aboutsummaryrefslogtreecommitdiff
path: root/arch/s390/lib
diff options
context:
space:
mode:
authorHeiko Carstens <heiko.carstens@de.ibm.com>2008-10-10 21:33:22 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-10-10 21:33:58 +0200
commit5a0d0e65379256b4da2c9092e197a2c761f51c01 (patch)
tree4dbac2b5498ad7ce1bd88d8bdfe6303169b9560c /arch/s390/lib
parentb2300b9efe1b8174833e17f37e975c9da00c388a (diff)
downloadlinux-linaro-android-5a0d0e65379256b4da2c9092e197a2c761f51c01.tar.gz
[S390] Move private simple udelay function to arch/s390/lib/delay.c.
Move cio's private simple udelay function to lib/delay.c and turn it into something much more readable. So we have all implementations at one place. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/lib')
-rw-r--r--arch/s390/lib/delay.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c
index 0953cee05ef..6ccb9fab055 100644
--- a/arch/s390/lib/delay.c
+++ b/arch/s390/lib/delay.c
@@ -92,3 +92,16 @@ out:
local_irq_restore(flags);
preempt_enable();
}
+
+/*
+ * Simple udelay variant. To be used on startup and reboot
+ * when the interrupt handler isn't working.
+ */
+void udelay_simple(unsigned long usecs)
+{
+ u64 end;
+
+ end = get_clock() + ((u64) usecs << 12);
+ while (get_clock() < end)
+ cpu_relax();
+}