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authorHeiko Carstens <heiko.carstens@de.ibm.com>2008-04-17 07:46:25 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2008-04-17 07:47:05 +0200
commit5a62b192196af9a798e2f2f4c6a1324e7edf2f4b (patch)
tree0aa96ba3153b257000be22e49befbde2b5bd6917 /drivers/s390/cio/cio.c
parentd7b906897e9caae452947e33674df0a2d6f7e10f (diff)
downloadop-kernel-dev-5a62b192196af9a798e2f2f4c6a1324e7edf2f4b.zip
op-kernel-dev-5a62b192196af9a798e2f2f4c6a1324e7edf2f4b.tar.gz
[S390] Convert s390 to GENERIC_CLOCKEVENTS.
This way we get rid of s390's NO_IDLE_HZ and use the generic dynticks variant instead. In addition we get high resolution timers for free. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/cio.c')
-rw-r--r--drivers/s390/cio/cio.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 6dbe948..41db3cc 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -651,12 +651,9 @@ do_IRQ (struct pt_regs *regs)
old_regs = set_irq_regs(regs);
irq_enter();
s390_idle_check();
- if (S390_lowcore.int_clock >= S390_lowcore.jiffy_timer)
- /**
- * Make sure that the i/o interrupt did not "overtake"
- * the last HZ timer interrupt.
- */
- account_ticks(S390_lowcore.int_clock);
+ if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
+ /* Serve timer interrupts first. */
+ clock_comparator_work();
/*
* Get interrupt information from lowcore
*/
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