[PACKET]: Fix sparse warnings in af_packet.c

[linux-2.6] / arch / s390 / lib / spinlock.c

diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c
index 59c56c3d72d08a265d79090f87a4b1de87a997fd..e41f4008afc501927a5c3b08fda18891c1afc887 100644 (file)
--- a/arch/s390/lib/spinlock.c
+++ b/arch/s390/lib/spinlock.c
@@ -59,6 +59,29 @@ void _raw_spin_lock_wait(raw_spinlock_t *lp)
 }
 EXPORT_SYMBOL(_raw_spin_lock_wait);
 
+void _raw_spin_lock_wait_flags(raw_spinlock_t *lp, unsigned long flags)
+{
+       int count = spin_retry;
+       unsigned int cpu = ~smp_processor_id();
+
+       local_irq_restore(flags);
+       while (1) {
+               if (count-- <= 0) {
+                       unsigned int owner = lp->owner_cpu;
+                       if (owner != 0)
+                               _raw_yield_cpu(~owner);
+                       count = spin_retry;
+               }
+               if (__raw_spin_is_locked(lp))
+                       continue;
+               local_irq_disable();
+               if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0)
+                       return;
+               local_irq_restore(flags);
+       }
+}
+EXPORT_SYMBOL(_raw_spin_lock_wait_flags);
+
 int _raw_spin_trylock_retry(raw_spinlock_t *lp)
 {
        unsigned int cpu = ~smp_processor_id();