[POWERPC] perfmon2: make pm_interval register read/write

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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>

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Kevin Corry 2007-12-11 13:49:17 +01:00 • committed by Arnd Bergmann

parent 7ee17466b6

commit 29641ce165

1 changed files with 1 additions and 1 deletions

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arch/powerpc/platforms/cell/pmu.c

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