linux-kernel - [PATCH 4.19 097/118] RISC-V: Fix raw_copy_{to,from}

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Message-Id: <20181126105105.592696262@linuxfoundation.org>
Date:   Mon, 26 Nov 2018 11:51:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Olof Johansson <olof@...om.net>,
        Palmer Dabbelt <palmer@...ive.com>
Subject: [PATCH 4.19 097/118] RISC-V: Fix raw_copy_{to,from}_user()

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Olof Johansson <olof@...om.net>

commit 21f70d4abf9e17c2e3d7e64b7bfa3424e017f176 upstream.

Sparse highlighted it, and appears to be a pure bug (from vs to).

./arch/riscv/include/asm/uaccess.h:403:35: warning: incorrect type in argument 1 (different address spaces)
./arch/riscv/include/asm/uaccess.h:403:39: warning: incorrect type in argument 2 (different address spaces)
./arch/riscv/include/asm/uaccess.h:409:37: warning: incorrect type in argument 1 (different address spaces)
./arch/riscv/include/asm/uaccess.h:409:41: warning: incorrect type in argument 2 (different address spaces)

Signed-off-by: Olof Johansson <olof@...om.net>
Cc: stable@...r.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@...ive.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/riscv/include/asm/uaccess.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/riscv/include/asm/uaccess.h
+++ b/arch/riscv/include/asm/uaccess.h
@@ -400,13 +400,13 @@ extern unsigned long __must_check __asm_
 static inline unsigned long
 raw_copy_from_user(void *to, const void __user *from, unsigned long n)
 {
-	return __asm_copy_to_user(to, from, n);
+	return __asm_copy_from_user(to, from, n);
 }
 
 static inline unsigned long
 raw_copy_to_user(void __user *to, const void *from, unsigned long n)
 {
-	return __asm_copy_from_user(to, from, n);
+	return __asm_copy_to_user(to, from, n);
 }
 
 extern long strncpy_from_user(char *dest, const char __user *src, long count);