Hi Roman, [auto build test WARNING on block/for-next] [also build test WARNING on v4.7 next-20160805] [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/Roman-Pen/blk-mq-fix-hang-caused-by-freeze-unfreeze-sequence/20160806-014441 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: x86_64-randconfig-x012-201631 (attached as .config) compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from block/blk-core.c:14: block/blk-core.c: In function 'blk_queue_enter': block/blk-core.c:661:18: error: passing argument 1 of 'atomic_read' from incompatible pointer type [-Werror=incompatible-pointer-types] !atomic_read(&q->mq_freeze_depth) || ^ include/linux/compiler.h:151:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ >> include/linux/wait.h:473:2: note: in expansion of macro 'if' if (!(condition)) \ ^~ block/blk-core.c:660:9: note: in expansion of macro 'wait_event_interruptible' ret = wait_event_interruptible(q->mq_freeze_wq, ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/msr.h:66:0, from arch/x86/include/asm/processor.h:20, from arch/x86/include/asm/cpufeature.h:4, from arch/x86/include/asm/thread_info.h:52, from include/linux/thread_info.h:54, from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/linux/stat.h:18, from include/linux/module.h:10, from block/blk-core.c:15: arch/x86/include/asm/atomic.h:24:28: note: expected 'const atomic_t * {aka const struct <anonymous> *}' but argument is of type 'int *' static __always_inline int atomic_read(const atomic_t *v) ^~~~~~~~~~~ In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from block/blk-core.c:14: block/blk-core.c:661:18: error: passing argument 1 of 'atomic_read' from incompatible pointer type [-Werror=incompatible-pointer-types] !atomic_read(&q->mq_freeze_depth) || ^ include/linux/compiler.h:151:42: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ >> include/linux/wait.h:473:2: note: in expansion of macro 'if' if (!(condition)) \ ^~ block/blk-core.c:660:9: note: in expansion of macro 'wait_event_interruptible' ret = wait_event_interruptible(q->mq_freeze_wq, ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/msr.h:66:0, from arch/x86/include/asm/processor.h:20, from arch/x86/include/asm/cpufeature.h:4, from arch/x86/include/asm/thread_info.h:52, from include/linux/thread_info.h:54, from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/linux/stat.h:18, from include/linux/module.h:10, from block/blk-core.c:15: arch/x86/include/asm/atomic.h:24:28: note: expected 'const atomic_t * {aka const struct <anonymous> *}' but argument is of type 'int *' static __always_inline int atomic_read(const atomic_t *v) ^~~~~~~~~~~ In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from block/blk-core.c:14: block/blk-core.c:661:18: error: passing argument 1 of 'atomic_read' from incompatible pointer type [-Werror=incompatible-pointer-types] !atomic_read(&q->mq_freeze_depth) || ^ include/linux/compiler.h:162:16: note: in definition of macro '__trace_if' ______r = !!(cond); \ ^~~~ >> include/linux/wait.h:473:2: note: in expansion of macro 'if' if (!