Add cpu_relax() to drivers/ide/ide-iops.c/ide_wait_stat().
Tiny whitespace fix.
Should be quite useful.
Tested on 2.6.17-mm1.
Signed-off-by: Andreas Mohr <andi@xxxxxxxx>
diff -urN linux-2.6.17-mm1.orig/drivers/ide/ide-iops.c linux-2.6.17-mm1.my/drivers/ide/ide-iops.c
--- linux-2.6.17-mm1.orig/drivers/ide/ide-iops.c 2006-06-21 14:28:16.000000000 +0200
+++ linux-2.6.17-mm1.my/drivers/ide/ide-iops.c 2006-06-21 22:00:02.000000000 +0200
@@ -542,7 +542,7 @@
u8 stat;
int i;
unsigned long flags;
-
+
/* bail early if we've exceeded max_failures */
if (drive->max_failures && (drive->failures > drive->max_failures)) {
*startstop = ide_stopped;
@@ -554,6 +554,7 @@
local_irq_set(flags);
timeout += jiffies;
while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
+ cpu_relax();
if (time_after(jiffies, timeout)) {
/*
* One last read after the timeout in case
-
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