VServer 1.9.2 (patch-2.6.8.1-vs1.9.2.diff)

[linux-2.6.git] / include / asm-i386 / spinlock.h

diff --git a/include/asm-i386/spinlock.h b/include/asm-i386/spinlock.h
index 8bd4f23..d6dbfd4 100644 (file)
--- a/include/asm-i386/spinlock.h
+++ b/include/asm-i386/spinlock.h
@@ -42,7 +42,6 @@ typedef struct {
 
 #define spin_is_locked(x)      (*(volatile signed char *)(&(x)->lock) <= 0)
 #define spin_unlock_wait(x)    do { barrier(); } while(spin_is_locked(x))
-#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
 
 #define spin_lock_string \
        "\n1:\t" \
@@ -56,6 +55,23 @@ typedef struct {
        "jmp 1b\n" \
        LOCK_SECTION_END
 
+#define spin_lock_string_flags \
+       "\n1:\t" \
+       "lock ; decb %0\n\t" \
+       "js 2f\n\t" \
+       LOCK_SECTION_START("") \
+       "2:\t" \
+       "testl $0x200, %1\n\t" \
+       "jz 3f\n\t" \
+       "sti\n\t" \
+       "3:\t" \
+       "rep;nop\n\t" \
+       "cmpb $0, %0\n\t" \
+       "jle 3b\n\t" \
+       "cli\n\t" \
+       "jmp 1b\n" \
+       LOCK_SECTION_END
+
 /*
  * This works. Despite all the confusion.
  * (except on PPro SMP or if we are using OOSTORE)
@@ -126,6 +142,20 @@ here:
                :"=m" (lock->lock) : : "memory");
 }
 
+static inline void _raw_spin_lock_flags (spinlock_t *lock, unsigned long flags)
+{
+#ifdef CONFIG_DEBUG_SPINLOCK
+       __label__ here;
+here:
+       if (unlikely(lock->magic != SPINLOCK_MAGIC)) {
+               printk("eip: %p\n", &&here);
+               BUG();
+       }
+#endif
+       __asm__ __volatile__(
+               spin_lock_string_flags
+               :"=m" (lock->lock) : "r" (flags) : "memory");
+}
 
 /*
  * Read-write spinlocks, allowing multiple readers