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695 lines
18 KiB
695 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* kernel/lockdep_proc.c |
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* |
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* Runtime locking correctness validator |
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* |
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* Started by Ingo Molnar: |
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* |
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* Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <[email protected]> |
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* Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra |
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* |
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* Code for /proc/lockdep and /proc/lockdep_stats: |
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* |
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*/ |
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#include <linux/export.h> |
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#include <linux/proc_fs.h> |
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#include <linux/seq_file.h> |
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#include <linux/kallsyms.h> |
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#include <linux/debug_locks.h> |
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#include <linux/vmalloc.h> |
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#include <linux/sort.h> |
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#include <linux/uaccess.h> |
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#include <asm/div64.h> |
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#include "lockdep_internals.h" |
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static void *l_next(struct seq_file *m, void *v, loff_t *pos) |
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{ |
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return seq_list_next(v, &all_lock_classes, pos); |
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} |
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static void *l_start(struct seq_file *m, loff_t *pos) |
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{ |
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return seq_list_start_head(&all_lock_classes, *pos); |
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} |
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static void l_stop(struct seq_file *m, void *v) |
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{ |
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} |
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static void print_name(struct seq_file *m, struct lock_class *class) |
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{ |
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char str[KSYM_NAME_LEN]; |
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const char *name = class->name; |
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if (!name) { |
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name = __get_key_name(class->key, str); |
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seq_printf(m, "%s", name); |
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} else{ |
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seq_printf(m, "%s", name); |
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if (class->name_version > 1) |
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seq_printf(m, "#%d", class->name_version); |
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if (class->subclass) |
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seq_printf(m, "/%d", class->subclass); |
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} |
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} |
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static int l_show(struct seq_file *m, void *v) |
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{ |
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struct lock_class *class = list_entry(v, struct lock_class, lock_entry); |
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struct lock_list *entry; |
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char usage[LOCK_USAGE_CHARS]; |
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if (v == &all_lock_classes) { |
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seq_printf(m, "all lock classes:\n"); |
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return 0; |
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} |
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seq_printf(m, "%p", class->key); |
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#ifdef CONFIG_DEBUG_LOCKDEP |
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seq_printf(m, " OPS:%8ld", debug_class_ops_read(class)); |
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#endif |
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if (IS_ENABLED(CONFIG_PROVE_LOCKING)) { |
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seq_printf(m, " FD:%5ld", lockdep_count_forward_deps(class)); |
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seq_printf(m, " BD:%5ld", lockdep_count_backward_deps(class)); |
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get_usage_chars(class, usage); |
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seq_printf(m, " %s", usage); |
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} |
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seq_printf(m, ": "); |
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print_name(m, class); |
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seq_puts(m, "\n"); |
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if (IS_ENABLED(CONFIG_PROVE_LOCKING)) { |
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list_for_each_entry(entry, &class->locks_after, entry) { |
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if (entry->distance == 1) { |
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seq_printf(m, " -> [%p] ", entry->class->key); |
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print_name(m, entry->class); |
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seq_puts(m, "\n"); |
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} |
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} |
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seq_puts(m, "\n"); |
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} |
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return 0; |
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} |
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static const struct seq_operations lockdep_ops = { |
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.start = l_start, |
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.next = l_next, |
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.stop = l_stop, |