(condition)) \ ^~ block/blk-core.c:660:9: note: in expansion of macro 'wait_event_interruptible' ret = wait_event_interruptible(q->mq_freeze_wq, ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/msr.h:66:0, from arch/x86/include/asm/processor.h:20, from arch/x86/include/asm/cpufeature.h:4, from arch/x86/include/asm/thread_info.h:52, from include/linux/thread_info.h:54, from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/linux/stat.h:18, from include/linux/module.h:10, from block/blk-core.c:15: arch/x86/include/asm/atomic.h:24:28: note: expected 'const atomic_t * {aka const struct <anonymous> *}' but argument is of type 'int *' static __always_inline int atomic_read(const atomic_t *v) ^~~~~~~~~~~ In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from block/blk-core.c:14: block/blk-core.c:661:18: error: passing argument 1 of 'atomic_read' from incompatible pointer type [-Werror=incompatible-pointer-types] !atomic_read(&q->mq_freeze_depth) || ^ include/linux/compiler.h:151:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ include/linux/wait.h:278:3: note: in expansion of macro 'if' if (condition) \ ^~ >> include/linux/wait.h:451:2: note: in expansion of macro '___wait_event' ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 0, 0, \ ^~~~~~~~~~~~~ include/linux/wait.h:474:11: note: in expansion of macro '__wait_event_interruptible' __ret = __wait_event_interruptible(wq, condition); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~ block/blk-core.c:660:9: note: in expansion of macro 'wait_event_interruptible' ret = wait_event_interruptible(q->mq_freeze_wq, ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/msr.h:66:0, from arch/x86/include/asm/processor.h:20, from arch/x86/include/asm/cpufeature.h:4, from arch/x86/include/asm/thread_info.h:52, from include/linux/thread_info.h:54, from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/linux/stat.h:18, from include/linux/module.h:10, from block/blk-core.c:15: arch/x86/include/asm/atomic.h:24:28: note: expected 'const atomic_t * {aka const struct <anonymous> *}' but argument is of type 'int *' static __always_inline int atomic_read(const atomic_t *v) ^~~~~~~~~~~ In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from block/blk-core.c:14: block/blk-core.c:661:18: error: passing argument 1 of 'atomic_read' from incompatible pointer type [-Werror=incompatible-pointer-types] !atomic_read(&q->mq_freeze_depth) || ^ include/linux/compiler.h:151:42: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ include/linux/wait.h:278:3: note: in expansion of macro 'if' if (condition) \ ^~ >> include/linux/wait.h:451:2: note: in expansion of macro '___wait_event' ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 0, 0, \ ^~~~~~~~~~~~~ include/linux/wait.h:474:11: note: in expansion of macro '__wait_event_interruptible' __ret = __wait_event_interruptible(wq, condition); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~ block/blk-core.c:660:9: note: in expansion of macro 'wait_event_interruptible' ret = wait_event_interruptible(q->mq_freeze_wq, ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/msr.h:66:0, from arch/x86/include/asm/processor.h:20, from arch/x86/include/asm/cpufeature.h:4, from arch/x86/include/asm/thread_info.h:52, from