29 files changed, 190 insertions, 518 deletions

diff --git a/arch/sh/lib/Makefile b/arch/sh/lib/Makefile
index 7b95f29e3174..d20a0768b31f 100644
--- a/arch/sh/lib/Makefile
+++ b/arch/sh/lib/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for SuperH-specific library files..
 #
@@ -6,9 +7,7 @@ lib-y  = delay.o memmove.o memchr.o \
 	 checksum.o strlen.o div64.o div64-generic.o
 
 # Extracted from libgcc
-lib-y += movmem.o ashldi3.o ashrdi3.o lshrdi3.o \
-	 ashlsi3.o ashrsi3.o ashiftrt.o lshrsi3.o \
-	 udiv_qrnnd.o
+obj-y += movmem.o ashlsi3.o ashrsi3.o ashiftrt.o lshrsi3.o udiv_qrnnd.o
 
 udivsi3-y			:= udivsi3_i4i-Os.o
 
@@ -29,5 +28,3 @@ memset-$(CONFIG_CPU_SH4)	:= memset-sh4.o
 lib-$(CONFIG_MMU)		+= copy_page.o __clear_user.o
 lib-$(CONFIG_MCOUNT)		+= mcount.o
 lib-y				+= $(memcpy-y) $(memset-y) $(udivsi3-y)
-
-ccflags-y := -Werror
diff --git a/arch/sh/lib/__clear_user.S b/arch/sh/lib/__clear_user.S
index db1dca7aad14..0978606907ed 100644
--- a/arch/sh/lib/__clear_user.S
+++ b/arch/sh/lib/__clear_user.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * __clear_user_page, __clear_user, clear_page implementation of SuperH
  *
diff --git a/arch/sh/lib/ashiftrt.S b/arch/sh/lib/ashiftrt.S
index 45ce86558f46..0f7145e3c51e 100644
--- a/arch/sh/lib/ashiftrt.S
+++ b/arch/sh/lib/ashiftrt.S
@@ -1,30 +1,9 @@
-/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
+
+   Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
    2004, 2005, 2006
    Free Software Foundation, Inc.
-
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING.  If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+*/
 
 !! libgcc routines for the Renesas / SuperH SH CPUs.
 !! Contributed by Steve Chamberlain.
diff --git a/arch/sh/lib/ashldi3.c b/arch/sh/lib/ashldi3.c
deleted file mode 100644
index beb80f316095..000000000000
--- a/arch/sh/lib/ashldi3.c
+++ /dev/null
@@ -1,29 +0,0 @@
-#include <linux/module.h>
-
-#include "libgcc.h"
-
-long long __ashldi3(long long u, word_type b)
-{
-	DWunion uu, w;
-	word_type bm;
-
-	if (b == 0)
-		return u;
-
-	uu.ll = u;
-	bm = 32 - b;
-
-	if (bm <= 0) {
-		w.s.low = 0;
-		w.s.high = (unsigned int) uu.s.low << -bm;
-	} else {
-		const unsigned int carries = (unsigned int) uu.s.low >> bm;
-
-		w.s.low = (unsigned int) uu.s.low << b;
-		w.s.high = ((unsigned int) uu.s.high << b) | carries;
-	}
-
-	return w.ll;
-}
-
-EXPORT_SYMBOL(__ashldi3);
diff --git a/arch/sh/lib/ashlsi3.S b/arch/sh/lib/ashlsi3.S
index bd47e9b403a5..4df4401cdf31 100644
--- a/arch/sh/lib/ashlsi3.S
+++ b/arch/sh/lib/ashlsi3.S
@@ -1,30 +1,9 @@
-/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
+
+   Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
    2004, 2005, 2006
    Free Software Foundation, Inc.
-
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING.  If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+*/
 
 !! libgcc routines for the Renesas / SuperH SH CPUs.
 !! Contributed by Steve Chamberlain.
@@ -54,21 +33,38 @@ Boston, MA 02110-1301, USA.  */
 !
 ! (none)
 !
+! __ashlsi3_r0
+!
+! Entry:
+!
+! r4: Value to shift
+! r0: Shifts
+!
+! Exit:
+!
+! r0: Result
+!
+! Destroys:
+!
+! (none)
+
+
 	.global	__ashlsi3
+	.global	__ashlsi3_r0
 	
