53b, .Ldone0)
 
-SYM_FUNC_END(__copy_user_nocache)
-EXPORT_SYMBOL(__copy_user_nocache)
+SYM_FUNC_END(copy_to_nontemporal)
+EXPORT_SYMBOL(copy_to_nontemporal)
diff --git a/arch/x86/lib/usercopy_64.c b/arch/x86/lib/usercopy_64.c
index 654280aaa3e9..348c9275edce 100644
--- a/arch/x86/lib/usercopy_64.c
+++ b/arch/x86/lib/usercopy_64.c
@@ -49,11 +49,11 @@ long __copy_user_flushcache(void *dst, const void __user *src, unsigned size)
 	long rc;
 
 	stac();
-	rc = __copy_user_nocache(dst, src, size);
+	rc = copy_to_nontemporal(dst, (__force const void *)src, size);
 	clac();
 
 	/*
-	 * __copy_user_nocache() uses non-temporal stores for the bulk
+	 * copy_to_nontemporal() uses non-temporal stores for the bulk
 	 * of the transfer, but we need to manually flush if the
 	 * transfer is unaligned. A cached memory copy is used when
 	 * destination or size is not naturally aligned. That is:
diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c
index 134a79eecfcb..3467797b5b01 100644
--- a/drivers/infiniband/sw/rdmavt/qp.c
+++ b/drivers/infiniband/sw/rdmavt/qp.c
@@ -92,12 +92,10 @@ static int rvt_wss_llc_size(void)
 static void cacheless_memcpy(void *dst, void *src, size_t n)
 {
 	/*
-	 * Use the only available X64 cacheless copy.  Add a __user cast
-	 * to quiet sparse.  The src agument is already in the kernel so
-	 * there are no security issues.  The extra fault recovery machinery
-	 * is not invoked.
+	 * Use the only available X64 cacheless copy.
+	 * The extra fault recovery machinery is not invoked.
 	 */
-	__copy_user_nocache(dst, (void __user *)src, n);
+	copy_to_nontemporal(dst, src, n);
 }
 
 void rvt_wss_exit(struct rvt_dev_info *rdi)
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 71d4bb25f7fd..21e1d238bc31 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1810,12 +1810,13 @@ static void ntb_tx_copy_callback(void *data,
 
 static void ntb_memcpy_tx(struct ntb_queue_entry *entry, void __iomem *offset)
 {
-#ifdef ARCH_HAS_NOCACHE_UACCESS
+#ifdef copy_to_nontemporal
 	/*
 	 * Using non-temporal mov to improve performance on non-cached
-	 * writes, even though we aren't actually copying from user space.
+	 * writes. This only works if __iomem is strictly memory-like,
+	 * but that is the case on x86-64
 	 */
-	__copy_from_user_inatomic_nocache(offset, entry->buf, entry->len);
+	copy_to_nontemporal(offset, entry->buf, entry->len);
 #else
 	memcpy_toio(offset, entry->buf, entry->len);
 #endif
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 3fd98c5b6e1a..8b15e263371e 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1260,7 +1260,7 @@ static const char *uaccess_safe_builtin[] = {
 	"copy_mc_enhanced_fast_string",
 	"rep_stos_alternative",
 	"rep_movs_alternative",
-	"__copy_user_nocache",
+	"copy_to_nontemporal",
 	NULL
 };