include/linux/thread_info.h:54, from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/linux/stat.h:18, from include/linux/module.h:10, from block/blk-core.c:15: arch/x86/include/asm/atomic.h:24:28: note: expected 'const atomic_t * {aka const struct <anonymous> *}' but argument is of type 'int *' static __always_inline int atomic_read(const atomic_t *v) ^~~~~~~~~~~ In file included from include/linux/linkage.h:4:0, from include/linux/kernel.h:6, from block/blk-core.c:14: block/blk-core.c:661:18: error: passing argument 1 of 'atomic_read' from incompatible pointer type [-Werror=incompatible-pointer-types] !atomic_read(&q->mq_freeze_depth) || ^ include/linux/compiler.h:162:16: note: in definition of macro '__trace_if' ______r = !!(cond); \ ^~~~ include/linux/wait.h:278:3: note: in expansion of macro 'if' if (condition) \ ^~ >> include/linux/wait.h:451:2: note: in expansion of macro '___wait_event' ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 0, 0, \ ^~~~~~~~~~~~~ include/linux/wait.h:474:11: note: in expansion of macro '__wait_event_interruptible' __ret = __wait_event_interruptible(wq, condition); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~ block/blk-core.c:660:9: note: in expansion of macro 'wait_event_interruptible' ret = wait_event_interruptible(q->mq_freeze_wq, ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/msr.h:66:0, from arch/x86/include/asm/processor.h:20, from arch/x86/include/asm/cpufeature.h:4, from arch/x86/include/asm/thread_info.h:52, from include/linux/thread_info.h:54, from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/linux/stat.h:18, from include/linux/module.h:10, from block/blk-core.c:15: arch/x86/include/asm/atomic.h:24:28: note: expected 'const atomic_t * {aka const struct <anonymous> *}' but argument is of type 'int *' static __always_inline int atomic_read(const atomic_t *v) ^~~~~~~~~~~ cc1: some warnings being treated as errors vim +/if +473 include/linux/wait.h 41a1431b1 Peter Zijlstra 2013-10-02 272 else \ c2d816443 Oleg Nesterov 2013-10-07 273 __wait.flags = 0; \ c2d816443 Oleg Nesterov 2013-10-07 274 \ c2d816443 Oleg Nesterov 2013-10-07 275 for (;;) { \ c2d816443 Oleg Nesterov 2013-10-07 276 long __int = prepare_to_wait_event(&wq, &__wait, state);\ 41a1431b1 Peter Zijlstra 2013-10-02 277 \ 41a1431b1 Peter Zijlstra 2013-10-02 @278 if (condition) \ 41a1431b1 Peter Zijlstra 2013-10-02 279 break; \ 41a1431b1 Peter Zijlstra 2013-10-02 280 \ c2d816443 Oleg Nesterov 2013-10-07 281 if (___wait_is_interruptible(state) && __int) { \ c2d816443 Oleg Nesterov 2013-10-07 282 __ret = __int; \ 41a1431b1 Peter Zijlstra 2013-10-02 283 if (exclusive) { \ 41a1431b1 Peter Zijlstra 2013-10-02 284 abort_exclusive_wait(&wq, &__wait, \ 41a1431b1 Peter Zijlstra 2013-10-02 285 state, NULL); \ 41a1431b1 Peter Zijlstra 2013-10-02 286 goto __out; \ 41a1431b1 Peter Zijlstra 2013-10-02 287 } \ 41a1431b1 Peter Zijlstra 2013-10-02 288 break; \ 41a1431b1 Peter Zijlstra 2013-10-02 289 } \ 41a1431b1 Peter Zijlstra 2013-10-02 290 \ 41a1431b1 Peter Zijlstra 2013-10-02 291 cmd; \ 41a1431b1 Peter Zijlstra 2013-10-02 292 } \ 41a1431b1 Peter Zijlstra 2013-10-02 293 finish_wait(&wq, &__wait); \ 35a2af94c Peter Zijlstra 2013-10-02 294 __out: __ret; \ 35a2af94c