add stmac read mac form eeprom

hc

2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/kernel/locking/lockdep_proc.c
..
..
@@ -24,14 +24,33 @@
24
24
 
25
25
 #include "lockdep_internals.h"
26
26
 
27
+/*
28
+ * Since iteration of lock_classes is done without holding the lockdep lock,
29
+ * it is not safe to iterate all_lock_classes list directly as the iteration
30
+ * may branch off to free_lock_classes or the zapped list. Iteration is done
31
+ * directly on the lock_classes array by checking the lock_classes_in_use
32
+ * bitmap and max_lock_class_idx.
33
+ */
34
+#define iterate_lock_classes(idx, class)				\
35
+	for (idx = 0, class = lock_classes; idx <= max_lock_class_idx;	\
36
+	     idx++, class++)
37
+
27
38
 static void *l_next(struct seq_file *m, void *v, loff_t *pos)
28
39
 {
29
-	return seq_list_next(v, &all_lock_classes, pos);
40
+	struct lock_class *class = v;
41
+
42
+	++class;
43
+	*pos = class - lock_classes;
44
+	return (*pos > max_lock_class_idx) ? NULL : class;
30
45
 }
31
46
 
32
47
 static void *l_start(struct seq_file *m, loff_t *pos)
33
48
 {
34
-	return seq_list_start_head(&all_lock_classes, *pos);
49
+	unsigned long idx = *pos;
50
+
51
+	if (idx > max_lock_class_idx)
52
+		return NULL;
53
+	return lock_classes + idx;
35
54
 }
36
55
 
37
56
 static void l_stop(struct seq_file *m, void *v)
..
..
@@ -57,18 +76,20 @@
57
76
 
58
77
 static int l_show(struct seq_file *m, void *v)
59
78
 {
60
-	struct lock_class *class = list_entry(v, struct lock_class, lock_entry);
79
+	struct lock_class *class = v;
61
80
 	struct lock_list *entry;
62
81
 	char usage[LOCK_USAGE_CHARS];
82
+	int idx = class - lock_classes;
63
83
 
64
-	if (v == &all_lock_classes) {
84
+	if (v == lock_classes)
65
85
 		seq_printf(m, "all lock classes:\n");
86
+
87
+	if (!test_bit(idx, lock_classes_in_use))
66
88
 		return 0;
67
-	}
68
89
 
69
90
 	seq_printf(m, "%p", class->key);
70
91
 #ifdef CONFIG_DEBUG_LOCKDEP
71
-	seq_printf(m, " OPS:%8ld", class->ops);
92
+	seq_printf(m, " OPS:%8ld", debug_class_ops_read(class));
72
93
 #endif
73
94
 #ifdef CONFIG_PROVE_LOCKING
74
95
 	seq_printf(m, " FD:%5ld", lockdep_count_forward_deps(class));
..
..
@@ -104,18 +125,18 @@
104
125
 #ifdef CONFIG_PROVE_LOCKING
105
126
 static void *lc_start(struct seq_file *m, loff_t *pos)
106
127
 {
128
+	if (*pos < 0)
129
+		return NULL;
130
+
107
131
 	if (*pos == 0)
108
132
 		return SEQ_START_TOKEN;
109
133
 
110
-	if (*pos - 1 < nr_lock_chains)
111
-		return lock_chains + (*pos - 1);
112
-
113
-	return NULL;
134
+	return lock_chains + (*pos - 1);
114
135
 }
115
136
 
116
137
 static void *lc_next(struct seq_file *m, void *v, loff_t *pos)
117
138
 {
118
-	(*pos)++;
139
+	*pos = lockdep_next_lockchain(*pos - 1) + 1;
119
140
 	return lc_start(m, pos);
120
141
 }
121
142
 
..
..
@@ -128,15 +149,22 @@
128
149
 	struct lock_chain *chain = v;
129
150
 	struct lock_class *class;
130
151
 	int i;
152
+	static const char * const irq_strs[] = {
153
+		[0]			     = "0",
154
+		[LOCK_CHAIN_HARDIRQ_CONTEXT] = "hardirq",
155
+		[LOCK_CHAIN_SOFTIRQ_CONTEXT] = "softirq",
156
+		[LOCK_CHAIN_SOFTIRQ_CONTEXT|
157
+		 LOCK_CHAIN_HARDIRQ_CONTEXT] = "hardirq|softirq",
158
+	};
131
159
 