 	.align	2
 __ashlsi3:
-	mov	#31,r0
-	and	r0,r5
+	mov	r5,r0
+	.align	2
+__ashlsi3_r0:
+	and	#31,r0
+	mov.l	r4,@-r15
+	mov	r0,r4
 	mova	ashlsi3_table,r0
-	mov.b	@(r0,r5),r5
-#ifdef __sh1__
-	add	r5,r0
+	mov.b	@(r0,r4),r4
+	add	r4,r0
 	jmp	@r0
-#else
-	braf	r5
-#endif
-	mov	r4,r0
+	mov.l	@r15+,r0
 
 	.align	2
 ashlsi3_table:
diff --git a/arch/sh/lib/ashrdi3.c b/arch/sh/lib/ashrdi3.c
deleted file mode 100644
index c884a912b660..000000000000
--- a/arch/sh/lib/ashrdi3.c
+++ /dev/null
@@ -1,31 +0,0 @@
-#include <linux/module.h>
-
-#include "libgcc.h"
-
-long long __ashrdi3(long long u, word_type b)
-{
-	DWunion uu, w;
-	word_type bm;
-
-	if (b == 0)
-		return u;
-
-	uu.ll = u;
-	bm = 32 - b;
-
-	if (bm <= 0) {
-		/* w.s.high = 1..1 or 0..0 */
-		w.s.high =
-		    uu.s.high >> 31;
-		w.s.low = uu.s.high >> -bm;
-	} else {
-		const unsigned int carries = (unsigned int) uu.s.high << bm;
-
-		w.s.high = uu.s.high >> b;
-		w.s.low = ((unsigned int) uu.s.low >> b) | carries;
-	}
-
-	return w.ll;
-}
-
-EXPORT_SYMBOL(__ashrdi3);
diff --git a/arch/sh/lib/ashrsi3.S b/arch/sh/lib/ashrsi3.S
index 6f3cf46b77c2..bf3c4e03e6ff 100644
--- a/arch/sh/lib/ashrsi3.S
+++ b/arch/sh/lib/ashrsi3.S
@@ -1,30 +1,9 @@
-/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
+
+   Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
    2004, 2005, 2006
    Free Software Foundation, Inc.
-
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING.  If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+*/
 
 !! libgcc routines for the Renesas / SuperH SH CPUs.
 !! Contributed by Steve Chamberlain.
@@ -54,22 +33,37 @@ Boston, MA 02110-1301, USA.  */
 !
 ! (none)
 !
+! __ashrsi3_r0
+!
+! Entry:
+!
+! r4: Value to shift
+! r0: Shifts
+!
+! Exit:
+!
+! r0: Result
+!
+! Destroys:
+!
+! (none)
 
 	.global	__ashrsi3
+	.global	__ashrsi3_r0
 	
 	.align	2
 __ashrsi3:
-	mov	#31,r0
-	and	r0,r5
+	mov	r5,r0
+	.align	2
+__ashrsi3_r0:
+	and	#31,r0
+	mov.l	r4,@-r15
+	mov	r0,r4
 	mova	ashrsi3_table,r0
-	mov.b	@(r0,r5),r5
-#ifdef __sh1__
-	add	r5,r0
+	mov.b	@(r0,r4),r4
+	add	r4,r0
 	jmp	@r0
-#else
-	braf	r5
-#endif
-	mov	r4,r0
+	mov.l	@r15+,r0
 
 	.align	2
 ashrsi3_table:
diff --git a/arch/sh/lib/checksum.S b/arch/sh/lib/checksum.S
index 356c8ec92893..06fed5a21e8b 100644
--- a/arch/sh/lib/checksum.S
+++ b/arch/sh/lib/checksum.S
@@ -1,4 +1,6 @@
-/* $Id: checksum.S,v 1.10 2001/07/06 13:11:32 gniibe Exp $
+/* SPDX-License-Identifier: GPL-2.0+
+ *
+ * $Id: checksum.S,v 1.10 2001/07/06 13:11:32 gniibe Exp $
  *
  * INET		An implementation of the TCP/IP protocol suite for the LINUX
  *		operating system.  INET is implemented using the  BSD Socket
@@ -21,11 +23,6 @@
  *                   converted to pure assembler
  *
  * SuperH version:  Copyright (C) 1999  Niibe Yutaka
- *
- *		This program is free software; you can redistribute it and/or
- *		modify it under the terms of the GNU General Public License
- *		as published by the Free Software Foundation; either version
- *		2 of the License, or (at your option) any later version.
  */
 