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.show = l_show, |
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}; |
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#ifdef CONFIG_PROVE_LOCKING |
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static void *lc_start(struct seq_file *m, loff_t *pos) |
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{ |
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if (*pos < 0) |
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return NULL; |
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if (*pos == 0) |
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return SEQ_START_TOKEN; |
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return lock_chains + (*pos - 1); |
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} |
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static void *lc_next(struct seq_file *m, void *v, loff_t *pos) |
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{ |
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*pos = lockdep_next_lockchain(*pos - 1) + 1; |
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return lc_start(m, pos); |
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} |
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static void lc_stop(struct seq_file *m, void *v) |
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{ |
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} |
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static int lc_show(struct seq_file *m, void *v) |
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{ |
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struct lock_chain *chain = v; |
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struct lock_class *class; |
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int i; |
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static const char * const irq_strs[] = { |
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[0] = "0", |
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[LOCK_CHAIN_HARDIRQ_CONTEXT] = "hardirq", |
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[LOCK_CHAIN_SOFTIRQ_CONTEXT] = "softirq", |
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[LOCK_CHAIN_SOFTIRQ_CONTEXT| |
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LOCK_CHAIN_HARDIRQ_CONTEXT] = "hardirq|softirq", |
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}; |
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if (v == SEQ_START_TOKEN) { |
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if (!nr_free_chain_hlocks) |
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seq_printf(m, "(buggered) "); |
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seq_printf(m, "all lock chains:\n"); |
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return 0; |
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} |
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seq_printf(m, "irq_context: %s\n", irq_strs[chain->irq_context]); |
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for (i = 0; i < chain->depth; i++) { |
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class = lock_chain_get_class(chain, i); |
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if (!class->key) |
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continue; |
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seq_printf(m, "[%p] ", class->key); |
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print_name(m, class); |
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seq_puts(m, "\n"); |
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} |
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seq_puts(m, "\n"); |
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return 0; |
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} |
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static const struct seq_operations lockdep_chains_ops = { |
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.start = lc_start, |
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.next = lc_next, |
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.stop = lc_stop, |
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.show = lc_show, |
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}; |
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#endif /* CONFIG_PROVE_LOCKING */ |
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static void lockdep_stats_debug_show(struct seq_file *m) |
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{ |
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#ifdef CONFIG_DEBUG_LOCKDEP |
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unsigned long long hi1 = debug_atomic_read(hardirqs_on_events), |
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hi2 = debug_atomic_read(hardirqs_off_events), |
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hr1 = debug_atomic_read(redundant_hardirqs_on), |
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hr2 = debug_atomic_read(redundant_hardirqs_off), |
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si1 = debug_atomic_read(softirqs_on_events), |
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si2 = debug_atomic_read(softirqs_off_events), |
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sr1 = debug_atomic_read(redundant_softirqs_on), |
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sr2 = debug_atomic_read(redundant_softirqs_off); |
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seq_printf(m, " chain lookup misses: %11llu\n", |
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debug_atomic_read(chain_lookup_misses)); |
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seq_printf(m, " chain lookup hits: %11llu\n", |
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debug_atomic_read(chain_lookup_hits)); |
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seq_printf(m, " cyclic checks: %11llu\n", |
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debug_atomic_read(nr_cyclic_checks)); |
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seq_printf(m, " redundant checks: %11llu\n", |
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debug_atomic_read(nr_redundant_checks)); |
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seq_printf(m, " redundant links: %11llu\n", |
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debug_atomic_read(nr_redundant)); |
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seq_printf(m, " find-mask forwards checks: %11llu\n", |
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debug_atomic_read(nr_find_usage_forwards_checks)); |
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seq_printf(m, " find-mask backwards checks: %11llu\n", |
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debug_atomic_read(nr_find_usage_backwards_checks)); |
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seq_printf(m, " hardirq on events: %11llu\n", hi1); |
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seq_printf(m, " hardirq off events: %11llu\n", hi2); |
