bitkeeper revision 1.1159.1.320 (4186495166A8XLekEbNixl7hWUA08w)

Clean up softirq handling. All debug keypresses are now deferred to
a softirq handler.

1 files changed, 5 insertions, 11 deletions

diff --git a/xen/common/softirq.c b/xen/common/softirq.c
index 3e1472e94a..166a8163c1 100644
--- a/xen/common/softirq.c
+++ b/xen/common/softirq.c
@@ -21,19 +21,13 @@ static softirq_handler softirq_handlers[NR_SOFTIRQS] __cacheline_aligned;
 
 asmlinkage void do_softirq()
 {
-    unsigned int pending, cpu = smp_processor_id();
-    softirq_handler *h;
+    unsigned int i, pending, cpu = smp_processor_id();
 
-    while ( (pending = xchg(&softirq_pending(cpu), 0)) != 0 )
+    while ( (pending = softirq_pending(cpu)) != 0 )
     {
-        h = softirq_handlers;
-        while ( pending )
-        {
-            if ( pending & 1 )
-                (*h)();
-            h++;
-            pending >>= 1;
-        }
+        i = find_first_set_bit(pending);
+        clear_bit(i, &softirq_pending(cpu));
+        (*softirq_handlers[i])();
     }
 }