x86: spinlock_32/64 substitute types and instructions

Use _slock_t for the spinlock data types and replace the instructions
by string defines, which makes the code of 32/64 bit versions more
or less identical.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/include/asm-x86/spinlock_32.h b/include/asm-x86/spinlock_32.h
index 4ef626d53682ee6c39dc54ab66e54c2bc35d3449..2de9b8b899039db683655c1eb5aad0ec2223ee8d 100644 (file)
--- a/include/asm-x86/spinlock_32.h
+++ b/include/asm-x86/spinlock_32.h
@@ -17,20 +17,27 @@
  * (the type definitions are in asm/spinlock_types.h)
  */
 
+typedef char _slock_t;
+#define LOCK_INS_DEC "decb"
+#define LOCK_INS_XCH "xchgb"
+#define LOCK_INS_MOV "movb"
+#define LOCK_INS_CMP "cmpb"
+#define LOCK_PTR_REG "a"
+
 static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
 {
-       return *(volatile signed char *)(&(lock)->slock) <= 0;
+       return *(volatile _slock_t *)(&(lock)->slock) <= 0;
 }
 
 static inline void __raw_spin_lock(raw_spinlock_t *lock)
 {
        asm volatile(
                "\n1:\t"
-               LOCK_PREFIX " ; decb %0\n\t"
+               LOCK_PREFIX " ; " LOCK_INS_DEC " %0\n\t"
                "jns 3f\n"
                "2:\t"
                "rep;nop\n\t"
-               "cmpb $0,%0\n\t"
+               LOCK_INS_CMP " $0,%0\n\t"
                "jle 2b\n\t"
                "jmp 1b\n"
                "3:\n\t"
@@ -51,25 +58,25 @@ static inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
 {
        asm volatile(
                "\n1:\t"
-               LOCK_PREFIX " ; decb %[slock]\n\t"
+               LOCK_PREFIX " ; " LOCK_INS_DEC " %[slock]\n\t"
                "jns 5f\n"
                "testl $0x200, %[flags]\n\t"
                "jz 4f\n\t"
                STI_STRING "\n"
                "3:\t"
                "rep;nop\n\t"
-               "cmpb $0, %[slock]\n\t"
+               LOCK_INS_CMP " $0, %[slock]\n\t"
                "jle 3b\n\t"
                CLI_STRING "\n\t"
                "jmp 1b\n"
                "4:\t"
                "rep;nop\n\t"
-               "cmpb $0, %[slock]\n\t"
+               LOCK_INS_CMP " $0, %[slock]\n\t"
                "jg 1b\n\t"
                "jmp 4b\n"
                "5:\n\t"
                : [slock] "+m" (lock->slock)
-               : [flags] "r" (flags)
+               : [flags] "r" ((u32)flags)
                  CLI_STI_INPUT_ARGS
                : "memory" CLI_STI_CLOBBERS);
 }
@@ -77,10 +84,10 @@ static inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
 
 static inline int __raw_spin_trylock(raw_spinlock_t *lock)
 {
-       signed char oldval;
+       _slock_t oldval;
 
        asm volatile(
-               "xchgb %b0,%1"
+               LOCK_INS_XCH " %0,%1"
                :"=q" (oldval), "+m" (lock->slock)
                :"0" (0) : "memory");
 
@@ -98,7 +105,7 @@ static inline int __raw_spin_trylock(raw_spinlock_t *lock)
 
 static inline void __raw_spin_unlock(raw_spinlock_t *lock)
 {
-       asm volatile("movb $1,%0" : "=m" (lock->slock) :: "memory");
+       asm volatile(LOCK_INS_MOV " $1,%0" : "=m" (lock->slock) :: "memory");
 }
 
 #else
@@ -150,7 +157,7 @@ static inline void __raw_read_lock(raw_rwlock_t *rw)
                     "jns 1f\n"
                     "call __read_lock_failed\n\t"
                     "1:\n"
-                    ::"a" (rw) : "memory");
+                    ::LOCK_PTR_REG (rw) : "memory");
 }
 
 static inline void __raw_write_lock(raw_rwlock_t *rw)
@@ -159,7 +166,7 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
                     "jz 1f\n"
                     "call __write_lock_failed\n\t"
                     "1:\n"
-                    ::"a" (rw), "i" (RW_LOCK_BIAS) : "memory");
+                    ::LOCK_PTR_REG (rw), "i" (RW_LOCK_BIAS) : "memory");
 }
 
 static inline int __raw_read_trylock(raw_rwlock_t *lock)

diff --git a/include/asm-x86/spinlock_64.h b/include/asm-x86/spinlock_64.h
index 19d483c80185ac7aa68836be616f716c6bea907e..f5ba90b7335c9126054f95238a9dfb68bd46b493 100644 (file)
--- a/include/asm-x86/spinlock_64.h
+++ b/include/asm-x86/spinlock_64.h
@@ -17,20 +17,27 @@
  * (the type definitions are in asm/spinlock_types.h)
  */
 
