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/linux-6.14.4/kernel/locking/
Drtmutex.c68 * lock->owner state tracking:
70 * lock->owner holds the task_struct pointer of the owner. Bit 0
73 * owner bit0
81 * possible when bit 0 of lock->owner is 0.
85 * we need to set the bit0 before looking at the lock, and the owner may be
90 * To prevent a cmpxchg of the owner releasing the lock, we need to
95 rt_mutex_owner_encode(struct rt_mutex_base *lock, struct task_struct *owner) in rt_mutex_owner_encode() argument
97 unsigned long val = (unsigned long)owner; in rt_mutex_owner_encode()
106 rt_mutex_set_owner(struct rt_mutex_base *lock, struct task_struct *owner) in rt_mutex_set_owner() argument
110 * for a new lock owner so WRITE_ONCE is insufficient. in rt_mutex_set_owner()
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Dspinlock_debug.c29 lock->owner = SPINLOCK_OWNER_INIT; in __raw_spin_lock_init()
48 lock->owner = SPINLOCK_OWNER_INIT; in __rwlock_init()
57 struct task_struct *owner = READ_ONCE(lock->owner); in spin_dump() local
59 if (owner == SPINLOCK_OWNER_INIT) in spin_dump()
60 owner = NULL; in spin_dump()
64 printk(KERN_EMERG " lock: %pS, .magic: %08x, .owner: %s/%d, " in spin_dump()
67 owner ? owner->comm : "<none>", in spin_dump()
68 owner ? task_pid_nr(owner) : -1, in spin_dump()
87 SPIN_BUG_ON(READ_ONCE(lock->owner) == current, lock, "recursion"); in debug_spin_lock_before()
95 WRITE_ONCE(lock->owner, current); in debug_spin_lock_after()
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Drwsem.c36 * The least significant 2 bits of the owner value has the following
45 * into the owner field. It is cleared after an unlock.
48 * pointer into the owner field with the RWSEM_READER_OWNED bit set.
49 * On unlock, the owner field will largely be left untouched. So
50 * for a free or reader-owned rwsem, the owner value may contain
70 …WARN_ONCE(c, "DEBUG_RWSEMS_WARN_ON(%s): count = 0x%lx, magic = 0x%lx, owner = 0x%lx, curr 0x%lx, l…
73 atomic_long_read(&(sem)->owner), (long)current, \
131 * All writes to owner are protected by WRITE_ONCE() to make sure that
133 * the owner value concurrently without lock. Read from owner, however,
143 atomic_long_set(&sem->owner, (long)current); in rwsem_set_owner()
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Dmutex.c48 atomic_long_set(&lock->owner, 0); in __mutex_init()
59 static inline struct task_struct *__owner_task(unsigned long owner) in __owner_task() argument
61 return (struct task_struct *)(owner & ~MUTEX_FLAGS); in __owner_task()
70 static inline unsigned long __owner_flags(unsigned long owner) in __owner_flags() argument
72 return owner & MUTEX_FLAGS; in __owner_flags()
80 unsigned long owner, curr = (unsigned long)current; in __mutex_trylock_common() local
82 owner = atomic_long_read(&lock->owner); in __mutex_trylock_common()
84 unsigned long flags = __owner_flags(owner); in __mutex_trylock_common()
85 unsigned long task = owner & ~MUTEX_FLAGS; in __mutex_trylock_common()
104 if (atomic_long_try_cmpxchg_acquire(&lock->owner, &owner, task | flags)) { in __mutex_trylock_common()
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/linux-6.14.4/drivers/media/mc/
Dmc-dev-allocator.c31 struct module *owner; member
63 struct module *owner) in __media_device_get() argument
73 /* get module reference for the media_device owner */ in __media_device_get()
74 if (owner != mdi->owner && !try_module_get(mdi->owner)) in __media_device_get()
76 "%s: module %s get owner reference error\n", in __media_device_get()
79 dev_dbg(dev, "%s: module %s got owner reference\n", in __media_device_get()
88 mdi->owner = owner; in __media_device_get()
92 dev_dbg(dev, "%s: Allocated media device for owner %s\n", in __media_device_get()
