Commit-ID: 4d1814f48edec31f12737609cd1c871864c8298b
Gitweb: http://git.kernel.org/tip/4d1814f48edec31f12737609cd1c871864c8298b
Author: Robert Richter <robert.richter@xxxxxxx>
AuthorDate: Wed, 29 Sep 2010 15:42:30 +0200
Committer: Robert Richter <robert.richter@xxxxxxx>
CommitDate: Mon, 4 Oct 2010 10:54:05 +0200
oprofile, ARM: Use oprofile_arch_exit() to cleanup on failure
There is duplicate cleanup code in the init and exit functions. Now,
oprofile_arch_exit() is also used if oprofile_arch_init() fails.
Acked-by: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Robert Richter <robert.richter@xxxxxxx>
---
arch/arm/oprofile/common.c | 53 +++++++++++++++++++++----------------------
1 files changed, 26 insertions(+), 27 deletions(-)
diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c
index bd7426f..7ae9eeb 100644
--- a/arch/arm/oprofile/common.c
+++ b/arch/arm/oprofile/common.c
@@ -348,10 +348,33 @@ static void arm_backtrace(struct pt_regs * const regs, unsigned int depth)
tail = user_backtrace(tail);
}
+void oprofile_arch_exit(void)
+{
+ int cpu, id;
+ struct perf_event *event;
+
+ for_each_possible_cpu(cpu) {
+ for (id = 0; id < perf_num_counters; ++id) {
+ event = perf_events[cpu][id];
+ if (event)
+ perf_event_release_kernel(event);
+ }
+
+ kfree(perf_events[cpu]);
+ }
+
+ kfree(counter_config);
+ exit_driverfs();
+}
+
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
int cpu, ret = 0;
+ ret = init_driverfs();
+ if (ret)
+ return ret;
+
memset(&perf_events, 0, sizeof(perf_events));
perf_num_counters = armpmu_get_max_events();
@@ -363,13 +386,10 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
pr_info("oprofile: failed to allocate %d "
"counters\n", perf_num_counters);
ret = -ENOMEM;
+ perf_num_counters = 0;
goto out;
}
- ret = init_driverfs();
- if (ret)
- goto out;
-
for_each_possible_cpu(cpu) {
perf_events[cpu] = kcalloc(perf_num_counters,
sizeof(struct perf_event *), GFP_KERNEL);
@@ -395,33 +415,12 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
pr_info("oprofile: using %s\n", ops->cpu_type);
out:
- if (ret) {
- for_each_possible_cpu(cpu)
- kfree(perf_events[cpu]);
- kfree(counter_config);
- }
+ if (ret)
+ oprofile_arch_exit();
return ret;
}
-void __exit oprofile_arch_exit(void)
-{
- int cpu, id;
- struct perf_event *event;
-
- for_each_possible_cpu(cpu) {
- for (id = 0; id < perf_num_counters; ++id) {
- event = perf_events[cpu][id];
- if (event)
- perf_event_release_kernel(event);
- }
-
- kfree(perf_events[cpu]);
- }
-
- kfree(counter_config);
- exit_driverfs();
-}
#else
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
--
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