Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=29641c...
Commit: 29641ce165e5f643b48988cb779c6ba97b647503
Parent: 7ee17466b6ac3b63ce87492d080e15e7f144f7d2
Author: Kevin Corry <kevcorry@us.ibm.com>
AuthorDate: Tue Dec 11 13:49:17 2007 +0100
Committer: Arnd Bergmann <arnd@arndb.de>
CommitDate: Wed Dec 19 01:00:01 2007 +0100
[POWERPC] perfmon2: make pm_interval register read/write
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 <kevcorry@us.ibm.com>
Signed-off-by: Carl Love <carll@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/powerpc/platforms/cell/pmu.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/platforms/cell/pmu.c b/arch/powerpc/platforms/cell/pmu.c
index 1ed3036..99d688e 100644
--- a/arch/powerpc/platforms/cell/pmu.c
+++ b/arch/powerpc/platforms/cell/pmu.c
@@ -213,7 +213,7 @@ u32 cbe_read_pm(u32 cpu, enum pm_reg_name reg)
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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