99 struct module *owner) in media_device_usb_allocate() argument
104 mdev = __media_device_get(&udev->dev, module_name, owner); in media_device_usb_allocate()
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/linux-6.14.4/arch/s390/lib/
Dspinlock.c76 int owner; in arch_load_niai4() local
80 " l %[owner],%[lock]\n" in arch_load_niai4()
81 : [owner] "=d" (owner) : [lock] "R" (*lock) : "memory"); in arch_load_niai4()
82 return owner; in arch_load_niai4()
140 int lockval, ix, node_id, tail_id, old, new, owner, count; in arch_spin_lock_queued() local
181 owner = arch_spin_yield_target(old, node); in arch_spin_lock_queued()
182 if (owner && arch_vcpu_is_preempted(owner - 1)) in arch_spin_lock_queued()
183 smp_yield_cpu(owner - 1); in arch_spin_lock_queued()
193 owner = arch_spin_yield_target(old, node); in arch_spin_lock_queued()
194 if (owner && arch_vcpu_is_preempted(owner - 1)) in arch_spin_lock_queued()
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/linux-6.14.4/rust/kernel/sync/
Dlocked_by.rs79 owner: *const U, field
97 /// It stores a raw pointer to the owner that is never dereferenced. It is only used to ensure
98 /// that the right owner is being used to access the protected data. If the owner is freed, the
99 /// data becomes inaccessible; if another instance of the owner is allocated *on the same
102 pub fn new<B: Backend>(owner: &Lock<U, B>, data: T) -> Self { in new()
108 owner: owner.data.get(), in new()
116 /// reference) that the owner is locked.
123 /// Panics if `owner` is different from the data protected by the lock used in
125 pub fn access<'a>(&'a self, owner: &'a U) -> &'a T in access()
131 "`U` cannot be a ZST because `owner` wouldn't be unique" in access()
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/linux-6.14.4/fs/btrfs/
Dlocking.h96 * @owner: The struct where the lockdep map is defined
104 #define btrfs_might_wait_for_event(owner, lock) \ argument
106 rwsem_acquire(&owner->lock##_map, 0, 0, _THIS_IP_); \
107 rwsem_release(&owner->lock##_map, _THIS_IP_); \
113 * @owner: The struct where the lockdep map is defined
121 #define btrfs_lockdep_acquire(owner, lock) \ argument
122 rwsem_acquire_read(&owner->lock##_map, 0, 0, _THIS_IP_)
128 #define btrfs_lockdep_release(owner, lock) \ argument
129 rwsem_release(&owner->lock##_map, _THIS_IP_)
135 #define btrfs_lockdep_inode_acquire(owner, lock) \ argument
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/linux-6.14.4/net/core/
Ddevmem.c34 struct dmabuf_genpool_chunk_owner *owner = chunk->owner; in net_devmem_dmabuf_free_chunk_owner() local
36 kvfree(owner->niovs); in net_devmem_dmabuf_free_chunk_owner()
37 kfree(owner); in net_devmem_dmabuf_free_chunk_owner()
42 struct dmabuf_genpool_chunk_owner *owner = net_iov_owner(niov); in net_devmem_get_dma_addr() local
44 return owner->base_dma_addr + in net_devmem_get_dma_addr()
73 struct dmabuf_genpool_chunk_owner *owner; in net_devmem_alloc_dmabuf() local
80 (void **)&owner); in net_devmem_alloc_dmabuf()
84 offset = dma_addr - owner->base_dma_addr; in net_devmem_alloc_dmabuf()
86 niov = &owner->niovs[index]; in net_devmem_alloc_dmabuf()
255 struct dmabuf_genpool_chunk_owner *owner; in net_devmem_bind_dmabuf() local
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/linux-6.14.4/Documentation/userspace-api/
Dntsync.rst31 identifier denoting its owner. A mutex is considered signaled when its
32 owner is zero (indicating that it is not owned). The recursion count is
36 A mutex also holds an internal flag denoting whether its previous owner
37 has died; such a mutex is said to be abandoned. Owner death is not
43 owner identifier is not interpreted by the ntsync driver at all. The
81 __u32 owner;
94 __u32 owner;
130 * - ``owner``
131 - Initial owner of the mutex.