132
160
 	if (v == SEQ_START_TOKEN) {
133
-		if (nr_chain_hlocks > MAX_LOCKDEP_CHAIN_HLOCKS)
161
+		if (!nr_free_chain_hlocks)
134
162
 			seq_printf(m, "(buggered) ");
135
163
 		seq_printf(m, "all lock chains:\n");
136
164
 		return 0;
137
165
 	}
138
166
 
139
-	seq_printf(m, "irq_context: %d\n", chain->irq_context);
167
+	seq_printf(m, "irq_context: %s\n", irq_strs[chain->irq_context]);
140
168
 
141
169
 	for (i = 0; i < chain->depth; i++) {
142
170
 		class = lock_chain_get_class(chain, i);
..
..
@@ -211,8 +239,11 @@
211
239
 
212
240
 #ifdef CONFIG_PROVE_LOCKING
213
241
 	struct lock_class *class;
242
+	unsigned long idx;
214
243
 
215
-	list_for_each_entry(class, &all_lock_classes, lock_entry) {
244
+	iterate_lock_classes(idx, class) {
245
+		if (!test_bit(idx, lock_classes_in_use))
246
+			continue;
216
247
 
217
248
 		if (class->usage_mask == 0)
218
249
 			nr_unused++;
..
..
@@ -245,6 +276,7 @@
245
276
 
246
277
 		sum_forward_deps += lockdep_count_forward_deps(class);
247
278
 	}
279
+
248
280
 #ifdef CONFIG_DEBUG_LOCKDEP
249
281
 	DEBUG_LOCKS_WARN_ON(debug_atomic_read(nr_unused_locks) != nr_unused);
250
282
 #endif
..
..
@@ -270,9 +302,13 @@
270
302
 
271
303
 #ifdef CONFIG_PROVE_LOCKING
272
304
 	seq_printf(m, " dependency chains:             %11lu [max: %lu]\n",
273
-			nr_lock_chains, MAX_LOCKDEP_CHAINS);
274
-	seq_printf(m, " dependency chain hlocks:       %11d [max: %lu]\n",
275
-			nr_chain_hlocks, MAX_LOCKDEP_CHAIN_HLOCKS);
305
+			lock_chain_count(), MAX_LOCKDEP_CHAINS);
306
+	seq_printf(m, " dependency chain hlocks used:  %11lu [max: %lu]\n",
307
+			MAX_LOCKDEP_CHAIN_HLOCKS -
308
+			(nr_free_chain_hlocks + nr_lost_chain_hlocks),
309
+			MAX_LOCKDEP_CHAIN_HLOCKS);
310
+	seq_printf(m, " dependency chain hlocks lost:  %11u\n",
311
+			nr_lost_chain_hlocks);
276
312
 #endif
277
313
 
278
314
 #ifdef CONFIG_TRACE_IRQFLAGS
..
..
@@ -285,6 +321,12 @@
285
321
 			nr_process_chains);
286
322
 	seq_printf(m, " stack-trace entries:           %11lu [max: %lu]\n",
287
323
 			nr_stack_trace_entries, MAX_STACK_TRACE_ENTRIES);
324
+#if defined(CONFIG_TRACE_IRQFLAGS) && defined(CONFIG_PROVE_LOCKING)
325
+	seq_printf(m, " number of stack traces:        %11llu\n",
326
+		   lockdep_stack_trace_count());
327
+	seq_printf(m, " number of stack hash chains:   %11llu\n",
328
+		   lockdep_stack_hash_count());
329
+#endif
288
330
 	seq_printf(m, " combined max dependencies:     %11u\n",
289
331
 			(nr_hardirq_chains + 1) *
290
332
 			(nr_softirq_chains + 1) *
..
..
@@ -326,10 +368,24 @@
326
368
 	seq_printf(m, " max bfs queue depth:           %11u\n",
327
369
 			max_bfs_queue_depth);
328
370
 #endif
371
+	seq_printf(m, " max lock class index:          %11lu\n",
372
+			max_lock_class_idx);
329
373
 	lockdep_stats_debug_show(m);
330
374
 	seq_printf(m, " debug_locks:                   %11u\n",
331
375
 			debug_locks);
332
376
 
