kernel.git/arch/arm/oprofile, branch linux-2.6.37.y

ARM: oprofile: Fix backtraces in timer mode

2011-02-17T23:15:10Z

commit d14dd7e20d5e526557f5d3cfef4046a642f80924 upstream. Always allow backtraces when using oprofile on ARM, even if a PMU isn't present. Restores functionality originally introduced in commit 1b7b56982fdcd9d85effd76f3928cf5d6eb26155 ("oprofile: Always allow backtraces on ARM") by Richard Purdie. It is not that obvious, but there is now only one oprofile_arch_init() function. So the .backtrace callback is available also in timer mode. Implemented by removing code and using stubs for oprofile_perf_{init, exit} provided by . This allows cleaning of other architecture specific implementations too. Signed-off-by: Ari Kauppi Acked-by: Will Deacon Signed-off-by: Robert Richter Signed-off-by: Greg Kroah-Hartman

oprofile: Abstract the perf-events backend

2010-10-11T15:46:16Z

Move the perf-events backend from arch/arm/oprofile into drivers/oprofile so that the code can be shared between architectures. This allows each architecture to maintain only a single copy of the PMU accessor functions instead of one for both perf and OProfile. It also becomes possible for other architectures to delete much of their OProfile code in favour of the common code now available in drivers/oprofile/oprofile_perf.c. Signed-off-by: Matt Fleming Tested-by: Will Deacon Signed-off-by: Robert Richter

ARM: oprofile: Move non-ARM code into separate init/exit

2010-10-11T15:46:15Z

In preparation for moving the majority of this oprofile code into an architecture-neutral place separate the architecture-independent code into oprofile_perf_init() and oprofile_perf_exit(). Signed-off-by: Matt Fleming Tested-by: Will Deacon Signed-off-by: Robert Richter

ARM: oprofile: Rename op_arm to oprofile_perf

2010-10-11T15:46:15Z

In preparation for moving the generic functions out of this file, give the functions more general names (e.g. remove "arm" from the names). Signed-off-by: Matt Fleming Tested-by: Will Deacon Signed-off-by: Robert Richter

oprofile: Make op_name_from_perf_id() global

2010-10-11T15:46:15Z

Make op_name_from_perf_id() global so that we have a way for each architecture to construct an oprofile name for op->cpu_type. We need to remove the argument from the function prototype so that we can hide all implementation details inside the function. Signed-off-by: Matt Fleming Signed-off-by: Robert Richter

perf: Add helper function to return number of counters

2010-10-11T08:38:13Z

The number of counters for the registered pmu is needed in a few places so provide a helper function that returns this number. Signed-off-by: Matt Fleming Tested-by: Will Deacon Acked-by: Paul Mundt Acked-by: Peter Zijlstra Signed-off-by: Robert Richter

oprofile, arm: initialize perf_event pointers with NULL

2010-08-31T10:51:43Z

The pointers must be NULL'ed to avoid double-freeing the pointers in rare cases during reinitialization. Signed-off-by: Robert Richter

ARM: oprofile: fix and simplify init/exit functions

2010-08-31T09:49:07Z

Now that oprofile_arch_exit is only called when the OProfile module is unloaded, it can assume that init completed successfully and not have to worry about double frees or releasing NULL perf events. This patch ensures that oprofile_arch_init fails gracefully on ARM and simplifies the exit code based on the above. Cc: Robert Richter Cc: Matt Fleming Cc: Peter Zijlstra Cc: Ingo Molnar Signed-off-by: Will Deacon Signed-off-by: Robert Richter

ARM: 6074/1: oprofile: convert from sysdev to platform device

2010-05-17T10:53:59Z

This is a reworking of an original patch posted by Aaro Koskinen: oprofile does not work with PM, because sysdev_suspend() is done with interrupts disabled and oprofile needs a mutex. Implementing oprofile as a platform device solves this problem. Cc: Aaro Koskinen Signed-off-by: Will Deacon Signed-off-by: Aaro Koskinen Signed-off-by: Russell King

ARM: 6073/1: oprofile: remove old files and update KConfig

2010-05-17T10:53:58Z

Enable hardware perf-events if CPU_HAS_PMU and select HAVE_OPROFILE if HAVE_PERF_EVENTS. If no hardware support is present, OProfile will fall back to timer mode. This patch also removes the old OProfile drivers in favour of the code implemented by perf. Signed-off-by: Will Deacon Signed-off-by: Russell King