linux-kernel - [PATCH v2 2/3] powerpc/uaccess: Merge __put_user_size_allowed() into __put_user

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Message-Id: <b3baeaec1ee2fbdc653bb6fb27b0be5b846163ef.1612879284.git.christophe.leroy@csgroup.eu>
Date:   Tue,  9 Feb 2021 14:02:13 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 2/3] powerpc/uaccess: Merge __put_user_size_allowed() into
 __put_user_size()

__put_user_size_allowed() is only called from __put_user_size() now.

Merge them together.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/include/asm/uaccess.h | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index a4d2569173ac..2fb1d95f10d3 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -108,22 +108,18 @@ static inline bool __access_ok(unsigned long addr, unsigned long size)
 
 extern long __put_user_bad(void);
 
-#define __put_user_size_allowed(x, ptr, size, retval)		\
+#define __put_user_size(x, ptr, size, retval)			\
 do {								\
 	__label__ __pu_failed;					\
 								\
 	retval = 0;						\
+	allow_write_to_user(ptr, size);				\
 	__put_user_size_goto(x, ptr, size, __pu_failed);	\
+	prevent_write_to_user(ptr, size);			\
 	break;							\
 								\
 __pu_failed:							\
 	retval = -EFAULT;					\
-} while (0)
-
-#define __put_user_size(x, ptr, size, retval)			\
-do {								\
-	allow_write_to_user(ptr, size);				\
-	__put_user_size_allowed(x, ptr, size, retval);		\
 	prevent_write_to_user(ptr, size);			\
 } while (0)
 
-- 
2.25.0