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seq_printf(m, " redundant hardirq ons: %11llu\n", hr1); |
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seq_printf(m, " redundant hardirq offs: %11llu\n", hr2); |
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seq_printf(m, " softirq on events: %11llu\n", si1); |
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seq_printf(m, " softirq off events: %11llu\n", si2); |
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seq_printf(m, " redundant softirq ons: %11llu\n", sr1); |
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seq_printf(m, " redundant softirq offs: %11llu\n", sr2); |
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#endif |
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} |
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static int lockdep_stats_show(struct seq_file *m, void *v) |
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{ |
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unsigned long nr_unused = 0, nr_uncategorized = 0, |
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nr_irq_safe = 0, nr_irq_unsafe = 0, |
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nr_softirq_safe = 0, nr_softirq_unsafe = 0, |
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nr_hardirq_safe = 0, nr_hardirq_unsafe = 0, |
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nr_irq_read_safe = 0, nr_irq_read_unsafe = 0, |
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nr_softirq_read_safe = 0, nr_softirq_read_unsafe = 0, |
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nr_hardirq_read_safe = 0, nr_hardirq_read_unsafe = 0, |
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sum_forward_deps = 0; |
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#ifdef CONFIG_PROVE_LOCKING |
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struct lock_class *class; |
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list_for_each_entry(class, &all_lock_classes, lock_entry) { |
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if (class->usage_mask == 0) |
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nr_unused++; |
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if (class->usage_mask == LOCKF_USED) |
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nr_uncategorized++; |
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if (class->usage_mask & LOCKF_USED_IN_IRQ) |
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nr_irq_safe++; |
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if (class->usage_mask & LOCKF_ENABLED_IRQ) |
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nr_irq_unsafe++; |
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if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ) |
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nr_softirq_safe++; |
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if (class->usage_mask & LOCKF_ENABLED_SOFTIRQ) |
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nr_softirq_unsafe++; |
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if (class->usage_mask & LOCKF_USED_IN_HARDIRQ) |
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nr_hardirq_safe++; |
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if (class->usage_mask & LOCKF_ENABLED_HARDIRQ) |
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nr_hardirq_unsafe++; |
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if (class->usage_mask & LOCKF_USED_IN_IRQ_READ) |
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nr_irq_read_safe++; |
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if (class->usage_mask & LOCKF_ENABLED_IRQ_READ) |
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nr_irq_read_unsafe++; |
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if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ_READ) |
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nr_softirq_read_safe++; |
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if (class->usage_mask & LOCKF_ENABLED_SOFTIRQ_READ) |
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nr_softirq_read_unsafe++; |
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if (class->usage_mask & LOCKF_USED_IN_HARDIRQ_READ) |
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nr_hardirq_read_safe++; |
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if (class->usage_mask & LOCKF_ENABLED_HARDIRQ_READ) |
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nr_hardirq_read_unsafe++; |
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sum_forward_deps += lockdep_count_forward_deps(class); |
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} |
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#ifdef CONFIG_DEBUG_LOCKDEP |
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DEBUG_LOCKS_WARN_ON(debug_atomic_read(nr_unused_locks) != nr_unused); |
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#endif |
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#endif |
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seq_printf(m, " lock-classes: %11lu [max: %lu]\n", |
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nr_lock_classes, MAX_LOCKDEP_KEYS); |
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seq_printf(m, " direct dependencies: %11lu [max: %lu]\n", |
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nr_list_entries, MAX_LOCKDEP_ENTRIES); |
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seq_printf(m, " indirect dependencies: %11lu\n", |
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sum_forward_deps); |
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/* |
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* Total number of dependencies: |
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* |
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* All irq-safe locks may nest inside irq-unsafe locks, |
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* plus all the other known dependencies: |
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*/ |
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seq_printf(m, " all direct dependencies: %11lu\n", |
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nr_irq_unsafe * nr_irq_safe + |
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nr_hardirq_unsafe * nr_hardirq_safe + |
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nr_list_entries); |
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#ifdef CONFIG_PROVE_LOCKING |
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seq_printf(m, " dependency chains: %11lu [max: %lu]\n", |
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lock_chain_count(), MAX_LOCKDEP_CHAINS); |
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seq_printf(m, " dependency chain hlocks used: %11lu [max: %lu]\n", |
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MAX_LOCKDEP_CHAIN_HLOCKS - |
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(nr_free_chain_hlocks + nr_lost_chain_hlocks), |
