system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-09-21 03:28:37 +00:00
Code Issues Packages Projects Releases Wiki Activity

powerpc: Silence software timebase sync

Browse source 
When no hardware method is provided to sync the timebase registers
across the machine, and the platform doesn't sync them for us, then we
use a generic software implementation.  Currently, the code for that
has many printks, and they don't have log levels.  Most of the printks
are only useful for debugging the code, and since we haven't had any
problems with it for years, this turns them into pr_debug.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2008-10-14 18:25:28 +00:00 committed by Paul Mackerras
parent 1fd0f52583
commit a6a8e009b1
1 changed files with 6 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
arch/powerpc/kernel/smp-tbsync.c
View file

@ -113,7 +113,7 @@ void __devinit smp_generic_give_timebase(void)
{
int i, score, score2, old, min=0, max=5000, offset=1000;
printk("Synchronizing timebase\n");
pr_debug("Software timebase sync\n");
/* if this fails then this kernel won't work anyway... */
tbsync = kzalloc( sizeof(*tbsync), GFP_KERNEL );
@ -123,13 +123,13 @@ void __devinit smp_generic_give_timebase(void)
while (!tbsync->ack)
barrier();
printk("Got ack\n");
pr_debug("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 );
pr_debug("score %d, offset %d\n", score, offset );
if( score > 0 )
max = offset;
@ -140,8 +140,8 @@ 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",
min, score, max, score2);
pr_debug("Min %d (score %d), Max %d (score %d)\n",
min, score, max, score2);
score = abs(score);
score2 = abs(score2);
offset = (score < score2) ? min : max;
@ -155,7 +155,7 @@ void __devinit smp_generic_give_timebase(void)
if (score2 <= score || score2 < 20)
break;
}
printk("Final offset: %d (%d/%d)\n", offset, score2, NUM_ITER );
pr_debug("Final offset: %d (%d/%d)\n", offset, score2, NUM_ITER );
/* exiting */
tbsync->cmd = kExit;