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SubjectRe: [PATCH v1 1/2] tracing: Improve design of preemptirq tracepoints and its users
Hi Joel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.16-rc5 next-20180314]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Joel-Fernandes/tracing-Improve-design-of-preemptirq-tracepoints-and-its-users/20180316-012211
config: i386-randconfig-a1-201810 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All errors (new ones prefixed by >>):

kernel/locking/lockdep.c: In function 'lockdep_init':
>> kernel/locking/lockdep.c:4325:2: error: implicit declaration of function 'register_trace_irq_disable' [-Werror=implicit-function-declaration]
register_trace_irq_disable(lockdep_hardirqs_off, NULL);
^
>> kernel/locking/lockdep.c:4326:2: error: implicit declaration of function 'register_trace_irq_enable' [-Werror=implicit-function-declaration]
register_trace_irq_enable(lockdep_hardirqs_on, NULL);
^
cc1: some warnings being treated as errors

vim +/register_trace_irq_disable +4325 kernel/locking/lockdep.c

4321
4322 void __init lockdep_init(void)
4323 {
4324 #ifdef CONFIG_PROVE_LOCKING
> 4325 register_trace_irq_disable(lockdep_hardirqs_off, NULL);
> 4326 register_trace_irq_enable(lockdep_hardirqs_on, NULL);
4327 #endif
4328 printk("Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar\n");
4329
4330 printk("... MAX_LOCKDEP_SUBCLASSES: %lu\n", MAX_LOCKDEP_SUBCLASSES);
4331 printk("... MAX_LOCK_DEPTH: %lu\n", MAX_LOCK_DEPTH);
4332 printk("... MAX_LOCKDEP_KEYS: %lu\n", MAX_LOCKDEP_KEYS);
4333 printk("... CLASSHASH_SIZE: %lu\n", CLASSHASH_SIZE);
4334 printk("... MAX_LOCKDEP_ENTRIES: %lu\n", MAX_LOCKDEP_ENTRIES);
4335 printk("... MAX_LOCKDEP_CHAINS: %lu\n", MAX_LOCKDEP_CHAINS);
4336 printk("... CHAINHASH_SIZE: %lu\n", CHAINHASH_SIZE);
4337
4338 printk(" memory used by lock dependency info: %lu kB\n",
4339 (sizeof(struct lock_class) * MAX_LOCKDEP_KEYS +
4340 sizeof(struct list_head) * CLASSHASH_SIZE +
4341 sizeof(struct lock_list) * MAX_LOCKDEP_ENTRIES +
4342 sizeof(struct lock_chain) * MAX_LOCKDEP_CHAINS +
4343 sizeof(struct list_head) * CHAINHASH_SIZE
4344 #ifdef CONFIG_PROVE_LOCKING
4345 + sizeof(struct circular_queue)
4346 #endif
4347 ) / 1024
4348 );
4349
4350 printk(" per task-struct memory footprint: %lu bytes\n",
4351 sizeof(struct held_lock) * MAX_LOCK_DEPTH);
4352 }
4353

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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