133 If ``owner`` is nonzero and ``count`` is zero, or if ``owner`` is
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/linux-6.14.4/scripts/coccinelle/api/
Dplatform_no_drv_owner.cocci2 /// Remove .owner field if calls are used which set it automatically
31 - .owner = THIS_MODULE,
40 - .owner = THIS_MODULE,
62 - .owner = THIS_MODULE,
71 - .owner = THIS_MODULE,
84 * .owner@j0 = THIS_MODULE,
95 * .owner@j0 = THIS_MODULE,
106 * .owner@j0 = THIS_MODULE,
117 * .owner@j0 = THIS_MODULE,
127 msg = "No need to set .owner here. The core will do it."
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/linux-6.14.4/Documentation/locking/
Drt-mutex.rst19 A low priority owner of a rt-mutex inherits the priority of a higher
21 boosted owner blocks on a rt-mutex itself it propagates the priority
22 boosting to the owner of the other rt_mutex it gets blocked on. The
34 rtmutex, only the top priority waiter is enqueued into the owner's
37 got a signal), the priority of the owner task is readjusted. The
46 The state of the rt-mutex is tracked via the owner field of the rt-mutex
49 lock->owner holds the task_struct pointer of the owner. Bit 0 is used to
53 owner bit0 Notes
63 possible when bit 0 of lock->owner is 0.
67 we need to set the bit0 before looking at the lock, and the owner may
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Drt-mutex-design.rst108 pi_waiters rbtree of a mutex owner task (described below).
301 Mutex owner and flags
304 The mutex structure contains a pointer to the owner of the mutex. If the
305 mutex is not owned, this owner is set to NULL. Since all architectures
341 The use of rt_mutex_cmpxchg with the flags in the owner field help optimize
394 (de)boosting (the owner of a mutex that a process is blocking on), a flag to
404 that the state of the owner and lock can change when entered into this function.
425 fails). Only when the owner field of the mutex is NULL can the lock be
435 tree of the owner.
446 the "Has Waiters" flag of the mutex's owner field. By setting this flag
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/linux-6.14.4/kernel/futex/
Dpi.c27 pi_state->owner = NULL; in refill_pi_state_cache()
49 struct task_struct *old_owner = pi_state->owner; in pi_state_update_owner()
64 pi_state->owner = new_owner; in pi_state_update_owner()
87 * If pi_state->owner is NULL, the owner is most probably dying in put_pi_state()
90 if (pi_state->owner) { in put_pi_state()
104 * clear pi_state->owner. in put_pi_state()
107 pi_state->owner = NULL; in put_pi_state()
116 * Waiter | pi_state | pi->owner | uTID | uODIED | ?
138 * thread is found then it indicates that the owner TID has died.
148 * [6] Valid state after exit_pi_state_list() which sets the new owner in
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/linux-6.14.4/drivers/xen/
Dpci.c280 struct xen_device_domain_owner *owner; in find_device() local
282 list_for_each_entry(owner, &dev_domain_list, list) { in find_device()
283 if (owner->dev == dev) in find_device()
284 return owner; in find_device()
291 struct xen_device_domain_owner *owner; in xen_find_device_domain_owner() local
295 owner = find_device(dev); in xen_find_device_domain_owner()
296 if (owner) in xen_find_device_domain_owner()
297 domain = owner->domain; in xen_find_device_domain_owner()
305 struct xen_device_domain_owner *owner; in xen_register_device_domain_owner() local
307 owner = kzalloc(sizeof(struct xen_device_domain_owner), GFP_KERNEL); in xen_register_device_domain_owner()
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/linux-6.14.4/fs/xfs/libxfs/
Dxfs_rmap.c34 * Lookup the first record less than or equal to [bno, len, owner, offset]
41 uint64_t owner, in xfs_rmap_lookup_le() argument
52 cur->bc_rec.r.rm_owner = owner; in xfs_rmap_lookup_le()
72 * Lookup the record exactly matching [bno, len, owner, offset]
80 uint64_t owner, in xfs_rmap_lookup_eq() argument
87 cur->bc_rec.r.rm_owner = owner; in xfs_rmap_lookup_eq()
95 * by [bno, len, owner, offset].