Peter Zijlstra 2013-10-02 295 }) 41a1431b1 Peter Zijlstra 2013-10-02 296 ^1da177e4 Linus Torvalds 2005-04-16 297 #define __wait_event(wq, condition) \ 35a2af94c Peter Zijlstra 2013-10-02 298 (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0, 0, \ 35a2af94c Peter Zijlstra 2013-10-02 299 schedule()) ^1da177e4 Linus Torvalds 2005-04-16 300 ^1da177e4 Linus Torvalds 2005-04-16 301 /** ^1da177e4 Linus Torvalds 2005-04-16 302 * wait_event - sleep until a condition gets true ^1da177e4 Linus Torvalds 2005-04-16 303 * @wq: the waitqueue to wait on ^1da177e4 Linus Torvalds 2005-04-16 304 * @condition: a C expression for the event to wait for ^1da177e4 Linus Torvalds 2005-04-16 305 * ^1da177e4 Linus Torvalds 2005-04-16 306 * The process is put to sleep (TASK_UNINTERRUPTIBLE) until the ^1da177e4 Linus Torvalds 2005-04-16 307 * @condition evaluates to true. The @condition is checked each time ^1da177e4 Linus Torvalds 2005-04-16 308 * the waitqueue @wq is woken up. ^1da177e4 Linus Torvalds 2005-04-16 309 * ^1da177e4 Linus Torvalds 2005-04-16 310 * wake_up() has to be called after changing any variable that could ^1da177e4 Linus Torvalds 2005-04-16 311 * change the result of the wait condition. ^1da177e4 Linus Torvalds 2005-04-16 312 */ ^1da177e4 Linus Torvalds 2005-04-16 313 #define wait_event(wq, condition) \ ^1da177e4 Linus Torvalds 2005-04-16 314 do { \ e22b886a8 Peter Zijlstra 2014-09-24 315 might_sleep(); \ ^1da177e4 Linus Torvalds 2005-04-16 316 if (condition) \ ^1da177e4 Linus Torvalds 2005-04-16 317 break; \ ^1da177e4 Linus Torvalds 2005-04-16 318 __wait_event(wq, condition); \ ^1da177e4 Linus Torvalds 2005-04-16 319 } while (0) ^1da177e4 Linus Torvalds 2005-04-16 320 2c5612465 Peter Zijlstra 2015-02-03 321 #define __io_wait_event(wq, condition) \ 2c5612465 Peter Zijlstra 2015-02-03 322 (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0, 0, \ 2c5612465 Peter Zijlstra 2015-02-03 323 io_schedule()) 2c5612465 Peter Zijlstra 2015-02-03 324 2c5612465 Peter Zijlstra 2015-02-03 325 /* 2c5612465 Peter Zijlstra 2015-02-03 326 * io_wait_event() -- like wait_event() but with io_schedule() 2c5612465 Peter Zijlstra 2015-02-03 327 */ 2c5612465 Peter Zijlstra 2015-02-03 328 #define io_wait_event(wq, condition) \ 2c5612465 Peter Zijlstra 2015-02-03 329 do { \ 2c5612465 Peter Zijlstra 2015-02-03 330 might_sleep(); \ 2c5612465 Peter Zijlstra 2015-02-03 331 if (condition) \ 2c5612465 Peter Zijlstra 2015-02-03 332 break; \ 2c5612465 Peter Zijlstra 2015-02-03 333 __io_wait_event(wq, condition); \ 2c5612465 Peter Zijlstra 2015-02-03 334 } while (0) 2c5612465 Peter Zijlstra 2015-02-03 335 36df04bc5 Peter Zijlstra 2014-10-29 336 #define __wait_event_freezable(wq, condition) \ 36df04bc5 Peter Zijlstra 2014-10-29 337 ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 0, 0, \ 36df04bc5 Peter Zijlstra 2014-10-29 338 schedule(); try_to_freeze()) 36df04bc5 Peter Zijlstra 2014-10-29 339 36df04bc5 Peter Zijlstra 2014-10-29 340 /** f4bcfa1da Stafford Horne 2016-02-23 341 * wait_event_freezable - sleep (or freeze) until a condition gets true 36df04bc5 Peter Zijlstra 2014-10-29 342 * @wq: the waitqueue to wait on 36df04bc5 Peter Zijlstra 2014-10-29 343 * @condition: