[POWERPC] 83xx: Add default config file for Wind River SBC8349 board

[linux-2.6] / include / asm-ia64 / bitops.h

diff --git a/include/asm-ia64/bitops.h b/include/asm-ia64/bitops.h
index 2144f1a8ed6f7f89793858c9cab1d4f73b37be95..a1b9719f5fbb7ba11071a92ddcd611e6945e2c2e 100644 (file)
--- a/include/asm-ia64/bitops.h
+++ b/include/asm-ia64/bitops.h
@@ -9,6 +9,10 @@
  * O(1) scheduler patch
  */
 
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
 #include <linux/compiler.h>
 #include <linux/types.h>
 #include <asm/intrinsics.h>
@@ -120,10 +124,21 @@ clear_bit_unlock (int nr, volatile void *addr)
 /**
  * __clear_bit_unlock - Non-atomically clear a bit with release
  *
- * This is like clear_bit_unlock, but the implementation may use a non-atomic
- * store (this one uses an atomic, however).
+ * This is like clear_bit_unlock, but the implementation uses a store
+ * with release semantics. See also __raw_spin_unlock().
  */
-#define __clear_bit_unlock clear_bit_unlock
+static __inline__ void
+__clear_bit_unlock(int nr, volatile void *addr)
+{
+       __u32 mask, new;
+       volatile __u32 *m;
+
+       m = (volatile __u32 *)addr + (nr >> 5);
+       mask = ~(1 << (nr & 31));
+       new = *m & mask;
+       barrier();
+       ia64_st4_rel_nta(m, new);
+}
 
 /**
  * __clear_bit - Clears a bit in memory (non-atomic version)