125 uint64_t owner, in xfs_rmap_insert() argument
132 trace_xfs_rmap_insert(rcur, agbno, len, owner, offset, flags); in xfs_rmap_insert()
134 error = xfs_rmap_lookup_eq(rcur, agbno, len, owner, offset, flags, &i); in xfs_rmap_insert()
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Dxfs_rmap.h88 uint64_t *owner, in xfs_owner_info_unpack() argument
94 *owner = oinfo->oi_owner; in xfs_owner_info_unpack()
106 uint64_t owner, in xfs_owner_info_pack() argument
110 oinfo->oi_owner = owner; in xfs_owner_info_pack()
127 uint64_t owner, uint64_t offset, unsigned int flags,
130 xfs_extlen_t len, uint64_t owner, uint64_t offset,
133 xfs_extlen_t len, uint64_t owner, uint64_t offset,
190 xfs_extlen_t len, uint64_t owner);
192 xfs_extlen_t len, uint64_t owner);
202 uint64_t owner, uint64_t offset, unsigned int flags,
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/linux-6.14.4/tools/testing/selftests/ftrace/test.d/00basic/
Dtest_ownership.tc13 # find another owner and group that is not the original
31 owner=`stat -c "%u" $file`
34 echo "testing $file $owner=$original_owner and $group=$test_group"
35 if [ $owner -ne $original_owner ]; then
42 # Note, the remount does not update ownership so test going to and from owner
43 echo "test owner $file to $other_owner"
45 owner=`stat -c "%u" $file`
46 if [ $owner -ne $other_owner ]; then
51 owner=`stat -c "%u" $file`
52 if [ $owner -ne $original_owner ]; then
/linux-6.14.4/kernel/bpf/
Dbpf_local_storage.c27 static int mem_charge(struct bpf_local_storage_map *smap, void *owner, u32 size) in mem_charge() argument
34 return map->ops->map_local_storage_charge(smap, owner, size); in mem_charge()
37 static void mem_uncharge(struct bpf_local_storage_map *smap, void *owner, in mem_uncharge() argument
43 map->ops->map_local_storage_uncharge(smap, owner, size); in mem_uncharge()
47 owner_storage(struct bpf_local_storage_map *smap, void *owner) in owner_storage() argument
51 return map->ops->map_owner_storage_ptr(owner); in owner_storage()
75 bpf_selem_alloc(struct bpf_local_storage_map *smap, void *owner, in bpf_selem_alloc() argument
80 if (charge_mem && mem_charge(smap, owner, smap->elem_size)) in bpf_selem_alloc()
110 mem_uncharge(smap, owner, smap->elem_size); in bpf_selem_alloc()
246 /* reuse_now == true only happens when the storage owner in bpf_selem_free()
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/linux-6.14.4/tools/testing/selftests/drivers/ntsync/
Dntsync.c43 static int read_mutex_state(int mutex, __u32 *count, __u32 *owner) in read_mutex_state() argument
51 *owner = args.owner; in read_mutex_state()
55 #define check_mutex_state(mutex, count, owner) \ argument
61 EXPECT_EQ((owner), __owner); \
64 static int unlock_mutex(int mutex, __u32 owner, __u32 *count) in unlock_mutex() argument
69 args.owner = owner; in unlock_mutex()
98 const int *objs, __u32 owner, int alert, __u32 *index) in wait_objs() argument
109 args.owner = owner; in wait_objs()
117 static int wait_any(int fd, __u32 count, const int *objs, __u32 owner, __u32 *index) in wait_any() argument
119 return wait_objs(fd, NTSYNC_IOC_WAIT_ANY, count, objs, owner, 0, index); in wait_any()
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/linux-6.14.4/drivers/regulator/
Ddb8500-prcmu.c221 .owner = THIS_MODULE,