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MAX_LOCKDEP_CHAIN_HLOCKS); |
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seq_printf(m, " dependency chain hlocks lost: %11u\n", |
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nr_lost_chain_hlocks); |
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#endif |
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#ifdef CONFIG_TRACE_IRQFLAGS |
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seq_printf(m, " in-hardirq chains: %11u\n", |
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nr_hardirq_chains); |
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seq_printf(m, " in-softirq chains: %11u\n", |
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nr_softirq_chains); |
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#endif |
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seq_printf(m, " in-process chains: %11u\n", |
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nr_process_chains); |
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seq_printf(m, " stack-trace entries: %11lu [max: %lu]\n", |
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nr_stack_trace_entries, MAX_STACK_TRACE_ENTRIES); |
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#if defined(CONFIG_TRACE_IRQFLAGS) && defined(CONFIG_PROVE_LOCKING) |
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seq_printf(m, " number of stack traces: %11llu\n", |
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lockdep_stack_trace_count()); |
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seq_printf(m, " number of stack hash chains: %11llu\n", |
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lockdep_stack_hash_count()); |
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#endif |
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seq_printf(m, " combined max dependencies: %11u\n", |
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(nr_hardirq_chains + 1) * |
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(nr_softirq_chains + 1) * |
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(nr_process_chains + 1) |
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); |
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seq_printf(m, " hardirq-safe locks: %11lu\n", |
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nr_hardirq_safe); |
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seq_printf(m, " hardirq-unsafe locks: %11lu\n", |
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nr_hardirq_unsafe); |
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seq_printf(m, " softirq-safe locks: %11lu\n", |
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nr_softirq_safe); |
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seq_printf(m, " softirq-unsafe locks: %11lu\n", |
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nr_softirq_unsafe); |
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seq_printf(m, " irq-safe locks: %11lu\n", |
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nr_irq_safe); |
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seq_printf(m, " irq-unsafe locks: %11lu\n", |
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nr_irq_unsafe); |
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seq_printf(m, " hardirq-read-safe locks: %11lu\n", |
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nr_hardirq_read_safe); |
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seq_printf(m, " hardirq-read-unsafe locks: %11lu\n", |
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nr_hardirq_read_unsafe); |
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seq_printf(m, " softirq-read-safe locks: %11lu\n", |
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nr_softirq_read_safe); |
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seq_printf(m, " softirq-read-unsafe locks: %11lu\n", |
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nr_softirq_read_unsafe); |
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seq_printf(m, " irq-read-safe locks: %11lu\n", |
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nr_irq_read_safe); |
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seq_printf(m, " irq-read-unsafe locks: %11lu\n", |
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nr_irq_read_unsafe); |
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seq_printf(m, " uncategorized locks: %11lu\n", |
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nr_uncategorized); |
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seq_printf(m, " unused locks: %11lu\n", |
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nr_unused); |
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seq_printf(m, " max locking depth: %11u\n", |
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max_lockdep_depth); |
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#ifdef CONFIG_PROVE_LOCKING |
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seq_printf(m, " max bfs queue depth: %11u\n", |
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max_bfs_queue_depth); |
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#endif |
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lockdep_stats_debug_show(m); |
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seq_printf(m, " debug_locks: %11u\n", |
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debug_locks); |
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/* |
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* Zapped classes and lockdep data buffers reuse statistics. |
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*/ |
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seq_puts(m, "\n"); |
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seq_printf(m, " zapped classes: %11lu\n", |
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nr_zapped_classes); |
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#ifdef CONFIG_PROVE_LOCKING |
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seq_printf(m, " zapped lock chains: %11lu\n", |
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nr_zapped_lock_chains); |
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seq_printf(m, " large chain blocks: %11u\n", |
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nr_large_chain_blocks); |
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#endif |
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return 0; |
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} |
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#ifdef CONFIG_LOCK_STAT |
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struct lock_stat_data { |
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struct lock_class *class; |
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struct lock_class_stats stats; |
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}; |
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struct lock_stat_seq { |
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struct lock_stat_data *iter_end; |
