From: Qing Zhang <zhangqing@loongson.cn>
Date: Sat, 6 Aug 2022 07:19:32 +0000 (+0800)
Subject: LoongArch: Requires __force attributes for any casts
X-Git-Tag: v6.6.17~6797^2~11
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5e8be07ca8f7f49d49c6d5d44f69caaa2fa4b660;p=platform%2Fkernel%2Flinux-rpi.git

LoongArch: Requires __force attributes for any casts

This fix a warning when "make C=2":
arch/loongarch/kernel/ptrace.c: note: in included file (through include/linux/uaccess.h, include/linux/sched/task.h, include/linux/sched/signal.h, include/linux/ptrace.h, include/linux/audit.h):
./arch/loongarch/include/asm/uaccess.h:232:32: warning: incorrect type in argument 2 (different address spaces)
./arch/loongarch/include/asm/uaccess.h:232:32:    expected void const *from
./arch/loongarch/include/asm/uaccess.h:232:32:    got void const [noderef] __user *from

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---

diff --git a/arch/loongarch/include/asm/uaccess.h b/arch/loongarch/include/asm/uaccess.h
index 2b44edc..a8ae2af 100644
--- a/arch/loongarch/include/asm/uaccess.h
+++ b/arch/loongarch/include/asm/uaccess.h
@@ -229,13 +229,13 @@ extern unsigned long __copy_user(void *to, const void *from, __kernel_size_t n);
 static inline unsigned long __must_check
 raw_copy_from_user(void *to, const void __user *from, unsigned long n)
 {
-	return __copy_user(to, from, n);
+	return __copy_user(to, (__force const void *)from, n);
 }
 
 static inline unsigned long __must_check
 raw_copy_to_user(void __user *to, const void *from, unsigned long n)
 {
-	return __copy_user(to, from, n);
+	return __copy_user((__force void *)to, from, n);
 }
 
 #define INLINE_COPY_FROM_USER