[tip:perf/urgent] oprofile: perf: use NR_CPUS instead or nr_cpumask_bits for static array

[tip-bot for Will Deacon <will.deacon@xxxxxxx>]

Commit-ID:  e734568b675c985db2026848fefaac01c22977a5
Gitweb:     http://git.kernel.org/tip/e734568b675c985db2026848fefaac01c22977a5
Author:     Will Deacon <will.deacon@xxxxxxx>
AuthorDate: Fri, 8 Jun 2012 16:16:04 +0100
Committer:  Robert Richter <robert.richter@xxxxxxx>
CommitDate: Thu, 21 Jun 2012 16:15:11 +0200

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@xxxxxxxxxxxxxxxxx>
Reported-by: Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v2.6.37+
Signed-off-by: Robert Richter <robert.richter@xxxxxxx>
---
 drivers/oprofile/oprofile_perf.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/oprofile/oprofile_perf.c b/drivers/oprofile/oprofile_perf.c
index da14432..efc4b7f 100644
--- a/drivers/oprofile/oprofile_perf.c
+++ b/drivers/oprofile/oprofile_perf.c
@@ -25,7 +25,7 @@ static int oprofile_perf_enabled;
 static DEFINE_MUTEX(oprofile_perf_mutex);
 
 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;
 
 /*
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