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Message-Id: <20150502185856.111992670@linuxfoundation.org>
Date: Sat, 2 May 2015 20:59:15 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Markos Chandras <markos.chandras@...tec.com>,
linux-mips@...ux-mips.org, Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH 4.0 040/220] MIPS: unaligned: Surround load/store macros in do {} while statements
4.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Markos Chandras <markos.chandras@...tec.com>
commit 3563c32d6532ece53c9dd8905a8e41983ef9952f upstream.
It's best to surround such complex macros with do {} while statements
so they can appear as independent logical blocks when used within other
control blocks.
Signed-off-by: Markos Chandras <markos.chandras@...tec.com>
Cc: linux-mips@...ux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9502/
Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
arch/mips/kernel/unaligned.c | 116 +++++++++++++++++++++++++++++++++----------
1 file changed, 90 insertions(+), 26 deletions(-)
--- a/arch/mips/kernel/unaligned.c
+++ b/arch/mips/kernel/unaligned.c
@@ -110,6 +110,7 @@ extern void show_registers(struct pt_reg
#ifdef __BIG_ENDIAN
#define _LoadHW(addr, value, res, type) \
+do { \
__asm__ __volatile__ (".set\tnoat\n" \
"1:\t"type##_lb("%0", "0(%2)")"\n" \
"2:\t"type##_lbu("$1", "1(%2)")"\n\t"\
@@ -127,10 +128,12 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
#ifndef CONFIG_CPU_MIPSR6
#define _LoadW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
"1:\t"type##_lwl("%0", "(%2)")"\n" \
"2:\t"type##_lwr("%0", "3(%2)")"\n\t"\
@@ -146,10 +149,13 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
+
#else
/* MIPSR6 has no lwl instruction */
#define _LoadW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n" \
".set\tnoat\n\t" \
@@ -178,10 +184,13 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t4b, 11b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
+
#endif /* CONFIG_CPU_MIPSR6 */
#define _LoadHWU(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tnoat\n" \
"1:\t"type##_lbu("%0", "0(%2)")"\n" \
@@ -201,10 +210,12 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
#ifndef CONFIG_CPU_MIPSR6
#define _LoadWU(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
"1:\t"type##_lwl("%0", "(%2)")"\n" \
"2:\t"type##_lwr("%0", "3(%2)")"\n\t"\
@@ -222,9 +233,11 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
#define _LoadDW(addr, value, res) \
+do { \
__asm__ __volatile__ ( \
"1:\tldl\t%0, (%2)\n" \
"2:\tldr\t%0, 7(%2)\n\t" \
@@ -240,10 +253,13 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
+
#else
/* MIPSR6 has not lwl and ldl instructions */
#define _LoadWU(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n\t" \
".set\tnoat\n\t" \
@@ -272,9 +288,11 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t4b, 11b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
#define _LoadDW(addr, value, res) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n\t" \
".set\tnoat\n\t" \
@@ -319,11 +337,14 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t8b, 11b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
+
#endif /* CONFIG_CPU_MIPSR6 */
#define _StoreHW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tnoat\n" \
"1:\t"type##_sb("%1", "1(%2)")"\n" \
@@ -342,10 +363,12 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=r" (res) \
- : "r" (value), "r" (addr), "i" (-EFAULT));
+ : "r" (value), "r" (addr), "i" (-EFAULT));\
+} while(0)
#ifndef CONFIG_CPU_MIPSR6
#define _StoreW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
"1:\t"type##_swl("%1", "(%2)")"\n" \
"2:\t"type##_swr("%1", "3(%2)")"\n\t"\
@@ -361,9 +384,11 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=r" (res) \
- : "r" (value), "r" (addr), "i" (-EFAULT));
+ : "r" (value), "r" (addr), "i" (-EFAULT)); \
+} while(0)
#define _StoreDW(addr, value, res) \
+do { \
__asm__ __volatile__ ( \
"1:\tsdl\t%1,(%2)\n" \
"2:\tsdr\t%1, 7(%2)\n\t" \
@@ -379,10 +404,13 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=r" (res) \
- : "r" (value), "r" (addr), "i" (-EFAULT));
+ : "r" (value), "r" (addr), "i" (-EFAULT)); \
+} while(0)
+
#else
/* MIPSR6 has no swl and sdl instructions */
#define _StoreW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n\t" \
".set\tnoat\n\t" \