 #include <asm/errno.h>
@@ -36,7 +33,8 @@
  */
 
 /*	
- * asmlinkage __wsum csum_partial(const void *buf, int len, __wsum sum);
+ * unsigned int csum_partial(const unsigned char *buf, int len,
+ *                           unsigned int sum);
  */
 
 .text
@@ -48,31 +46,11 @@ ENTRY(csum_partial)
 	   * Fortunately, it is easy to convert 2-byte alignment to 4-byte
 	   * alignment for the unrolled loop.
 	   */
+	mov	r5, r1
 	mov	r4, r0
-	tst	#3, r0		! Check alignment.
-	bt/s	2f		! Jump if alignment is ok.
-	 mov	r4, r7		! Keep a copy to check for alignment
+	tst	#2, r0		! Check alignment.
+	bt	2f		! Jump if alignment is ok.
 	!
-	tst	#1, r0		! Check alignment.
-	bt	21f		! Jump if alignment is boundary of 2bytes.
-
-	! buf is odd
-	tst	r5, r5
-	add	#-1, r5
-	bt	9f
-	mov.b	@r4+, r0
-	extu.b	r0, r0
-	addc	r0, r6		! t=0 from previous tst
-	mov	r6, r0
-	shll8	r6
-	shlr16	r0
-	shlr8	r0
-	or	r0, r6
-	mov	r4, r0
-	tst	#2, r0
-	bt	2f
-21:
-	! buf is 2 byte aligned (len could be 0)
 	add	#-2, r5		! Alignment uses up two bytes.
 	cmp/pz	r5		!
 	bt/s	1f		! Jump if we had at least two bytes.
@@ -80,17 +58,16 @@ ENTRY(csum_partial)
 	bra	6f
 	 add	#2, r5		! r5 was < 2.  Deal with it.
 1:
+	mov	r5, r1		! Save new len for later use.
 	mov.w	@r4+, r0
 	extu.w	r0, r0
 	addc	r0, r6
 	bf	2f
 	add	#1, r6
 2:
-	! buf is 4 byte aligned (len could be 0)
-	mov	r5, r1
 	mov	#-5, r0
-	shld	r0, r1
-	tst	r1, r1
+	shld	r0, r5
+	tst	r5, r5
 	bt/s	4f		! if it's =0, go to 4f
 	 clrt
 	.align	2
@@ -112,31 +89,30 @@ ENTRY(csum_partial)
 	addc	r0, r6
 	addc	r2, r6
 	movt	r0
-	dt	r1
+	dt	r5
 	bf/s	3b
 	 cmp/eq	#1, r0
-	! here, we know r1==0
-	addc	r1, r6			! add carry to r6
+	! here, we know r5==0
+	addc	r5, r6			! add carry to r6
 4:
-	mov	r5, r0
+	mov	r1, r0
 	and	#0x1c, r0
 	tst	r0, r0
-	bt	6f
-	! 4 bytes or more remaining
-	mov	r0, r1
-	shlr2	r1
+	bt/s	6f
+	 mov	r0, r5
+	shlr2	r5
 	mov	#0, r2
 5:
 	addc	r2, r6
 	mov.l	@r4+, r2
 	movt	r0
-	dt	r1
+	dt	r5
 	bf/s	5b
 	 cmp/eq	#1, r0
 	addc	r2, r6
-	addc	r1, r6		! r1==0 here, so it means add carry-bit
+	addc	r5, r6		! r5==0 here, so it means add carry-bit
 6:
-	! 3 bytes or less remaining
+	mov	r1, r5
 	mov	#3, r0
 	and	r0, r5
 	tst	r5, r5
@@ -162,61 +138,31 @@ ENTRY(csum_partial)
 	mov	#0, r0
 	addc	r0, r6
 9:
-	! Check if the buffer was misaligned, if so realign sum
-	mov	r7, r0
-	tst	#1, r0
-	bt	10f
-	mov	r6, r0
-	shll8	r6
-	shlr16	r0
-	shlr8	r0
-	or	r0, r6
-10:
 	rts
 	 mov	r6, r0
 
