Hello Andrew Morton,
The patch 680a50c9271b: "kernel/locking/lockdep.c: convert hash
tables to hlists" from Feb 4, 2016, leads to the following static
checker warning:
kernel/locking/lockdep.c:3933 lockdep_free_key_range()
warn: 'head' can't be NULL.
kernel/locking/lockdep.c
3928 /*
3929 * Unhash all classes that were created by this module:
3930 */
3931 for (i = 0; i < CLASSHASH_SIZE; i++) {
3932 head = classhash_table + i;
3933 if (!head)
classhash_table is an array.
3934 continue;
3935 hlist_for_each_entry_rcu(class, head, hash_entry) {
3936 if (within(class->key, start, size))
3937 zap_class(class);
3938 else if (within(class->name, start, size))
3939 zap_class(class);
3940 }
3941 }
Also:
kernel/locking/lockdep.c:3990 lockdep_reset_lock() warn: 'head' can't be NULL.
regards,
dan carpenter
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