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oprofile: perf: use NR_CPUS instead or nr_cpumask_bits for static array 

The OProfile perf backend uses a static array to keep track of the
perf events on the system. When compiling with CONFIG_CPUMASK_OFFSTACK=y
&& SMP, nr_cpumask_bits is not a compile-time constant and the build
will fail with:

oprofile_perf.c:28: error: variably modified 'perf_events' at file scope

This patch uses NR_CPUs instead of nr_cpumask_bits for the array
initialisation. If this causes space problems in the future, we can
always move to dynamic allocation for the events array.

Cc: Matt Fleming <matt@console-pimps.org>
Reported-by: Russell King - ARM Linux <linux@arm.linux.org.uk>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org> # v2.6.37+
Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Will Deacon 2012-06-08 16:16:04 +01:00 committed by Robert Richter
parent 6921a575c9
commit e734568b67
1 changed files with 1 additions and 1 deletions
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2
drivers/oprofile/oprofile_perf.c
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@ -25,7 +25,7 @@ static int oprofile_perf_enabled;
static DEFINE_MUTEX(oprofile_perf_mutex); static DEFINE_MUTEX(oprofile_perf_mutex);
static struct op_counter_config *counter_config; static struct op_counter_config *counter_config;
static struct perf_event **perf_events[nr_cpumask_bits]; static struct perf_event **perf_events[NR_CPUS];
static int num_counters; static int num_counters;
/* /*