linux-kernel - [PATCH 3/3] powerpc/uaccess: Remove __put_user_asm() and __put_user

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Message-Id: <d66c4a372738d2fbd81f433ca86e4295871ace6a.1599216721.git.christophe.leroy@csgroup.eu>
Date:   Fri,  4 Sep 2020 11:01:32 +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 3/3] powerpc/uaccess: Remove __put_user_asm() and
 __put_user_asm2()

__put_user_asm() and __put_user_asm2() are not used anymore.

Remove them.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/include/asm/uaccess.h | 41 ++++--------------------------
 1 file changed, 5 insertions(+), 36 deletions(-)

diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index 96d1c144f92b..26781b044932 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -151,42 +151,6 @@ static inline int __access_ok(unsigned long addr, unsigned long size,
 
 extern long __put_user_bad(void);
 
-/*
- * We don't tell gcc that we are accessing memory, but this is OK
- * because we do not write to any memory gcc knows about, so there
- * are no aliasing issues.
- */
-#define __put_user_asm(x, addr, err, op)			\
-	__asm__ __volatile__(					\
-		"1:	" op "%U2%X2 %1,%2	# put_user\n"	\
-		"2:\n"						\
-		".section .fixup,\"ax\"\n"			\
-		"3:	li %0,%3\n"				\
-		"	b 2b\n"					\
-		".previous\n"					\
-		EX_TABLE(1b, 3b)				\
-		: "=r" (err)					\
-		: "r" (x), "m<>" (*addr), "i" (-EFAULT), "0" (err))
-
-#ifdef __powerpc64__
-#define __put_user_asm2(x, ptr, retval)				\
-	  __put_user_asm(x, ptr, retval, "std")
-#else /* __powerpc64__ */
-#define __put_user_asm2(x, addr, err)				\
-	__asm__ __volatile__(					\
-		"1:	stw%X2 %1,%2\n"			\
-		"2:	stw%X2 %L1,%L2\n"			\
-		"3:\n"						\
-		".section .fixup,\"ax\"\n"			\
-		"4:	li %0,%3\n"				\
-		"	b 3b\n"					\
-		".previous\n"					\
-		EX_TABLE(1b, 4b)				\
-		EX_TABLE(2b, 4b)				\
-		: "=r" (err)					\
-		: "r" (x), "m" (*addr), "i" (-EFAULT), "0" (err))
-#endif /* __powerpc64__ */
-
 #define __put_user_size_allowed(x, ptr, size, retval)		\
 do {								\
 	__label__ __pu_failed;					\
@@ -249,6 +213,11 @@ do {								\
 })
 
 
+/*
+ * We don't tell gcc that we are accessing memory, but this is OK
+ * because we do not write to any memory gcc knows about, so there
+ * are no aliasing issues.
+ */
 #define __put_user_asm_goto(x, addr, label, op)			\
 	asm volatile goto(					\
 		"1:	" op "%U1%X1 %0,%1	# put_user\n"	\
-- 
2.25.0