 /*
-unsigned int csum_partial_copy_generic (const char *src, char *dst, int len, 
-					int sum, int *src_err_ptr, int *dst_err_ptr)
+unsigned int csum_partial_copy_generic (const char *src, char *dst, int len)
  */ 
 
 /*
- * Copy from ds while checksumming, otherwise like csum_partial
- *
- * The macros SRC and DST specify the type of access for the instruction.
- * thus we can call a custom exception handler for all access types.
- *
- * FIXME: could someone double-check whether I haven't mixed up some SRC and
- *	  DST definitions? It's damn hard to trigger all cases.  I hope I got
- *	  them all but there's no guarantee.
+ * Copy from ds while checksumming, otherwise like csum_partial with initial
+ * sum being ~0U
  */
 
-#define SRC(...)			\
+#define EXC(...)			\
 	9999: __VA_ARGS__ ;		\
 	.section __ex_table, "a";	\
 	.long 9999b, 6001f	;	\
 	.previous
 
-#define DST(...)			\
-	9999: __VA_ARGS__ ;		\
-	.section __ex_table, "a";	\
-	.long 9999b, 6002f	;	\
-	.previous
-
 !
 ! r4:	const char *SRC
 ! r5:	char *DST
 ! r6:	int LEN
-! r7:	int SUM
-!
-! on stack:
-! int *SRC_ERR_PTR
-! int *DST_ERR_PTR
 !
 ENTRY(csum_partial_copy_generic)
-	mov.l	r5,@-r15
-	mov.l	r6,@-r15
-
+	mov	#-1,r7
 	mov	#3,r0		! Check src and dest are equally aligned
 	mov	r4,r1
 	and	r0,r1
@@ -246,11 +192,11 @@ ENTRY(csum_partial_copy_generic)
 	clrt
 	.align	2
 5:
-SRC(	mov.b	@r4+,r1 	)
-SRC(	mov.b	@r4+,r0		)
+EXC(	mov.b	@r4+,r1 	)
+EXC(	mov.b	@r4+,r0		)
 	extu.b	r1,r1
-DST(	mov.b	r1,@r5		)
-DST(	mov.b	r0,@(1,r5)	)
+EXC(	mov.b	r1,@r5		)
+EXC(	mov.b	r0,@(1,r5)	)
 	extu.b	r0,r0
 	add	#2,r5
 
@@ -279,8 +225,8 @@ DST(	mov.b	r0,@(1,r5)	)
 	! Handle first two bytes as a special case
 	.align	2
 1:	
-SRC(	mov.w	@r4+,r0		)
-DST(	mov.w	r0,@r5		)
+EXC(	mov.w	@r4+,r0		)
+EXC(	mov.w	r0,@r5		)
 	add	#2,r5
 	extu.w	r0,r0
 	addc	r0,r7
@@ -295,32 +241,32 @@ DST(	mov.w	r0,@r5		)
 	 clrt
 	.align	2
 1:	
-SRC(	mov.l	@r4+,r0		)
-SRC(	mov.l	@r4+,r1		)
+EXC(	mov.l	@r4+,r0		)
+EXC(	mov.l	@r4+,r1		)
 	addc	r0,r7
-DST(	mov.l	r0,@r5		)
-DST(	mov.l	r1,@(4,r5)	)
+EXC(	mov.l	r0,@r5		)
+EXC(	mov.l	r1,@(4,r5)	)
 	addc	r1,r7
 
-SRC(	mov.l	@r4+,r0		)
-SRC(	mov.l	@r4+,r1		)
+EXC(	mov.l	@r4+,r0		)
+EXC(	mov.l	@r4+,r1		)
 	addc	r0,r7
-DST(	mov.l	r0,@(8,r5)	)
-DST(	mov.l	r1,@(12,r5)	)
+EXC(	mov.l	r0,@(8,r5)	)
+EXC(	mov.l	r1,@(12,r5)	)
 	addc	r1,r7
 
