--- zzzz-none-000/linux-2.4.17/include/asm-mips/atomic.h	2001-09-09 17:43:01.000000000 +0000
+++ sangam-fb-322/linux-2.4.17/include/asm-mips/atomic.h	2004-11-24 13:21:33.000000000 +0000
@@ -228,7 +228,7 @@
  * other cases.  Note that the guaranteed
  * useful range of an atomic_t is only 24 bits.
  */
-#define atomic_inc_and_test(v) (atomic_inc_return(1, (v)) == 0)
+#define atomic_inc_and_test(v) (atomic_inc_return((v)) == 0)
 
 /*
  * atomic_dec_and_test - decrement by 1 and test
@@ -269,9 +269,10 @@
  * result is greater than or equal to zero.  Note that the guaranteed
  * useful range of an atomic_t is only 24 bits.
  *
- * Currently not implemented for MIPS.
  */
 
+#define atomic_add_negative(i,v) (atomic_add_return((i), (v)) < 0)
+
 /* Atomic operations are already serializing */
 #define smp_mb__before_atomic_dec()	barrier()
 #define smp_mb__after_atomic_dec()	barrier()