+typedef int _slock_t;
+#define LOCK_INS_DEC "decl"
+#define LOCK_INS_XCH "xchgl"
+#define LOCK_INS_MOV "movl"
+#define LOCK_INS_CMP "cmpl"
+#define LOCK_PTR_REG "D"
+
 static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
 {
-       return *(volatile signed int *)(&(lock)->slock) <= 0;
+       return *(volatile _slock_t *)(&(lock)->slock) <= 0;
 }
 
 static inline void __raw_spin_lock(raw_spinlock_t *lock)
 {
        asm volatile(
                "\n1:\t"
-               LOCK_PREFIX " ; decl %0\n\t"
+               LOCK_PREFIX " ; " LOCK_INS_DEC " %0\n\t"
                "jns 3f\n"
                "2:\t"
                "rep;nop\n\t"
-               "cmpl $0,%0\n\t"
+               LOCK_INS_CMP " $0,%0\n\t"
                "jle 2b\n\t"
                "jmp 1b\n"
                "3:\n\t"
@@ -51,25 +58,25 @@ static inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
 {
        asm volatile(
                "\n1:\t"
-               LOCK_PREFIX " ; decl %[slock]\n\t"
+               LOCK_PREFIX " ; " LOCK_INS_DEC " %[slock]\n\t"
                "jns 5f\n"
                "testl $0x200, %[flags]\n\t"
                "jz 4f\n\t"
                STI_STRING "\n"
                "3:\t"
                "rep;nop\n\t"
-               "cmpl $0, %[slock]\n\t"
+               LOCK_INS_CMP " $0, %[slock]\n\t"
                "jle 3b\n\t"
                CLI_STRING "\n\t"
                "jmp 1b\n"
                "4:\t"
                "rep;nop\n\t"
-               "cmpl $0, %[slock]\n\t"
+               LOCK_INS_CMP " $0, %[slock]\n\t"
                "jg 1b\n\t"
                "jmp 4b\n"
                "5:\n\t"
                : [slock] "+m" (lock->slock)
-               : [flags] "r" ((unsigned)flags)
+               : [flags] "r" ((u32)flags)
                  CLI_STI_INPUT_ARGS
                : "memory" CLI_STI_CLOBBERS);
 }
@@ -77,10 +84,10 @@ static inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
 
 static inline int __raw_spin_trylock(raw_spinlock_t *lock)
 {
-       int oldval;
+       _slock_t oldval;
 
        asm volatile(
-               "xchgl %0,%1"
+               LOCK_INS_XCH " %0,%1"
                :"=q" (oldval), "+m" (lock->slock)
                :"0" (0) : "memory");
 
@@ -89,7 +96,7 @@ static inline int __raw_spin_trylock(raw_spinlock_t *lock)
 
 static inline void __raw_spin_unlock(raw_spinlock_t *lock)
 {
-       asm volatile("movl $1,%0" : "=m" (lock->slock) :: "memory");
+       asm volatile(LOCK_INS_MOV " $1,%0" : "=m" (lock->slock) :: "memory");
 }
 
 static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
@@ -128,7 +135,7 @@ static inline void __raw_read_lock(raw_rwlock_t *rw)
                     "jns 1f\n"
                     "call __read_lock_failed\n\t"
                     "1:\n"
-                    ::"D" (rw) : "memory");
+                    ::LOCK_PTR_REG (rw) : "memory");
 }
 
 static inline void __raw_write_lock(raw_rwlock_t *rw)
@@ -137,7 +144,7 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
                     "jz 1f\n"
                     "call __write_lock_failed\n\t"
                     "1:\n"
-                    ::"D" (rw), "i" (RW_LOCK_BIAS) : "memory");
+                    ::LOCK_PTR_REG (rw), "i" (RW_LOCK_BIAS) : "memory");
 }
 
 static inline int __raw_read_trylock(raw_rwlock_t *lock)