2 files changed, 3 insertions, 86 deletions
diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index c697cf10b7c8..59ea54af505e 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -81,10 +81,6 @@ __copy_from_user_flushcache(void *dst, const void __user *src, unsigned size)
 
 __must_check unsigned long
 clear_user_original(void __user *addr, unsigned long len);
-__must_check unsigned long
-clear_user_rep_good(void __user *addr, unsigned long len);
-__must_check unsigned long
-clear_user_erms(void __user *addr, unsigned long len);
 
 static __always_inline __must_check unsigned long __clear_user(void __user *addr, unsigned long size)
 {
@@ -97,16 +93,12 @@ static __always_inline __must_check unsigned long __clear_user(void __user *addr
 	 */
 	asm volatile(
 		"1:\n\t"
-		ALTERNATIVE_3("rep stosb",
-			      "call clear_user_erms",	  ALT_NOT(X86_FEATURE_FSRM),
-			      "call clear_user_rep_good", ALT_NOT(X86_FEATURE_ERMS),
-			      "call clear_user_original", ALT_NOT(X86_FEATURE_REP_GOOD))
+		ALTERNATIVE("rep stosb",
+			    "call clear_user_original", ALT_NOT(X86_FEATURE_FSRS))
 		"2:\n"
 	       _ASM_EXTABLE_UA(1b, 2b)
 	       : "+c" (size), "+D" (addr), ASM_CALL_CONSTRAINT
-	       : "a" (0)
-		/* rep_good clobbers %rdx */
-	       : "rdx");
+	       : "a" (0));
 
 	clac();
 
diff --git a/arch/x86/lib/clear_page_64.S b/arch/x86/lib/clear_page_64.S
index ecbfb4dd3b01..fcd01b9f8d50 100644
--- a/arch/x86/lib/clear_page_64.S
+++ b/arch/x86/lib/clear_page_64.S
@@ -113,78 +113,3 @@ SYM_FUNC_START(clear_user_original)
         _ASM_EXTABLE_UA(.Lbytes, .Lbytes_exception)
 SYM_FUNC_END(clear_user_original)
 EXPORT_SYMBOL(clear_user_original)
-
-/*
- * Alternative clear user-space when CPU feature X86_FEATURE_REP_GOOD is
- * present.
- * Input:
- * rdi destination
- * rcx count
- *
- * Output:
- * rcx: uncleared bytes or 0 if successful.
- */
-SYM_FUNC_START(clear_user_rep_good)
-	# call the original thing for less than a cacheline
-	cmp $64, %rcx
-	jb clear_user_original
-
-.Lprep:
-	# copy lower 32-bits for rest bytes
-	mov %ecx, %edx
-	shr $3, %rcx
-	jz .Lrep_good_rest_bytes
-
-.Lrep_good_qwords:
-	rep stosq
-
-.Lrep_good_rest_bytes:
-	and $7, %edx
-	jz .Lrep_good_exit
-
-.Lrep_good_bytes:
-	mov %edx, %ecx
-	rep stosb
-
-.Lrep_good_exit:
-	# see .Lexit comment above
-	xor %eax, %eax
-	RET
-
-.Lrep_good_qwords_exception:
-	# convert remaining qwords back into bytes to return to caller
-	shl $3, %rcx
-	and $7, %edx
-	add %rdx, %rcx
-	jmp .Lrep_good_exit
-
-	_ASM_EXTABLE_UA(.Lrep_good_qwords, .Lrep_good_qwords_exception)
-	_ASM_EXTABLE_UA(.Lrep_good_bytes, .Lrep_good_exit)
-SYM_FUNC_END(clear_user_rep_good)
-EXPORT_SYMBOL(clear_user_rep_good)
-
-/*
- * Alternative clear user-space when CPU feature X86_FEATURE_ERMS is present.
- * Input:
- * rdi destination
- * rcx count
- *
- * Output:
- * rcx: uncleared bytes or 0 if successful.
- *
- */
-SYM_FUNC_START(clear_user_erms)
-	# call the original thing for less than a cacheline
-	cmp $64, %rcx
-	jb clear_user_original
-
-.Lerms_bytes:
-	rep stosb
-
-.Lerms_exit:
-	xorl %eax,%eax
-	RET
-
-	_ASM_EXTABLE_UA(.Lerms_bytes, .Lerms_exit)
-SYM_FUNC_END(clear_user_erms)
-EXPORT_SYMBOL(clear_user_erms)