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>

1 files changed, 19 insertions, 12 deletions

diff --git a/include/asm-x86/spinlock_32.h b/include/asm-x86/spinlock_32.h
index 4ef626d53682..2de9b8b89903 100644
--- 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)