-SRC(	mov.l	@r4+,r0 	)
-SRC(	mov.l	@r4+,r1		)
+EXC(	mov.l	@r4+,r0 	)
+EXC(	mov.l	@r4+,r1		)
 	addc	r0,r7
-DST(	mov.l	r0,@(16,r5)	)
-DST(	mov.l	r1,@(20,r5)	)
+EXC(	mov.l	r0,@(16,r5)	)
+EXC(	mov.l	r1,@(20,r5)	)
 	addc	r1,r7
 
-SRC(	mov.l	@r4+,r0		)
-SRC(	mov.l	@r4+,r1		)
+EXC(	mov.l	@r4+,r0		)
+EXC(	mov.l	@r4+,r1		)
 	addc	r0,r7
-DST(	mov.l	r0,@(24,r5)	)
-DST(	mov.l	r1,@(28,r5)	)
+EXC(	mov.l	r0,@(24,r5)	)
+EXC(	mov.l	r1,@(28,r5)	)
 	addc	r1,r7
 	add	#32,r5
 	movt	r0
@@ -338,9 +284,9 @@ DST(	mov.l	r1,@(28,r5)	)
 	 clrt
 	shlr2	r6
 3:	
-SRC(	mov.l	@r4+,r0	)
+EXC(	mov.l	@r4+,r0	)
 	addc	r0,r7
-DST(	mov.l	r0,@r5	)
+EXC(	mov.l	r0,@r5	)
 	add	#4,r5
 	movt	r0
 	dt	r6
@@ -356,8 +302,8 @@ DST(	mov.l	r0,@r5	)
 	mov	#2,r1
 	cmp/hs	r1,r6
 	bf	5f
-SRC(	mov.w	@r4+,r0	)
-DST(	mov.w	r0,@r5	)
+EXC(	mov.w	@r4+,r0	)
+EXC(	mov.w	r0,@r5	)
 	extu.w	r0,r0
 	add	#2,r5
 	cmp/eq	r1,r6
@@ -366,8 +312,8 @@ DST(	mov.w	r0,@r5	)
 	shll16	r0
 	addc	r0,r7
 5:	
-SRC(	mov.b	@r4+,r0	)
-DST(	mov.b	r0,@r5	)
+EXC(	mov.b	@r4+,r0	)
+EXC(	mov.b	r0,@r5	)
 	extu.b	r0,r0
 #ifndef	__LITTLE_ENDIAN__
 	shll8	r0
@@ -376,42 +322,13 @@ DST(	mov.b	r0,@r5	)
 	mov	#0,r0
 	addc	r0,r7
 7:
-5000:
 
 # Exception handler:
 .section .fixup, "ax"							
 
 6001:
-	mov.l	@(8,r15),r0			! src_err_ptr
-	mov	#-EFAULT,r1
-	mov.l	r1,@r0
-
-	! zero the complete destination - computing the rest
-	! is too much work 
-	mov.l	@(4,r15),r5		! dst
-	mov.l	@r15,r6			! len
-	mov	#0,r7
-1:	mov.b	r7,@r5
-	dt	r6
-	bf/s	1b
-	 add	#1,r5
-	mov.l	8000f,r0
-	jmp	@r0
-	 nop
-	.align	2
-8000:	.long	5000b
-
-6002:
-	mov.l	@(12,r15),r0			! dst_err_ptr
-	mov	#-EFAULT,r1
-	mov.l	r1,@r0
-	mov.l	8001f,r0
-	jmp	@r0
-	 nop
-	.align	2
-8001:	.long	5000b
-
+	rts
+	 mov	#0,r0
 .previous
-	add	#8,r15
 	rts
 	 mov	r7,r0
diff --git a/arch/sh/lib/copy_page.S b/arch/sh/lib/copy_page.S
index 9d7b8bc51866..d4e9d18cee0b 100644
--- a/arch/sh/lib/copy_page.S
+++ b/arch/sh/lib/copy_page.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * copy_page, __copy_user_page, __copy_user implementation of SuperH
  *
diff --git a/arch/sh/lib/delay.c b/arch/sh/lib/delay.c
index 0901b2f14e15..dad8e6a54906 100644
--- a/arch/sh/lib/delay.c
+++ b/arch/sh/lib/delay.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *	Precise Delay Loops for SuperH
  *
diff --git a/arch/sh/lib/div64-generic.c b/arch/sh/lib/div64-generic.c
index 60e76aa8b53e..0b67fbc44f6f 100644
--- a/arch/sh/lib/div64-generic.c
+++ b/arch/sh/lib/div64-generic.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Generic __div64_32 wrapper for __xdiv64_32.
  */
diff --git a/arch/sh/lib/div64.S b/arch/sh/lib/div64.S
index 5ee7334ea64f..4a9a966e71b0 100644
--- a/arch/sh/lib/div64.S
+++ b/arch/sh/lib/div64.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*	
  * unsigned long __xdiv64_32(unsigned long long n, unsigned long d); 
  */
diff --git a/arch/sh/lib/io.c b/arch/sh/lib/io.c
index 88dfe6e396bc..dc6345e4c53b 100644
--- a/arch/sh/lib/io.c
+++ b/arch/sh/lib/io.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * arch/sh/lib/io.c - SH32 optimized I/O routines
  *
@@ -6,15 +7,11 @@
  *
  * Provide real functions which expand to whatever the header file defined.
  * Also definitions of machine independent IO functions.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
  */
 #include <linux/module.h>
 #include <linux/io.h>
 