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struct lock_stat_data stats[MAX_LOCKDEP_KEYS]; |
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}; |
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/* |
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* sort on absolute number of contentions |
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*/ |
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static int lock_stat_cmp(const void *l, const void *r) |
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{ |
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const struct lock_stat_data *dl = l, *dr = r; |
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unsigned long nl, nr; |
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nl = dl->stats.read_waittime.nr + dl->stats.write_waittime.nr; |
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nr = dr->stats.read_waittime.nr + dr->stats.write_waittime.nr; |
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return nr - nl; |
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} |
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static void seq_line(struct seq_file *m, char c, int offset, int length) |
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{ |
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int i; |
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for (i = 0; i < offset; i++) |
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seq_puts(m, " "); |
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for (i = 0; i < length; i++) |
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seq_printf(m, "%c", c); |
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seq_puts(m, "\n"); |
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} |
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static void snprint_time(char *buf, size_t bufsiz, s64 nr) |
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{ |
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s64 div; |
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s32 rem; |
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nr += 5; /* for display rounding */ |
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div = div_s64_rem(nr, 1000, &rem); |
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snprintf(buf, bufsiz, "%lld.%02d", (long long)div, (int)rem/10); |
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} |
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static void seq_time(struct seq_file *m, s64 time) |
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{ |
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char num[15]; |
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snprint_time(num, sizeof(num), time); |
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seq_printf(m, " %14s", num); |
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} |
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static void seq_lock_time(struct seq_file *m, struct lock_time *lt) |
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{ |
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seq_printf(m, "%14lu", lt->nr); |
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seq_time(m, lt->min); |
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seq_time(m, lt->max); |
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seq_time(m, lt->total); |
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seq_time(m, lt->nr ? div64_u64(lt->total, lt->nr) : 0); |
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} |
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static void seq_stats(struct seq_file *m, struct lock_stat_data *data) |
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{ |
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const struct lockdep_subclass_key *ckey; |
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struct lock_class_stats *stats; |
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struct lock_class *class; |
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const char *cname; |
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int i, namelen; |
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char name[39]; |
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class = data->class; |
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stats = &data->stats; |
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namelen = 38; |
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if (class->name_version > 1) |
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namelen -= 2; /* XXX truncates versions > 9 */ |
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if (class->subclass) |
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namelen -= 2; |
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rcu_read_lock_sched(); |
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cname = rcu_dereference_sched(class->name); |
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ckey = rcu_dereference_sched(class->key); |
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if (!cname && !ckey) { |
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rcu_read_unlock_sched(); |
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return; |
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} else if (!cname) { |
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char str[KSYM_NAME_LEN]; |
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const char *key_name; |
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key_name = __get_key_name(ckey, str); |
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snprintf(name, namelen, "%s", key_name); |
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} else { |
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snprintf(name, namelen, "%s", cname); |
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} |
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rcu_read_unlock_sched(); |
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namelen = strlen(name); |
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if (class->name_version > 1) { |
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snprintf(name+namelen, 3, "#%d", class->name_version); |
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namelen += 2; |
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} |
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if (class->subclass) { |
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snprintf(name+namelen, 3, "/%d", class->subclass); |
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namelen += 2; |
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} |
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if (stats->write_holdtime.nr) { |
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if (stats->read_holdtime.nr) |
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seq_printf(m, "%38s-W:", name); |
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else |