377
+	/*
378
+	 * Zappped classes and lockdep data buffers reuse statistics.
379
+	 */
380
+	seq_puts(m, "\n");
381
+	seq_printf(m, " zapped classes:                %11lu\n",
382
+			nr_zapped_classes);
383
+#ifdef CONFIG_PROVE_LOCKING
384
+	seq_printf(m, " zapped lock chains:            %11lu\n",
385
+			nr_zapped_lock_chains);
386
+	seq_printf(m, " large chain blocks:            %11u\n",
387
+			nr_large_chain_blocks);
388
+#endif
333
389
 	return 0;
334
390
 }
335
391
 
..
..
@@ -399,7 +455,7 @@
399
455
 
400
456
 static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
401
457
 {
402
-	struct lockdep_subclass_key *ckey;
458
+	const struct lockdep_subclass_key *ckey;
403
459
 	struct lock_class_stats *stats;
404
460
 	struct lock_class *class;
405
461
 	const char *cname;
..
..
@@ -591,12 +647,16 @@
591
647
 	if (!res) {
592
648
 		struct lock_stat_data *iter = data->stats;
593
649
 		struct seq_file *m = file->private_data;
650
+		unsigned long idx;
594
651
 
595
-		list_for_each_entry(class, &all_lock_classes, lock_entry) {
652
+		iterate_lock_classes(idx, class) {
653
+			if (!test_bit(idx, lock_classes_in_use))
654
+				continue;
596
655
 			iter->class = class;
597
656
 			iter->stats = lock_stats(class);
598
657
 			iter++;
599
658
 		}
659
+
600
660
 		data->iter_end = iter;
601
661
 
602
662
 		sort(data->stats, data->iter_end - data->stats,
..
..
@@ -614,6 +674,7 @@
614
674
 			       size_t count, loff_t *ppos)
615
675
 {
616
676
 	struct lock_class *class;
677
+	unsigned long idx;
617
678
 	char c;
618
679
 
619
680
 	if (count) {
..
..
@@ -623,8 +684,11 @@
623
684
 		if (c != '0')
624
685
 			return count;
625
686
 
626
-		list_for_each_entry(class, &all_lock_classes, lock_entry)
687
+		iterate_lock_classes(idx, class) {
688
+			if (!test_bit(idx, lock_classes_in_use))
689
+				continue;
627
690
 			clear_lock_stats(class);
691
+		}
628
692
 	}
629
693
 	return count;
630
694
 }
..
..
@@ -637,12 +701,12 @@
637
701
 	return seq_release(inode, file);
638
702
 }
639
703
 
640
-static const struct file_operations proc_lock_stat_operations = {
641
-	.open		= lock_stat_open,
642
-	.write		= lock_stat_write,
643
-	.read		= seq_read,
644
-	.llseek		= seq_lseek,
645
-	.release	= lock_stat_release,
704
+static const struct proc_ops lock_stat_proc_ops = {
705
+	.proc_open	= lock_stat_open,
706
+	.proc_write	= lock_stat_write,
707
+	.proc_read	= seq_read,
708
+	.proc_lseek	= seq_lseek,
709
+	.proc_release	= lock_stat_release,
646
710
 };
647
711
 #endif /* CONFIG_LOCK_STAT */
648
712
 
..
..
@@ -654,8 +718,7 @@
654
718
 #endif
655
719
 	proc_create_single("lockdep_stats", S_IRUSR, NULL, lockdep_stats_show);
656
720
 #ifdef CONFIG_LOCK_STAT
657
-	proc_create("lock_stat", S_IRUSR | S_IWUSR, NULL,
658
-		    &proc_lock_stat_operations);
721
+	proc_create("lock_stat", S_IRUSR | S_IWUSR, NULL, &lock_stat_proc_ops);
659
722
 #endif
660
723
 
661
724
 	return 0;