-void __raw_readsl(const void __iomem *addr, void *datap, int len)
+void __raw_readsl(const volatile void __iomem *addr, void *datap, int len)
 {
 	u32 *data;
 
@@ -63,7 +60,7 @@ void __raw_readsl(const void __iomem *addr, void *datap, int len)
 }
 EXPORT_SYMBOL(__raw_readsl);
 
-void __raw_writesl(void __iomem *addr, const void *data, int len)
+void __raw_writesl(volatile void __iomem *addr, const void *data, int len)
 {
 	if (likely(len != 0)) {
 		int tmp1;
diff --git a/arch/sh/lib/libgcc.h b/arch/sh/lib/libgcc.h
index 05909d58e2fe..58ada9e8f1c2 100644
--- a/arch/sh/lib/libgcc.h
+++ b/arch/sh/lib/libgcc.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
 #ifndef __ASM_LIBGCC_H
 #define __ASM_LIBGCC_H
 
diff --git a/arch/sh/lib/lshrdi3.c b/arch/sh/lib/lshrdi3.c
deleted file mode 100644
index dcf8d6810b7c..000000000000
--- a/arch/sh/lib/lshrdi3.c
+++ /dev/null
@@ -1,29 +0,0 @@
-#include <linux/module.h>
-
-#include "libgcc.h"
-
-long long __lshrdi3(long long u, word_type b)
-{
-	DWunion uu, w;
-	word_type bm;
-
-	if (b == 0)
-		return u;
-
-	uu.ll = u;
-	bm = 32 - b;
-
-	if (bm <= 0) {
-		w.s.high = 0;
-		w.s.low = (unsigned int) uu.s.high >> -bm;
-	} else {
-		const unsigned int carries = (unsigned int) uu.s.high << bm;
-
-		w.s.high = (unsigned int) uu.s.high >> b;
-		w.s.low = ((unsigned int) uu.s.low >> b) | carries;
-	}
-
-	return w.ll;
-}
-
-EXPORT_SYMBOL(__lshrdi3);
diff --git a/arch/sh/lib/lshrsi3.S b/arch/sh/lib/lshrsi3.S
index 1e7aaa557130..b79b8170061f 100644
--- a/arch/sh/lib/lshrsi3.S
+++ b/arch/sh/lib/lshrsi3.S
@@ -1,30 +1,9 @@
-/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
+
+   Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
    2004, 2005, 2006
    Free Software Foundation, Inc.
-
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING.  If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+*/
 
 !! libgcc routines for the Renesas / SuperH SH CPUs.
 !! Contributed by Steve Chamberlain.
@@ -54,21 +33,37 @@ Boston, MA 02110-1301, USA.  */
 !
 ! (none)
 !
+! __lshrsi3_r0
+!
+! Entry:
+!
+! r0: Value to shift
+! r5: Shifts
+!
+! Exit:
+!
+! r0: Result
+!
+! Destroys:
+!
+! (none)
+!
 	.global	__lshrsi3
+	.global	__lshrsi3_r0
 	