a C expression for the event to wait for 36df04bc5 Peter Zijlstra 2014-10-29 344 * 36df04bc5 Peter Zijlstra 2014-10-29 345 * The process is put to sleep (TASK_INTERRUPTIBLE -- so as not to contribute 36df04bc5 Peter Zijlstra 2014-10-29 346 * to system load) until the @condition evaluates to true. The 36df04bc5 Peter Zijlstra 2014-10-29 347 * @condition is checked each time the waitqueue @wq is woken up. 36df04bc5 Peter Zijlstra 2014-10-29 348 * 36df04bc5 Peter Zijlstra 2014-10-29 349 * wake_up() has to be called after changing any variable that could 36df04bc5 Peter Zijlstra 2014-10-29 350 * change the result of the wait condition. 36df04bc5 Peter Zijlstra 2014-10-29 351 */ 36df04bc5 Peter Zijlstra 2014-10-29 352 #define wait_event_freezable(wq, condition) \ 36df04bc5 Peter Zijlstra 2014-10-29 353 ({ \ 36df04bc5 Peter Zijlstra 2014-10-29 354 int __ret = 0; \ 36df04bc5 Peter Zijlstra 2014-10-29 355 might_sleep(); \ 36df04bc5 Peter Zijlstra 2014-10-29 356 if (!(condition)) \ 36df04bc5 Peter Zijlstra 2014-10-29 357 __ret = __wait_event_freezable(wq, condition); \ 36df04bc5 Peter Zijlstra 2014-10-29 358 __ret; \ 36df04bc5 Peter Zijlstra 2014-10-29 359 }) 36df04bc5 Peter Zijlstra 2014-10-29 360 35a2af94c Peter Zijlstra 2013-10-02 361 #define __wait_event_timeout(wq, condition, timeout) \ 35a2af94c Peter Zijlstra 2013-10-02 362 ___wait_event(wq, ___wait_cond_timeout(condition), \ 35a2af94c Peter Zijlstra 2013-10-02 363 TASK_UNINTERRUPTIBLE, 0, timeout, \ 35a2af94c Peter Zijlstra 2013-10-02 364 __ret = schedule_timeout(__ret)) ^1da177e4 Linus Torvalds 2005-04-16 365 ^1da177e4 Linus Torvalds 2005-04-16 366 /** ^1da177e4 Linus Torvalds 2005-04-16 367 * wait_event_timeout - sleep until a condition gets true or a timeout elapses ^1da177e4 Linus Torvalds 2005-04-16 368 * @wq: the waitqueue to wait on ^1da177e4 Linus Torvalds 2005-04-16 369 * @condition: a C expression for the event to wait for ^1da177e4 Linus Torvalds 2005-04-16 370 * @timeout: timeout, in jiffies ^1da177e4 Linus Torvalds 2005-04-16 371 * ^1da177e4 Linus Torvalds 2005-04-16 372 * The process is put to sleep (TASK_UNINTERRUPTIBLE) until the ^1da177e4 Linus Torvalds 2005-04-16 373 * @condition evaluates to true. The @condition is checked each time ^1da177e4 Linus Torvalds 2005-04-16 374 * the waitqueue @wq is woken up. ^1da177e4 Linus Torvalds 2005-04-16 375 * ^1da177e4 Linus Torvalds 2005-04-16 376 * wake_up() has to be called after changing any variable that could ^1da177e4 Linus Torvalds 2005-04-16 377 * change the result of the wait condition. ^1da177e4 Linus Torvalds 2005-04-16 378 * 6b44f5190 Scot Doyle 2014-08-24 379 * Returns: 6b44f5190 Scot Doyle 2014-08-24 380 * 0 if the @condition evaluated to %false after the @timeout elapsed, 6b44f5190 Scot Doyle 2014-08-24 381 * 1 if the @condition evaluated to %true after the @timeout elapsed, 6b44f5190 Scot Doyle 2014-08-24 382 * or the remaining jiffies (at least 1) if the @condition evaluated 6b44f5190 Scot Doyle 2014-08-24 383 * to %true before the @timeout elapsed. ^1da177e4 Linus Torvalds 2005-04-16 384 */ ^1da177e4 Linus Torvalds 2005-04-16 385 #define wait_event_timeout(wq, condition, timeout) \ ^1da177e4 Linus Torvalds 2005-04-16 386 ({ \ ^1da177e4 Linus Torvalds 2005-04-16 387 long __ret = timeout; \ e22b886a8 Peter Zijlstra 2014-09-24 388 might_sleep(); \ 8922915b3 Oleg Nesterov 2013-10-07 389 if (!