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Date: Tue, 17 Jan 2017 02:09:38 +0800
From: kbuild test robot <lkp@...el.com>
To: Dmitry Vyukov <dvyukov@...gle.com>
Cc: kbuild-all@...org, davej@...hat.com, samuel@...tiz.org,
davem@...emloft.net, glider@...gle.com, andreyknvl@...gle.com,
Dmitry Vyukov <dvyukov@...gle.com>, netdev@...r.kernel.org
Subject: Re: [PATCH v2] net/irda: fix lockdep annotation
Hi Dmitry,
[auto build test ERROR on tip/locking/core]
[also build test ERROR on v4.10-rc4 next-20170116]
[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/Dmitry-Vyukov/net-irda-fix-lockdep-annotation/20170117-001737
config: i386-defconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All error/warnings (new ones prefixed by >>):
In file included from include/linux/mmzone.h:7:0,
from include/linux/gfp.h:5,
from include/linux/slab.h:14,
from drivers/gpu/drm/i915/i915_sw_fence.c:10:
drivers/gpu/drm/i915/i915_sw_fence.c: In function '__i915_sw_fence_wake_up_all':
>> include/linux/spinlock.h:217:3: error: void value not ignored as it ought to be
(void)subclass; \
>> include/linux/spinlock.h:335:2: note: in expansion of macro 'raw_spin_lock_irqsave_nested'
raw_spin_lock_irqsave_nested(spinlock_check(lock), flags, subclass); \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/i915/i915_sw_fence.c:68:2: note: in expansion of macro 'spin_lock_irqsave_nested'
spin_lock_irqsave_nested(&x->lock, flags, 1 + !!continuation);
^~~~~~~~~~~~~~~~~~~~~~~~
vim +217 include/linux/spinlock.h
211 typecheck(unsigned long, flags); \
212 flags = _raw_spin_lock_irqsave_nested(lock, subclass); \
213 } while (0)
214 #else
215 #define raw_spin_lock_irqsave_nested(lock, flags, subclass) \
216 do { \
> 217 (void)subclass; \
218 typecheck(unsigned long, flags); \
219 flags = _raw_spin_lock_irqsave(lock); \
220 } while (0)
221 #endif
222
223 #else
224
225 #define raw_spin_lock_irqsave(lock, flags) \
226 do { \
227 typecheck(unsigned long, flags); \
228 _raw_spin_lock_irqsave(lock, flags); \
229 } while (0)
230
231 #define raw_spin_lock_irqsave_nested(lock, flags, subclass) \
232 raw_spin_lock_irqsave(lock, flags)
233
234 #endif
235
236 #define raw_spin_lock_irq(lock) _raw_spin_lock_irq(lock)
237 #define raw_spin_lock_bh(lock) _raw_spin_lock_bh(lock)
238 #define raw_spin_unlock(lock) _raw_spin_unlock(lock)
239 #define raw_spin_unlock_irq(lock) _raw_spin_unlock_irq(lock)
240
241 #define raw_spin_unlock_irqrestore(lock, flags) \
242 do { \
243 typecheck(unsigned long, flags); \
244 _raw_spin_unlock_irqrestore(lock, flags); \
245 } while (0)
246 #define raw_spin_unlock_bh(lock) _raw_spin_unlock_bh(lock)
247
248 #define raw_spin_trylock_bh(lock) \
249 __cond_lock(lock, _raw_spin_trylock_bh(lock))
250
251 #define raw_spin_trylock_irq(lock) \
252 ({ \
253 local_irq_disable(); \
254 raw_spin_trylock(lock) ? \
255 1 : ({ local_irq_enable(); 0; }); \
256 })
257
258 #define raw_spin_trylock_irqsave(lock, flags) \
259 ({ \
260 local_irq_save(flags); \
261 raw_spin_trylock(lock) ? \
262 1 : ({ local_irq_restore(flags); 0; }); \
263 })
264
265 /**
266 * raw_spin_can_lock - would raw_spin_trylock() succeed?
267 * @lock: the spinlock in question.
268 */
269 #define raw_spin_can_lock(lock) (!raw_spin_is_locked(lock))
270
271 /* Include rwlock functions */
272 #include <linux/rwlock.h>
273
274 /*
275 * Pull the _spin_*()/_read_*()/_write_*() functions/declarations:
276 */
277 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
278 # include <linux/spinlock_api_smp.h>
279 #else
280 # include <linux/spinlock_api_up.h>
281 #endif
282
283 /*
284 * Map the spin_lock functions to the raw variants for PREEMPT_RT=n
285 */
286
287 static __always_inline raw_spinlock_t *spinlock_check(spinlock_t *lock)
288 {
289 return &lock->rlock;
290 }
291
292 #define spin_lock_init(_lock) \
293 do { \
294 spinlock_check(_lock); \
295 raw_spin_lock_init(&(_lock)->rlock); \
296 } while (0)
297
298 static __always_inline void spin_lock(spinlock_t *lock)
299 {
300 raw_spin_lock(&lock->rlock);
301 }
302
303 static __always_inline void spin_lock_bh(spinlock_t *lock)
304 {
305 raw_spin_lock_bh(&lock->rlock);
306 }
307
308 static __always_inline int spin_trylock(spinlock_t *lock)
309 {
310 return raw_spin_trylock(&lock->rlock);
311 }
312
313 #define spin_lock_nested(lock, subclass) \
314 do { \
315 raw_spin_lock_nested(spinlock_check(lock), subclass); \
316 } while (0)
317
318 #define spin_lock_nest_lock(lock, nest_lock) \
319 do { \
320 raw_spin_lock_nest_lock(spinlock_check(lock), nest_lock); \
321 } while (0)
322
323 static __always_inline void spin_lock_irq(spinlock_t *lock)
324 {
325 raw_spin_lock_irq(&lock->rlock);
326 }
327
328 #define spin_lock_irqsave(lock, flags) \
329 do { \
330 raw_spin_lock_irqsave(spinlock_check(lock), flags); \
331 } while (0)
332
333 #define spin_lock_irqsave_nested(lock, flags, subclass) \
334 do { \
> 335 raw_spin_lock_irqsave_nested(spinlock_check(lock), flags, subclass); \
336 } while (0)
337
338 static __always_inline void spin_unlock(spinlock_t *lock)
---
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