 	.align	2
 __lshrsi3:
-	mov	#31,r0
-	and	r0,r5
+	mov	r5,r0
+	.align	2
+__lshrsi3_r0:
+	and	#31,r0
+	mov.l	r4,@-r15
+	mov	r0,r4
 	mova	lshrsi3_table,r0
-	mov.b	@(r0,r5),r5
-#ifdef __sh1__
-	add	r5,r0
+	mov.b	@(r0,r4),r4
+	add	r4,r0
 	jmp	@r0
-#else
-	braf	r5
-#endif
-	mov	r4,r0
+	mov.l	@r15+,r0
 
 	.align	2
 lshrsi3_table:
diff --git a/arch/sh/lib/mcount.S b/arch/sh/lib/mcount.S
index 52aa2011d753..c6ca90cc9606 100644
--- a/arch/sh/lib/mcount.S
+++ b/arch/sh/lib/mcount.S
@@ -1,12 +1,9 @@
-/*
+/* SPDX-License-Identifier: GPL-2.0
+ *
  * arch/sh/lib/mcount.S
  *
  *  Copyright (C) 2008, 2009  Paul Mundt
  *  Copyright (C) 2008, 2009  Matt Fleming
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
  */
 #include <asm/ftrace.h>
 #include <asm/thread_info.h>
@@ -92,13 +89,6 @@ mcount:
 	rts
 	 nop
 #else
-#ifndef CONFIG_DYNAMIC_FTRACE
-	mov.l	.Lfunction_trace_stop, r0
-	mov.l	@r0, r0
-	tst	r0, r0
-	bf	ftrace_stub
-#endif
-
 	MCOUNT_ENTER()
 
 #ifdef CONFIG_DYNAMIC_FTRACE
@@ -174,11 +164,6 @@ ftrace_graph_call:
 
 	.globl ftrace_caller
 ftrace_caller:
-	mov.l	.Lfunction_trace_stop, r0
-	mov.l	@r0, r0
-	tst	r0, r0
-	bf	ftrace_stub
-
 	MCOUNT_ENTER()
 
 	.globl ftrace_call
@@ -196,8 +181,6 @@ ftrace_call:
 #endif /* CONFIG_DYNAMIC_FTRACE */
 
 	.align 2
-.Lfunction_trace_stop:
-	.long	function_trace_stop
 
 /*
  * NOTE: From here on the locations of the .Lftrace_stub label and
@@ -217,12 +200,7 @@ ftrace_stub:
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 	.globl	ftrace_graph_caller
 ftrace_graph_caller:
-	mov.l	2f, r0
-	mov.l	@r0, r0
-	tst	r0, r0
-	bt	1f
-
-	mov.l	3f, r1
+	mov.l	2f, r1
 	jmp	@r1
 	 nop
 1:
@@ -242,8 +220,7 @@ ftrace_graph_caller:
 	MCOUNT_LEAVE()
 
 	.align 2
-2:	.long	function_trace_stop
-3:	.long	skip_trace
+2:	.long	skip_trace
 .Lprepare_ftrace_return:
 	.long	prepare_ftrace_return
 
diff --git a/arch/sh/lib/memchr.S b/arch/sh/lib/memchr.S
index bc6036ad5706..8ded104077aa 100644
--- a/arch/sh/lib/memchr.S
+++ b/arch/sh/lib/memchr.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* $Id: memchr.S,v 1.1 2000/04/14 16:49:01 mjd Exp $
  *
  * "memchr" implementation of SuperH
diff --git a/arch/sh/lib/memcpy-sh4.S b/arch/sh/lib/memcpy-sh4.S
index 459fa92a7c53..a2435c0f6302 100644
--- a/arch/sh/lib/memcpy-sh4.S
+++ b/arch/sh/lib/memcpy-sh4.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * "memcpy" implementation of SuperH
  *
diff --git a/arch/sh/lib/memcpy.S b/arch/sh/lib/memcpy.S
index 232fab34c261..08ab3062c4b2 100644
--- a/arch/sh/lib/memcpy.S
+++ b/arch/sh/lib/memcpy.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* $Id: memcpy.S,v 1.3 2001/07/27 11:50:52 gniibe Exp $
  *
  * "memcpy" implementation of SuperH
diff --git a/arch/sh/lib/memmove.S b/arch/sh/lib/memmove.S
index 5a2211f09202..bdca321814a9 100644
--- a/arch/sh/lib/memmove.S
+++ b/arch/sh/lib/memmove.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* $Id: memmove.S,v 1.2 2001/07/27 11:51:09 gniibe Exp $
  *
  * "memmove" implementation of SuperH
diff --git a/arch/sh/lib/memset-sh4.S b/arch/sh/lib/memset-sh4.S
index 1a6e32cc4e4d..10649c4cdab8 100644
--- a/arch/sh/lib/memset-sh4.S
+++ b/arch/sh/lib/memset-sh4.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * "memset" implementation for SH4
  *
diff --git a/arch/sh/lib/memset.S b/arch/sh/lib/memset.S
index af91fe2b72a6..a6d5ec0bd9cf 100644
--- a/arch/sh/lib/memset.S
+++ b/arch/sh/lib/memset.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* $Id: memset.S,v 1.1 2000/04/14 16:49:01 mjd Exp $
  *
  * "memset" implementation of SuperH
diff --git a/arch/sh/lib/movmem.S b/arch/sh/lib/movmem.S
index 62075f6bc67c..8ac54d6b38a1 100644
--- a/arch/sh/lib/movmem.S
+++ b/arch/sh/lib/movmem.S
@@ -1,30 +1,9 @@
-/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
+
+   Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
    2004, 2005, 2006
    Free Software Foundation, Inc.
-
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING.  If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+*/
 