@@ -409,9 +437,11 @@ extern void show_registers(struct pt_reg
".previous" \
: "=&r" (res) \
: "r" (value), "r" (addr), "i" (-EFAULT) \
- : "memory");
+ : "memory"); \
+} while(0)
#define StoreDW(addr, value, res) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n\t" \
".set\tnoat\n\t" \
@@ -451,12 +481,15 @@ extern void show_registers(struct pt_reg
".previous" \
: "=&r" (res) \
: "r" (value), "r" (addr), "i" (-EFAULT) \
- : "memory");
+ : "memory"); \
+} while(0)
+
#endif /* CONFIG_CPU_MIPSR6 */
#else /* __BIG_ENDIAN */
#define _LoadHW(addr, value, res, type) \
+do { \
__asm__ __volatile__ (".set\tnoat\n" \
"1:\t"type##_lb("%0", "1(%2)")"\n" \
"2:\t"type##_lbu("$1", "0(%2)")"\n\t"\
@@ -474,10 +507,12 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
#ifndef CONFIG_CPU_MIPSR6
#define _LoadW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
"1:\t"type##_lwl("%0", "3(%2)")"\n" \
"2:\t"type##_lwr("%0", "(%2)")"\n\t"\
@@ -493,10 +528,13 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
+
#else
/* MIPSR6 has no lwl instruction */
#define _LoadW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n" \
".set\tnoat\n\t" \
@@ -525,11 +563,14 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t4b, 11b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
+
#endif /* CONFIG_CPU_MIPSR6 */
#define _LoadHWU(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tnoat\n" \
"1:\t"type##_lbu("%0", "1(%2)")"\n" \
@@ -549,10 +590,12 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
#ifndef CONFIG_CPU_MIPSR6
#define _LoadWU(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
"1:\t"type##_lwl("%0", "3(%2)")"\n" \
"2:\t"type##_lwr("%0", "(%2)")"\n\t"\
@@ -570,9 +613,11 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
#define _LoadDW(addr, value, res) \
+do { \
__asm__ __volatile__ ( \
"1:\tldl\t%0, 7(%2)\n" \
"2:\tldr\t%0, (%2)\n\t" \
@@ -588,10 +633,13 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
+
#else
/* MIPSR6 has not lwl and ldl instructions */
#define _LoadWU(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n\t" \
".set\tnoat\n\t" \
@@ -620,9 +668,11 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t4b, 11b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
#define _LoadDW(addr, value, res) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n\t" \
".set\tnoat\n\t" \
@@ -667,10 +717,12 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t8b, 11b\n\t" \
".previous" \
: "=&r" (value), "=r" (res) \
- : "r" (addr), "i" (-EFAULT));
+ : "r" (addr), "i" (-EFAULT)); \
+} while(0)
#endif /* CONFIG_CPU_MIPSR6 */
#define _StoreHW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tnoat\n" \
"1:\t"type##_sb("%1", "0(%2)")"\n" \
@@ -689,9 +741,12 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=r" (res) \
- : "r" (value), "r" (addr), "i" (-EFAULT));
+ : "r" (value), "r" (addr), "i" (-EFAULT));\
+} while(0)
+
#ifndef CONFIG_CPU_MIPSR6
#define _StoreW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
"1:\t"type##_swl("%1", "3(%2)")"\n" \
"2:\t"type##_swr("%1", "(%2)")"\n\t"\
@@ -707,9 +762,11 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=r" (res) \
- : "r" (value), "r" (addr), "i" (-EFAULT));
+ : "r" (value), "r" (addr), "i" (-EFAULT)); \
+} while(0)
#define _StoreDW(addr, value, res) \
+do { \
__asm__ __volatile__ ( \
"1:\tsdl\t%1, 7(%2)\n" \
"2:\tsdr\t%1, (%2)\n\t" \
@@ -725,10 +782,13 @@ extern void show_registers(struct pt_reg
STR(PTR)"\t2b, 4b\n\t" \
".previous" \
: "=r" (res) \
- : "r" (value), "r" (addr), "i" (-EFAULT));
+ : "r" (value), "r" (addr), "i" (-EFAULT)); \
+} while(0)
+
#else
/* MIPSR6 has no swl and sdl instructions */
#define _StoreW(addr, value, res, type) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n\t" \
".set\tnoat\n\t" \
@@ -755,9 +815,11 @@ extern void show_registers(struct pt_reg
".previous" \
: "=&r" (res) \
: "r" (value), "r" (addr), "i" (-EFAULT) \
- : "memory");
+ : "memory"); \
+} while(0)
#define _StoreDW(addr, value, res) \
+do { \
__asm__ __volatile__ ( \
".set\tpush\n\t" \
".set\tnoat\n\t" \
@@ -797,7 +859,9 @@ extern void show_registers(struct pt_reg
".previous" \
: "=&r" (res) \
: "r" (value), "r" (addr), "i" (-EFAULT) \
- : "memory");
+ : "memory"); \
+} while(0)
+
#endif /* CONFIG_CPU_MIPSR6 */
#endif
--
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