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authorAnton Arapov <anton@redhat.com>2012-06-21 08:44:47 +0200
committerAnton Arapov <anton@redhat.com>2012-06-21 08:44:47 +0200
commit35df99f47c4246df74ed7571c692138b83c3c486 (patch)
tree1f14dd15cf001e590e7f7406c8e594a0003fcff0 /arch/powerpc/kernel/time.c
parent8a6c6e11d3f0dcecf13668e33f5095b1fe9cb613 (diff)
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fedora kernel: 3d47c715a4a94b9d700c9e4ec1fc3a786bfde746v3.4.3-3
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/powerpc/kernel/time.c')
-rw-r--r--arch/powerpc/kernel/time.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 2c42cd72d0f..730e69cb7e9 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -474,6 +474,7 @@ void timer_interrupt(struct pt_regs * regs)
struct pt_regs *old_regs;
u64 *next_tb = &__get_cpu_var(decrementers_next_tb);
struct clock_event_device *evt = &__get_cpu_var(decrementers);
+ u64 now;
/* Ensure a positive value is written to the decrementer, or else
* some CPUs will continue to take decrementer exceptions.
@@ -508,9 +509,16 @@ void timer_interrupt(struct pt_regs * regs)
irq_work_run();
}
- *next_tb = ~(u64)0;
- if (evt->event_handler)
- evt->event_handler(evt);
+ now = get_tb_or_rtc();
+ if (now >= *next_tb) {
+ *next_tb = ~(u64)0;
+ if (evt->event_handler)
+ evt->event_handler(evt);
+ } else {
+ now = *next_tb - now;
+ if (now <= DECREMENTER_MAX)
+ set_dec((int)now);
+ }
#ifdef CONFIG_PPC64
/* collect purr register values often, for accurate calculations */