 !! libgcc routines for the Renesas / SuperH SH CPUs.
 !! Contributed by Steve Chamberlain.
diff --git a/arch/sh/lib/strlen.S b/arch/sh/lib/strlen.S
index 1bcc13f05962..80ea53dd34f6 100644
--- a/arch/sh/lib/strlen.S
+++ b/arch/sh/lib/strlen.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* $Id: strlen.S,v 1.2 2001/06/29 14:07:15 gniibe Exp $
  *
  * "strlen" implementation of SuperH
diff --git a/arch/sh/lib/udiv_qrnnd.S b/arch/sh/lib/udiv_qrnnd.S
index 32b9a36de943..28938daccd6b 100644
--- a/arch/sh/lib/udiv_qrnnd.S
+++ b/arch/sh/lib/udiv_qrnnd.S
@@ -1,30 +1,9 @@
-/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
+
+   Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
    2004, 2005, 2006
    Free Software Foundation, Inc.
-
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING.  If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+*/
 
 !! libgcc routines for the Renesas / SuperH SH CPUs.
 !! Contributed by Steve Chamberlain.
diff --git a/arch/sh/lib/udivsi3.S b/arch/sh/lib/udivsi3.S
index 72157ab5c314..09ed1f9deb2e 100644
--- a/arch/sh/lib/udivsi3.S
+++ b/arch/sh/lib/udivsi3.S
@@ -1,30 +1,9 @@
-/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
+
+   Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
    2004, 2005
    Free Software Foundation, Inc.
-
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING.  If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+*/
 
 !! libgcc routines for the Renesas / SuperH SH CPUs.
 !! Contributed by Steve Chamberlain.
diff --git a/arch/sh/lib/udivsi3_i4i-Os.S b/arch/sh/lib/udivsi3_i4i-Os.S
index 4835553e1ea9..fa4e4dff3da1 100644
--- a/arch/sh/lib/udivsi3_i4i-Os.S
+++ b/arch/sh/lib/udivsi3_i4i-Os.S
@@ -1,28 +1,7 @@
-/* Copyright (C) 2006 Free Software Foundation, Inc.
-
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING.  If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
+ *
+ * Copyright (C) 2006 Free Software Foundation, Inc.
+ */
 
 /* Moderately Space-optimized libgcc routines for the Renesas SH /
    STMicroelectronics ST40 CPUs.
diff --git a/arch/sh/lib/udivsi3_i4i.S b/arch/sh/lib/udivsi3_i4i.S
index f1a79d9c5015..6944eb6b4a75 100644
--- a/arch/sh/lib/udivsi3_i4i.S
+++ b/arch/sh/lib/udivsi3_i4i.S
@@ -1,30 +1,9 @@
-/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0
+
+   Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
    2004, 2005, 2006
    Free Software Foundation, Inc.
-
-This file is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
-This file is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file COPYING.  If not, write to
-the Free Software Foundation, 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+*/
 
 !! libgcc routines for the Renesas / SuperH SH CPUs.
 !! Contributed by Steve Chamberlain.