Re: [PATCH] locking/ww_mutex: add ww_mutex_is_owned_by function v4

From: kbuild test robot
Date: Tue Feb 20 2018 - 13:34:15 EST

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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>

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