From 4d1814f48edec31f12737609cd1c871864c8298b Mon Sep 17 00:00:00 2001 From: Robert Richter Date: Wed, 29 Sep 2010 15:42:30 +0200 Subject: [PATCH] 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 Signed-off-by: Robert Richter --- arch/arm/oprofile/common.c | 53 +++++++++++++++++++++++----------------------- 1 file 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) { -- 2.7.4