Hi Christian, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v4.16-rc2 next-20180220] [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/Christian-K-nig/locking-ww_mutex-add-ww_mutex_is_owned_by-function-v4/20180221-021317 config: i386-tinyconfig (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 All error/warnings (new ones prefixed by >>): In file included from kernel/locking/mutex.c:21:0: include/linux/ww_mutex.h: In function 'ww_mutex_is_owned_by': >> include/linux/ww_mutex.h:380:0: error: unterminated argument list invoking macro "likely" #endif >> include/linux/ww_mutex.h:377:3: error: 'likely' undeclared (first use in this function) likely(READ_ONCE(lock->ctx) == NULL; ^~~~~~ include/linux/ww_mutex.h:377:3: note: each undeclared identifier is reported only once for each function it appears in In file included from include/linux/thread_info.h:13:0, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:81, from include/linux/rcupdate.h:40, from include/linux/rculist.h:11, from include/linux/sched/signal.h:5, from kernel/locking/mutex.c:22: >> include/linux/restart_block.h:11:1: error: expected ';' before 'struct' struct timespec; ^~~~~~ >> include/linux/restart_block.h:12:1: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] struct compat_timespec; ^~~~~~ In file included from include/linux/thread_info.h:38:0, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:81, from include/linux/rcupdate.h:40, from include/linux/rculist.h:11, from include/linux/sched/signal.h:5, from kernel/locking/mutex.c:22: >> arch/x86/include/asm/thread_info.h:170:19: error: invalid storage class for function 'arch_within_stack_frames' static inline int arch_within_stack_frames(const void * const stack, ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/preempt.h:7:0, from include/linux/preempt.h:81, from include/linux/rcupdate.h:40, from include/linux/rculist.h:11, from include/linux/sched/signal.h:5, from kernel/locking/mutex.c:22: >> include/linux/thread_info.h:57:20: error: invalid storage class for function 'set_ti_thread_flag' static inline void set_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:62:20: error: invalid storage class for function 'clear_ti_thread_flag' static inline void clear_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:67:19: error: invalid storage class for function 'test_and_set_ti_thread_flag' static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:72:19: error: invalid storage class for function 'test_and_clear_ti_thread_flag' static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:77:19: error: invalid storage class for function 'test_ti_thread_flag' static inline int test_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:115:20: error: invalid storage class for function 'check_object_size' static inline void check_object_size(const void *ptr, unsigned long n, ^~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:125:20: error: invalid storage class for function 'copy_overflow' static inline void copy_overflow(int size, unsigned long count) ^~~~~~~~~~~~~ >> include/linux/thread_info.h:131:1: error: invalid storage class for function 'check_copy_size' check_copy_size(const void *addr, size_t bytes, bool is_source) ^~~~~~~~~~~~~~~ In file included from include/asm-generic/percpu.h:7:0, from arch/x86/include/asm/percpu.h:543, from arch/x86/include/asm/current.h:6, from include/linux/mutex.h:14, from kernel/locking/mutex.c:20: >> arch/x86/include/asm/preempt.h:9:22: error: section attribute cannot be specified for local variables DECLARE_PER_CPU(int, __preempt_count); ^ include/linux/percpu-defs.h:101:44: note: in definition of macro 'DECLARE_PER_CPU_SECTION' extern __PCPU_ATTRS(sec) __typeof__(type) name ^~~~ >> arch/x86/include/asm/preempt.h:9:1: note: in expansion of macro 'DECLARE_PER_CPU' DECLARE_PER_CPU(int, __preempt_count); ^~~~~~~~~~~~~~~ In file included from include/linux/preempt.h:81:0, from include/linux/rcupdate.h:40, from include/linux/rculist.h:11, from include/linux/sched/signal.h:5, from kernel/locking/mutex.c:22: >> arch/x86/include/asm/preempt.h:21:28: error: invalid storage class for function 'preempt_count' static __always_inline int preempt_count(void) ^~~~~~~~~~~~~ >> arch/x86/include/asm/preempt.h:26:29: error: invalid storage class for function 'preempt_count_set' static __always_inline void preempt_count_set(int pc) ^~~~~~~~~~~~~~~~~ >> arch/x86/include/asm/preempt.h:55:29: error: invalid storage class for function 'set_preempt_need_resched' static __always_inline void set_preempt_need_resched(void) ^~~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/include/asm/preempt.h:60:29: error: invalid storage class for function 'clear_preempt_need_resched' static __always_inline void clear_preempt_need_resched(void) ^~~~~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/include/asm/preempt.h:65:29: error: invalid storage class for function 'test_preempt_need_resched' static __always_inline bool test_preempt_need_resched(void) ^~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from kernel//locking/mutex.c:21:0: include/linux/ww_mutex.h: In function 'ww_mutex_is_owned_by': >> include/linux/ww_mutex.h:380:0: error: unterminated argument list invoking macro "likely" #endif >> include/linux/ww_mutex.h:377:3: error: 'likely' undeclared (first use in this function) likely(READ_ONCE(lock->ctx) == NULL; ^~~~~~ include/linux/ww_mutex.h:377:3: note: each undeclared identifier is reported only once for each function it appears in In file included from include/linux/thread_info.h:13:0, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:81, from include/linux/rcupdate.h:40, from include/linux/rculist.h:11, from include/linux/sched/signal.h:5, from kernel//locking/mutex.c:22: >> include/linux/restart_block.h:11:1: error: expected ';' before 'struct' struct timespec; ^~~~~~ >> include/linux/restart_block.h:12:1: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] struct compat_timespec; ^~~~~~ In file included from include/linux/thread_info.h:38:0, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:81, from include/linux/rcupdate.h:40, from include/linux/rculist.h:11, from include/linux/sched/signal.h:5, from kernel//locking/mutex.c:22: >> arch/x86/include/asm/thread_info.h:170:19: error: invalid storage class for function 'arch_within_stack_frames' static inline int arch_within_stack_frames(const void * const stack, ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/preempt.h:7:0, from include/linux/preempt.h:81, from include/linux/rcupdate.h:40, from include/linux/rculist.h:11, from include/linux/sched/signal.h:5, from kernel//locking/mutex.c:22: >> include/linux/thread_info.h:57:20: error: invalid storage class for function 'set_ti_thread_flag' static inline void set_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:62:20: error: invalid storage class for function 'clear_ti_thread_flag' static inline void clear_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:67:19: error: invalid storage class for function 'test_and_set_ti_thread_flag' static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:72:19: error: invalid storage class for function 'test_and_clear_ti_thread_flag' static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:77:19: error: invalid storage class for function 'test_ti_thread_flag' static inline int test_ti_thread_flag(struct thread_info *ti, int flag) ^~~~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:115:20: error: invalid storage class for function 'check_object_size' static inline void check_object_size(const void *ptr, unsigned long n, ^~~~~~~~~~~~~~~~~ >> include/linux/thread_info.h:125:20: error: invalid storage class for function 'copy_overflow' static inline void copy_overflow(int size, unsigned long count) ^~~~~~~~~~~~~ >> include/linux/thread_info.h:131:1: error: invalid storage class for function 'check_copy_size' check_copy_size(const void *addr, size_t bytes, bool is_source) ^~~~~~~~~~~~~~~ In file included from include/asm-generic/percpu.h:7:0, from arch/x86/include/asm/percpu.h:543, from arch/x86/include/asm/current.h:6, from include/linux/mutex.h:14, from kernel//locking/mutex.c:20: >> arch/x86/include/asm/preempt.h:9:22: error: section attribute cannot be specified for local variables DECLARE_PER_CPU(int, __preempt_count); ^ include/linux/percpu-defs.h:101:44: note: in definition of macro 'DECLARE_PER_CPU_SECTION' extern __PCPU_ATTRS(sec) __typeof__(type) name ^~~~ >> arch/x86/include/asm/preempt.h:9:1: note: in expansion of macro 'DECLARE_PER_CPU' DECLARE_PER_CPU(int, __preempt_count); ^~~~~~~~~~~~~~~ In file included from include/linux/preempt.h:81:0, from include/linux/rcupdate.h:40, from include/linux/rculist.h:11, from include/linux/sched/signal.h:5, from kernel//locking/mutex.c:22: >> arch/x86/include/asm/preempt.h:21:28: error: invalid storage class for function 'preempt_count' static __always_inline int preempt_count(void) ^~~~~~~~~~~~~ >> arch/x86/include/asm/preempt.h:26:29: error: invalid storage class for function 'preempt_count_set' static __always_inline void preempt_count_set(int pc) ^~~~~~~~~~~~~~~~~ >> arch/x86/include/asm/preempt.h:55:29: error: invalid storage class for function 'set_preempt_need_resched' static __always_inline void set_preempt_need_resched(void) ^~~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/include/asm/preempt.h:60:29: error: invalid storage class for function 'clear_preempt_need_resched' static __always_inline void clear_preempt_need_resched(void) ^~~~~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/include/asm/preempt.h:65:29: error: invalid storage class for function 'test_preempt_need_resched' static __always_inline bool test_preempt_need_resched(void) ^~~~~~~~~~~~~~~~~~~~~~~~~ vim +/likely +380 include/linux/ww_mutex.h 1b375dc3 Maarten Lankhorst 2013-07-05 360 6cb2b111 Christian König 2018-02-20 361 /** 6cb2b111 Christian König 2018-02-20 362 * ww_mutex_is_owned_by - is the w/w mutex locked by this task in that context 6cb2b111 Christian König 2018-02-20 363 * @lock: the mutex to be queried 6cb2b111 Christian König 2018-02-20 364 * @ctx: the w/w acquire context to test 6cb2b111 Christian König 2018-02-20 365 * 6cb2b111 Christian König 2018-02-20 366 * If @ctx is not NULL test if the mutex is owned by this context. 6cb2b111 Christian König 2018-02-20 367 * If @ctx is NULL test if the mutex is owned by the current thread and not 6cb2b111 Christian König 2018-02-20 368 * locked in any context. 6cb2b111 Christian König 2018-02-20 369 */ 6cb2b111 Christian König 2018-02-20 370 static inline bool ww_mutex_is_owned_by(struct ww_mutex *lock, 6cb2b111 Christian König 2018-02-20 371 struct ww_acquire_ctx *ctx) 6cb2b111 Christian König 2018-02-20 372 { 6cb2b111 Christian König 2018-02-20 373 if (ctx) 6cb2b111 Christian König 2018-02-20 374 return likely(READ_ONCE(lock->ctx) == ctx); 6cb2b111 Christian König 2018-02-20 375 6cb2b111 Christian König 2018-02-20 376 return likely(__mutex_owner(&lock->base) == current) && 6cb2b111 Christian König 2018-02-20 @377 likely(READ_ONCE(lock->ctx) == NULL; 6cb2b111 Christian König 2018-02-20 378 } 6cb2b111 Christian König 2018-02-20 379 1b375dc3 Maarten Lankhorst 2013-07-05 @380 #endif :::::: The code at line 380 was first introduced by commit :::::: 1b375dc30710180c4b88cc59caba6e3481ec5c8b mutex: Move ww_mutex definitions to ww_mutex.h :::::: TO: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxx> :::::: CC: Ingo Molnar <mingo@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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