Merge branch 'flock' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl

[pandora-kernel.git] / arch / sparc / lib / atomic32.c

diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c
index de84f85..cbddeb3 100644 (file)
--- a/arch/sparc/lib/atomic32.c
+++ b/arch/sparc/lib/atomic32.c
@@ -2,6 +2,7 @@
  * atomic32.c: 32-bit atomic_t implementation
  *
  * Copyright (C) 2004 Keith M Wesolowski
+ * Copyright (C) 2007 Kyle McMartin
  * 
  * Based on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf
  */
@@ -52,6 +53,7 @@ int atomic_cmpxchg(atomic_t *v, int old, int new)
        spin_unlock_irqrestore(ATOMIC_HASH(v), flags);
        return ret;
 }
+EXPORT_SYMBOL(atomic_cmpxchg);
 
 int atomic_add_unless(atomic_t *v, int a, int u)
 {
@@ -65,6 +67,7 @@ int atomic_add_unless(atomic_t *v, int a, int u)
        spin_unlock_irqrestore(ATOMIC_HASH(v), flags);
        return ret != u;
 }
+EXPORT_SYMBOL(atomic_add_unless);
 
 /* Atomic operations are already serializing */
 void atomic_set(atomic_t *v, int i)
@@ -76,3 +79,56 @@ void atomic_set(atomic_t *v, int i)
        spin_unlock_irqrestore(ATOMIC_HASH(v), flags);
 }
 EXPORT_SYMBOL(atomic_set);
+
+unsigned long ___set_bit(unsigned long *addr, unsigned long mask)
+{
+       unsigned long old, flags;
+
+       spin_lock_irqsave(ATOMIC_HASH(addr), flags);
+       old = *addr;
+       *addr = old | mask;
+       spin_unlock_irqrestore(ATOMIC_HASH(addr), flags);
+
+       return old & mask;
+}
+EXPORT_SYMBOL(___set_bit);
+
+unsigned long ___clear_bit(unsigned long *addr, unsigned long mask)
+{
+       unsigned long old, flags;
+
+       spin_lock_irqsave(ATOMIC_HASH(addr), flags);
+       old = *addr;
+       *addr = old & ~mask;
+       spin_unlock_irqrestore(ATOMIC_HASH(addr), flags);
+
+       return old & mask;
+}
+EXPORT_SYMBOL(___clear_bit);
+
+unsigned long ___change_bit(unsigned long *addr, unsigned long mask)
+{
+       unsigned long old, flags;
+
+       spin_lock_irqsave(ATOMIC_HASH(addr), flags);
+       old = *addr;
+       *addr = old ^ mask;
+       spin_unlock_irqrestore(ATOMIC_HASH(addr), flags);
+
+       return old & mask;
+}
+EXPORT_SYMBOL(___change_bit);
+
+unsigned long __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new)
+{
+       unsigned long flags;
+       u32 prev;
+
+       spin_lock_irqsave(ATOMIC_HASH(ptr), flags);
+       if ((prev = *ptr) == old)
+               *ptr = new;
+       spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags);
+
+       return (unsigned long)prev;
+}
+EXPORT_SYMBOL(__cmpxchg_u32);