[POWERPC][XEN] Quiet timebase synchronization at boot.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>

diff --git a/xen/arch/powerpc/smp-tbsync.c b/xen/arch/powerpc/smp-tbsync.c
index 052249a311bd11a2546ee59eda41e46b822b2a0f..c45278cc35393db5229da6d180ac230b7e86698a 100644 (file)
--- a/xen/arch/powerpc/smp-tbsync.c
+++ b/xen/arch/powerpc/smp-tbsync.c
@@ -32,6 +32,13 @@
 
 #define NUM_ITER               300
 
+#undef DEBUG
+#ifdef DEBUG
+#define DBG(fmt...) printk(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
 enum {
        kExit=0, kSetAndTest, kTest
 };
@@ -128,7 +135,7 @@ void __devinit smp_generic_give_timebase(void)
 {
        int i, score, score2, old, min=0, max=5000, offset=1000;
 
-       printk("Synchronizing timebase\n");
+       printk("Synchronizing timebase...\n");
 
        /* if this fails then this kernel won't work anyway... */
        tbsync = kmalloc( sizeof(*tbsync), GFP_KERNEL );
@@ -139,13 +146,13 @@ void __devinit smp_generic_give_timebase(void)
        while (!tbsync->ack)
                barrier();
 
-       printk("Got ack\n");
+       DBG("Got ack\n");
 
        /* binary search */
        for (old = -1; old != offset ; offset = (min+max) / 2) {
                score = start_contest(kSetAndTest, offset, NUM_ITER);
 
-               printk("score %d, offset %d\n", score, offset );
+               DBG("score %d, offset %d\n", score, offset );
 
                if( score > 0 )
                        max = offset;
@@ -156,7 +163,7 @@ void __devinit smp_generic_give_timebase(void)
        score = start_contest(kSetAndTest, min, NUM_ITER);
        score2 = start_contest(kSetAndTest, max, NUM_ITER);
 
-       printk("Min %d (score %d), Max %d (score %d)\n",
+       DBG("Min %d (score %d), Max %d (score %d)\n",
               min, score, max, score2);
        score = abs(score);
        score2 = abs(score2);
@@ -171,7 +178,7 @@ void __devinit smp_generic_give_timebase(void)
                if (score2 <= score || score2 < 20)
                        break;
        }
-       printk("Final offset: %d (%d/%d)\n", offset, score2, NUM_ITER );
+       DBG("Final offset: %d (%d/%d)\n", offset, score2, NUM_ITER );
 
        /* exiting */
        tbsync->cmd = kExit;