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seq_printf(m, "%40s:", name); |
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seq_printf(m, "%14lu ", stats->bounces[bounce_contended_write]); |
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seq_lock_time(m, &stats->write_waittime); |
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seq_printf(m, " %14lu ", stats->bounces[bounce_acquired_write]); |
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seq_lock_time(m, &stats->write_holdtime); |
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seq_puts(m, "\n"); |
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} |
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if (stats->read_holdtime.nr) { |
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seq_printf(m, "%38s-R:", name); |
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seq_printf(m, "%14lu ", stats->bounces[bounce_contended_read]); |
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seq_lock_time(m, &stats->read_waittime); |
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seq_printf(m, " %14lu ", stats->bounces[bounce_acquired_read]); |
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seq_lock_time(m, &stats->read_holdtime); |
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seq_puts(m, "\n"); |
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} |
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if (stats->read_waittime.nr + stats->write_waittime.nr == 0) |
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return; |
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if (stats->read_holdtime.nr) |
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namelen += 2; |
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for (i = 0; i < LOCKSTAT_POINTS; i++) { |
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char ip[32]; |
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|
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if (class->contention_point[i] == 0) |
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break; |
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if (!i) |
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seq_line(m, '-', 40-namelen, namelen); |
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snprintf(ip, sizeof(ip), "[<%p>]", |
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(void *)class->contention_point[i]); |
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seq_printf(m, "%40s %14lu %29s %pS\n", |
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name, stats->contention_point[i], |
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ip, (void *)class->contention_point[i]); |
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} |
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for (i = 0; i < LOCKSTAT_POINTS; i++) { |
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char ip[32]; |
|
|
|
if (class->contending_point[i] == 0) |
|
break; |
|
|
|
if (!i) |
|
seq_line(m, '-', 40-namelen, namelen); |
|
|
|
snprintf(ip, sizeof(ip), "[<%p>]", |
|
(void *)class->contending_point[i]); |
|
seq_printf(m, "%40s %14lu %29s %pS\n", |
|
name, stats->contending_point[i], |
|
ip, (void *)class->contending_point[i]); |
|
} |
|
if (i) { |
|
seq_puts(m, "\n"); |
|
seq_line(m, '.', 0, 40 + 1 + 12 * (14 + 1)); |
|
seq_puts(m, "\n"); |
|
} |
|
} |
|
|
|
static void seq_header(struct seq_file *m) |
|
{ |
|
seq_puts(m, "lock_stat version 0.4\n"); |
|
|
|
if (unlikely(!debug_locks)) |
|
seq_printf(m, "*WARNING* lock debugging disabled!! - possibly due to a lockdep warning\n"); |
|
|
|
seq_line(m, '-', 0, 40 + 1 + 12 * (14 + 1)); |
|
seq_printf(m, "%40s %14s %14s %14s %14s %14s %14s %14s %14s %14s %14s " |
|
"%14s %14s\n", |
|
"class name", |
|
"con-bounces", |
|
"contentions", |
|
"waittime-min", |
|
"waittime-max", |
|
"waittime-total", |
|
"waittime-avg", |
|
"acq-bounces", |
|
"acquisitions", |
|
"holdtime-min", |
|
"holdtime-max", |
|
"holdtime-total", |
|
"holdtime-avg"); |
|
seq_line(m, '-', 0, 40 + 1 + 12 * (14 + 1)); |
|
seq_printf(m, "\n"); |
|
} |
|
|
|
static void *ls_start(struct seq_file *m, loff_t *pos) |
|
{ |
|
struct lock_stat_seq *data = m->private; |
|
struct lock_stat_data *iter; |
|
|
|
if (*pos == 0) |
|
return SEQ_START_TOKEN; |
|
|
|
iter = data->stats + (*pos - 1); |
|
if (iter >= data->iter_end) |
|
iter = NULL; |
|
|
|
return iter; |
|
} |
|
|
|
static void *ls_next(struct seq_file *m, void *v, loff_t *pos) |
|
{ |
|
(*pos)++; |
|
return ls_start(m, pos); |
|
} |
|
|
|
static void ls_stop(struct seq_file *m, void *v) |
|
{ |
|
} |
|
|
|
static int ls_show(struct seq_file *m, void *v) |
|
{ |
|
if (v == SEQ_START_TOKEN) |
|
seq_header(m); |
|
else |
|
seq_stats(m, v); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct seq_operations lockstat_ops = { |
|
.start = ls_start, |
|
.next = ls_next, |
|
.stop = ls_stop, |
|
.show = ls_show, |
|
}; |
|
|
|
static int lock_stat_open(struct inode *inode, struct file *file) |
|
{ |
|
int res; |
|
struct lock_class *class; |
|
struct lock_stat_seq *data = vmalloc(sizeof(struct lock_stat_seq)); |
|
|
|
if (!data) |
|
return -ENOMEM; |
|
|
|
res = seq_open(file, &lockstat_ops); |
|
if (!res) { |
|
struct lock_stat_data *iter = data->stats; |
|
struct seq_file *m = file->private_data; |
|
|
|
list_for_each_entry(class, &all_lock_classes, lock_entry) { |
|
iter->class = class; |
|
iter->stats = lock_stats(class); |
|
iter++; |
|
} |
|
data->iter_end = iter; |
|
|
|
sort(data->stats, data->iter_end - data->stats, |
|
sizeof(struct lock_stat_data), |
|
lock_stat_cmp, NULL); |
|
|
|
m->private = data; |
|
} else |
|
vfree(data); |
|
|
|
return res; |
|
} |
|
|
|
static ssize_t lock_stat_write(struct file *file, const char __user *buf, |
|
size_t count, loff_t *ppos) |
|
{ |
|
struct lock_class *class; |
|
char c; |
|
|
|
if (count) { |
|
if (get_user(c, buf)) |
|
return -EFAULT; |
|
|
|
if (c != '0') |
|
return count; |
|
|
|
list_for_each_entry(class, &all_lock_classes, lock_entry) |
|
clear_lock_stats(class); |
|
} |
|
return count; |
|
} |
|
|
|
static int lock_stat_release(struct inode *inode, struct file *file) |
|
{ |
|
struct seq_file *seq = file->private_data; |
|
|
|
vfree(seq->private); |
|
return seq_release(inode, file); |
|
} |
|
|
|
static const struct proc_ops lock_stat_proc_ops = { |
|
.proc_open = lock_stat_open, |
|
.proc_write = lock_stat_write, |
|
.proc_read = seq_read, |
|
.proc_lseek = seq_lseek, |
|
.proc_release = lock_stat_release, |
|
}; |
|
#endif /* CONFIG_LOCK_STAT */ |
|
|
|
static int __init lockdep_proc_init(void) |
|
{ |
|
proc_create_seq("lockdep", S_IRUSR, NULL, &lockdep_ops); |
|
#ifdef CONFIG_PROVE_LOCKING |
|
proc_create_seq("lockdep_chains", S_IRUSR, NULL, &lockdep_chains_ops); |
|
#endif |
|
proc_create_single("lockdep_stats", S_IRUSR, NULL, lockdep_stats_show); |
|
#ifdef CONFIG_LOCK_STAT |
|
proc_create("lock_stat", S_IRUSR | S_IWUSR, NULL, &lock_stat_proc_ops); |
|
#endif |
|
|
|
return 0; |
|
} |
|
|
|
__initcall(lockdep_proc_init); |
|
|
|
|