The pm_interval register in the Cell PMU is read/write, but was implemented in
the kernel as write-only. Previously, the written value was saved in a "shadow"
copy so calls to cbe_read_pm() could return the value.
Perfmon2 needs to be able to read the current values of pm_interval, so change
cbe_read_pm() to read the actual register instead of the "shadow" copy. There
is currently no code in the kernel that tries to read the pm_interval register
with cbe_read_pm() (expecting to receive the "shadow" value), so this should
not break any existing code.
Signed-off-by: Kevin Corry <[EMAIL PROTECTED]>
Signed-off-by: Carl Love <[EMAIL PROTECTED]>
Signed-off-by: Arnd Bergmann <[EMAIL PROTECTED]>
---
arch/powerpc/platforms/cell/pmu.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
Index: linux-2.6-new/arch/powerpc/platforms/cell/pmu.c
===================================================================
--- linux-2.6-new.orig/arch/powerpc/platforms/cell/pmu.c
+++ linux-2.6-new/arch/powerpc/platforms/cell/pmu.c
@@ -213,7 +213,7 @@ u32 cbe_read_pm(u32 cpu, enum pm_reg_nam
break;
case pm_interval:
- READ_SHADOW_REG(val, pm_interval);
+ READ_MMIO_UPPER32(val, pm_interval);
break;
case pm_start_stop:
--
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