___wait_cond_timeout(condition)) \ 35a2af94c Peter Zijlstra 2013-10-02 390 __ret = __wait_event_timeout(wq, condition, timeout); \ ^1da177e4 Linus Torvalds 2005-04-16 391 __ret; \ ^1da177e4 Linus Torvalds 2005-04-16 392 }) ^1da177e4 Linus Torvalds 2005-04-16 393 36df04bc5 Peter Zijlstra 2014-10-29 394 #define __wait_event_freezable_timeout(wq, condition, timeout) \ 36df04bc5 Peter Zijlstra 2014-10-29 395 ___wait_event(wq, ___wait_cond_timeout(condition), \ 36df04bc5 Peter Zijlstra 2014-10-29 396 TASK_INTERRUPTIBLE, 0, timeout, \ 36df04bc5 Peter Zijlstra 2014-10-29 397 __ret = schedule_timeout(__ret); try_to_freeze()) 36df04bc5 Peter Zijlstra 2014-10-29 398 36df04bc5 Peter Zijlstra 2014-10-29 399 /* 36df04bc5 Peter Zijlstra 2014-10-29 400 * like wait_event_timeout() -- except it uses TASK_INTERRUPTIBLE to avoid 36df04bc5 Peter Zijlstra 2014-10-29 401 * increasing load and is freezable. 36df04bc5 Peter Zijlstra 2014-10-29 402 */ 36df04bc5 Peter Zijlstra 2014-10-29 403 #define wait_event_freezable_timeout(wq, condition, timeout) \ 36df04bc5 Peter Zijlstra 2014-10-29 404 ({ \ 36df04bc5 Peter Zijlstra 2014-10-29 405 long __ret = timeout; \ 36df04bc5 Peter Zijlstra 2014-10-29 406 might_sleep(); \ 36df04bc5 Peter Zijlstra 2014-10-29 407 if (!___wait_cond_timeout(condition)) \ 36df04bc5 Peter Zijlstra 2014-10-29 408 __ret = __wait_event_freezable_timeout(wq, condition, timeout); \ 36df04bc5 Peter Zijlstra 2014-10-29 409 __ret; \ 36df04bc5 Peter Zijlstra 2014-10-29 410 }) 36df04bc5 Peter Zijlstra 2014-10-29 411 9f3520c31 Yuanhan Liu 2015-05-08 412 #define __wait_event_exclusive_cmd(wq, condition, cmd1, cmd2) \ 9f3520c31 Yuanhan Liu 2015-05-08 413 (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 1, 0, \ 9f3520c31 Yuanhan Liu 2015-05-08 414 cmd1; schedule(); cmd2) 9f3520c31 Yuanhan Liu 2015-05-08 415 /* 9f3520c31 Yuanhan Liu 2015-05-08 416 * Just like wait_event_cmd(), except it sets exclusive flag 9f3520c31 Yuanhan Liu 2015-05-08 417 */ 9f3520c31 Yuanhan Liu 2015-05-08 418 #define wait_event_exclusive_cmd(wq, condition, cmd1, cmd2) \ 9f3520c31 Yuanhan Liu 2015-05-08 419 do { \ 9f3520c31 Yuanhan Liu 2015-05-08 420 if (condition) \ 9f3520c31 Yuanhan Liu 2015-05-08 421 break; \ 9f3520c31 Yuanhan Liu 2015-05-08 422 __wait_event_exclusive_cmd(wq, condition, cmd1, cmd2); \ 9f3520c31 Yuanhan Liu 2015-05-08 423 } while (0) 9f3520c31 Yuanhan Liu 2015-05-08 424 82e06c811 Shaohua Li 2013-11-14 425 #define __wait_event_cmd(wq, condition, cmd1, cmd2) \ 82e06c811 Shaohua Li 2013-11-14 426 (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0, 0, \ 82e06c811 Shaohua Li 2013-11-14 427 cmd1; schedule(); cmd2) 82e06c811 Shaohua Li 2013-11-14 428 82e06c811 Shaohua Li 2013-11-14 429 /** 82e06c811 Shaohua Li 2013-11-14 430 * wait_event_cmd - sleep until a condition gets true 82e06c811 Shaohua Li 2013-11-14 431 * @wq: the waitqueue to wait on 82e06c811 Shaohua Li 2013-11-14 432 * @condition: a C expression for the event to wait for f434f7afa Masanari Iida 2014-01-22 433 * @cmd1: the command will be executed before sleep f434f7afa Masanari Iida 2014-01-22 434 * @cmd2: the command will be executed after sleep 82e06c811 Shaohua Li 2013-11-14 435 * 82e06c811 Shaohua Li 2013-11-14 436 * The process is put to sleep (TASK_UNINTERRUPTIBLE) until the 82e06c811 Shaohua Li 2013-11-14 437 * @condition evaluates to true. The @condition is checked each time 82e06c811 Shaohua Li 2013-11-14 438 * the waitqueue @wq is woken up. 82e06c811 Shaohua Li 2013-11-14 439 * 82e06c811 Shaohua Li 2013-11-14 440 * wake_up() has to be called after changing any variable that could 82e06c811 Shaohua Li 2013-11-14 441 * change the result of the wait condition. 82e06c811 Shaohua Li 2013-11-14 442 */ 82e06c811 Shaohua Li 2013-11-14 443 #define wait_event_cmd(wq, condition, cmd1, cmd2) \ 82e06c811 Shaohua Li 2013-11-14 444 do { \ 82e06c811 Shaohua Li 2013-11-14 445 if (condition) \ 82e06c811 Shaohua Li 2013-11-14 446 break; \ 82e06c811 Shaohua Li 2013-11-14 447 __wait_event_cmd(wq, condition, cmd1, cmd2); \ 82e06c811 Shaohua Li 2013-11-14 448 } while (0) 82e06c811 Shaohua Li 2013-11-14 449 35a2af94c Peter Zijlstra 2013-10-02 450 #define __wait_event_interruptible(wq, condition) \ 35a2af94c Peter Zijlstra 2013-10-02 @451 ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 0, 0, \ f13f4c41c Peter Zijlstra 2013-10-02 452 schedule()) ^1da177e4 Linus Torvalds 2005-04-16 453 ^1da177e4 Linus Torvalds 2005-04-16 454 /** ^1da177e4 Linus Torvalds 2005-04-16 455 * wait_event_interruptible - sleep until a condition gets true ^1da177e4 Linus Torvalds 2005-04-16 456 * @wq: the waitqueue to wait on ^1da177e4 Linus Torvalds 2005-04-16 457 * @condition: a C expression for the event to wait for ^1da177e4 Linus Torvalds 2005-04-16 458 * ^1da177e4 Linus Torvalds 2005-04-16 459 * The process is put to sleep (TASK_INTERRUPTIBLE) until the ^1da177e4 Linus Torvalds 2005-04-16 460 * @condition evaluates to true or a signal is received. ^1da177e4 Linus Torvalds 2005-04-16 461 * The @condition is checked each time the waitqueue @wq is woken up. ^1da177e4 Linus Torvalds 2005-04-16 462 * ^1da177e4 Linus Torvalds 2005-04-16 463 * wake_up() has to be called after changing any variable that could ^1da177e4 Linus Torvalds 2005-04-16 464 * change the result of the wait condition. ^1da177e4 Linus Torvalds 2005-04-16 465 * ^1da177e4 Linus Torvalds 2005-04-16 466 * The function will return -ERESTARTSYS if it was interrupted by a ^1da177e4 Linus Torvalds 2005-04-16 467 * signal and 0 if @condition evaluated to true. ^1da177e4 Linus Torvalds 2005-04-16 468 */ ^1da177e4 Linus Torvalds 2005-04-16 469 #define wait_event_interruptible(wq, condition) \ ^1da177e4 Linus Torvalds 2005-04-16 470 ({ \ ^1da177e4 Linus Torvalds 2005-04-16 471 int __ret = 0; \ e22b886a8 Peter Zijlstra 2014-09-24 472 might_sleep(); \ ^1da177e4 Linus Torvalds 2005-04-16 @473 if (!(condition)) \ 35a2af94c Peter Zijlstra 2013-10-02 474 __ret = __wait_event_interruptible(wq, condition); \ ^1da177e4 Linus Torvalds 2005-04-16 475 __ret; \ ^1da177e4 Linus Torvalds 2005-04-16 476 }) :::::: The code at line 473 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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