231 .owner = THIS_MODULE,
241 .owner = THIS_MODULE,
251 .owner = THIS_MODULE,
261 .owner = THIS_MODULE,
271 .owner = THIS_MODULE,
284 .owner = THIS_MODULE,
294 .owner = THIS_MODULE,
304 .owner = THIS_MODULE,
315 .owner = THIS_MODULE,
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Dlp8788-ldo.c193 .owner = THIS_MODULE,
206 .owner = THIS_MODULE,
219 .owner = THIS_MODULE,
232 .owner = THIS_MODULE,
245 .owner = THIS_MODULE,
258 .owner = THIS_MODULE,
271 .owner = THIS_MODULE,
284 .owner = THIS_MODULE,
297 .owner = THIS_MODULE,
310 .owner = THIS_MODULE,
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/linux-6.14.4/Documentation/mm/
Dpage_owner.rst2 page owner: Tracking about who allocated each page
8 page owner is for the tracking about who allocated each page.
22 page owner can also be used for various purposes. For example, accurate
24 each page. It is already implemented and activated if page owner is
32 page owner is disabled by default. So, if you'd like to use it, you need
34 with page owner and page owner is disabled in runtime due to not enabling
36 doesn't require memory to store owner information, so there is no runtime
37 memory overhead. And, page owner inserts just two unlikely branches into
39 like as the kernel without page owner. These two unlikely branches should
44 Although enabling page owner increases kernel size by several kilobytes,
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/linux-6.14.4/sound/soc/intel/avs/
Dpath.c75 if (path->template->owner == template) { in avs_path_find_path()
222 node_id.vindex = mod->owner->owner->dma_id; in avs_copier_create()
228 mod->owner->owner->dma_id; in avs_copier_create()
259 ret = avs_dsp_init_module(adev, mod->module_id, mod->owner->instance_id, in avs_copier_create()
272 path_tmpl = t->owner->owner->owner; in avs_get_module_control()
318 ret = avs_dsp_init_module(adev, mod->module_id, mod->owner->instance_id, t->core_id, in avs_peakvol_create()
341 return avs_dsp_init_module(adev, mod->module_id, mod->owner->instance_id, in avs_updown_mix_create()
358 return avs_dsp_init_module(adev, mod->module_id, mod->owner->instance_id, in avs_src_create()
378 return avs_dsp_init_module(adev, mod->module_id, mod->owner->instance_id, in avs_asrc_create()
397 return avs_dsp_init_module(adev, mod->module_id, mod->owner->instance_id, in avs_aec_create()
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/linux-6.14.4/drivers/gpu/drm/imagination/
Dpvr_stream_defs.c13 #define PVR_STREAM_DEF_SET(owner, member, _size, _array_size, _feature) \ argument
14 { .offset = offsetof(struct owner, member), \
19 #define PVR_STREAM_DEF(owner, member, member_size) \ argument
20 PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ ## member_size, 0, PVR_FEATURE_NONE)
22 #define PVR_STREAM_DEF_FEATURE(owner, member, member_size, feature) \ argument
23 PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ ## member_size, 0, feature)
25 #define PVR_STREAM_DEF_NOT_FEATURE(owner, member, member_size, feature) \ argument
26 PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ ## member_size, 0, \
29 #define PVR_STREAM_DEF_ARRAY(owner, member) \ argument
30 PVR_STREAM_DEF_SET(owner, member, PVR_STREAM_SIZE_ARRAY, \
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