From: Max Filippov <jcmvbkbc@gmail.com>
Date: Tue, 4 Apr 2017 20:26:29 +0000 (-0700)
Subject: xtensa: fix prefetch in the raw_copy_to_user
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7d4914db8fda6d38d92b1b8a740bafbd6c6d89a1;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

xtensa: fix prefetch in the raw_copy_to_user

'from' is the input buffer, it should be prefetched with prefetch, not
prefetchw.

Tested-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
index 8e93ed8ad1fe..2e7bac0d4b2c 100644
--- a/arch/xtensa/include/asm/uaccess.h
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -245,7 +245,7 @@ raw_copy_from_user(void *to, const void __user *from, unsigned long n)
 static inline unsigned long
 raw_copy_to_user(void __user *to, const void *from, unsigned long n)
 {
-	prefetchw(from);
+	prefetch(from);
 	return __xtensa_copy_user((__force void *)to, from, n);
 }
 #define INLINE_COPY_FROM_USER