1 files changed, 22 insertions, 32 deletions

diff --git a/arch/arm64/lib/copy_page.S b/arch/arm64/lib/copy_page.S
index bbb8562396af..6a56d7cf309d 100644
--- a/arch/arm64/lib/copy_page.S
+++ b/arch/arm64/lib/copy_page.S
@@ -17,14 +17,7 @@
  *	x0 - dest
  *	x1 - src
  */
-ENTRY(copy_page)
-alternative_if ARM64_HAS_NO_HW_PREFETCH
-	// Prefetch three cache lines ahead.
-	prfm	pldl1strm, [x1, #128]
-	prfm	pldl1strm, [x1, #256]
-	prfm	pldl1strm, [x1, #384]
-alternative_else_nop_endif
-
+SYM_FUNC_START(__pi_copy_page)
 	ldp	x2, x3, [x1]
 	ldp	x4, x5, [x1, #16]
 	ldp	x6, x7, [x1, #32]
@@ -34,46 +27,43 @@ alternative_else_nop_endif
 	ldp	x14, x15, [x1, #96]
 	ldp	x16, x17, [x1, #112]
 
-	mov	x18, #(PAGE_SIZE - 128)
+	add	x0, x0, #256
 	add	x1, x1, #128
 1:
-	subs	x18, x18, #128
-
-alternative_if ARM64_HAS_NO_HW_PREFETCH
-	prfm	pldl1strm, [x1, #384]
-alternative_else_nop_endif
+	tst	x0, #(PAGE_SIZE - 1)
 
-	stnp	x2, x3, [x0]
+	stnp	x2, x3, [x0, #-256]
 	ldp	x2, x3, [x1]
-	stnp	x4, x5, [x0, #16]
+	stnp	x4, x5, [x0, #16 - 256]
 	ldp	x4, x5, [x1, #16]
-	stnp	x6, x7, [x0, #32]
+	stnp	x6, x7, [x0, #32 - 256]
 	ldp	x6, x7, [x1, #32]
-	stnp	x8, x9, [x0, #48]
+	stnp	x8, x9, [x0, #48 - 256]
 	ldp	x8, x9, [x1, #48]
-	stnp	x10, x11, [x0, #64]
+	stnp	x10, x11, [x0, #64 - 256]
 	ldp	x10, x11, [x1, #64]
-	stnp	x12, x13, [x0, #80]
+	stnp	x12, x13, [x0, #80 - 256]
 	ldp	x12, x13, [x1, #80]
-	stnp	x14, x15, [x0, #96]
+	stnp	x14, x15, [x0, #96 - 256]
 	ldp	x14, x15, [x1, #96]
-	stnp	x16, x17, [x0, #112]
+	stnp	x16, x17, [x0, #112 - 256]
 	ldp	x16, x17, [x1, #112]
 
 	add	x0, x0, #128
 	add	x1, x1, #128
 
-	b.gt	1b
+	b.ne	1b
 
-	stnp	x2, x3, [x0]
-	stnp	x4, x5, [x0, #16]
-	stnp	x6, x7, [x0, #32]
-	stnp	x8, x9, [x0, #48]
-	stnp	x10, x11, [x0, #64]
-	stnp	x12, x13, [x0, #80]
-	stnp	x14, x15, [x0, #96]
-	stnp	x16, x17, [x0, #112]
+	stnp	x2, x3, [x0, #-256]
+	stnp	x4, x5, [x0, #16 - 256]
+	stnp	x6, x7, [x0, #32 - 256]
+	stnp	x8, x9, [x0, #48 - 256]
+	stnp	x10, x11, [x0, #64 - 256]
+	stnp	x12, x13, [x0, #80 - 256]
+	stnp	x14, x15, [x0, #96 - 256]
+	stnp	x16, x17, [x0, #112 - 256]
 
 	ret
-ENDPROC(copy_page)
+SYM_FUNC_END(__pi_copy_page)
+SYM_FUNC_ALIAS(copy_page, __pi_copy_page)
 EXPORT_SYMBOL(copy_page)