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/linux/drivers/md/dm-vdo/indexer/
H A Dindex.c27 * chapter writer, and sparse cache barrier messages for the sparse cache.
29 * The chapter writer is responsible for committing chapters of records to storage. Since zones can
31 * its available space in a chapter, it informs the chapter writer that the chapter is complete,
34 * Once every zone has closed the chapter, the chapter writer will commit that chapter to storage.
66 /* The number of bytes allocated by the chapter writer */
182 struct chapter_writer *writer = index->chapter_writer; in finish_previous_chapter() local
184 mutex_lock(&writer->mutex); in finish_previous_chapter()
186 uds_wait_cond(&writer->cond, &writer->mutex); in finish_previous_chapter()
187 result = writer->result; in finish_previous_chapter()
188 mutex_unlock(&writer->mutex); in finish_previous_chapter()
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H A Dindex-layout.c517 struct buffered_writer *writer) in write_index_save_header() argument
541 result = uds_write_to_buffered_writer(writer, buffer, offset); in write_index_save_header()
546 return uds_flush_buffered_writer(writer); in write_index_save_header()
554 struct buffered_writer *writer; in write_index_save_layout() local
560 result = open_region_writer(layout, &isl->header, &writer); in write_index_save_layout()
566 result = write_index_save_header(isl, table, writer); in write_index_save_layout()
568 uds_free_buffered_writer(writer); in write_index_save_layout()
687 struct buffered_writer *writer) in write_layout_header() argument
716 result = uds_write_to_buffered_writer(writer, buffer, offset); in write_layout_header()
721 return uds_flush_buffered_writer(writer); in write_layout_header()
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H A Dio-factory.h13 * clients are the index layout and the volume. The buffered reader and buffered writer interfaces
59 int __must_check uds_write_to_buffered_writer(struct buffered_writer *writer,
62 int __must_check uds_flush_buffered_writer(struct buffered_writer *writer);
/linux/Documentation/trace/
H A Dring-buffer-design.rst28 - the task that writes into the ring buffer (same as writer)
30 writer
81 but a writer may interrupt another writer, but it must finish writing
82 before the previous writer may continue. This is very important to the
94 This is very much like a writer being preempted by an interrupt and
99 cannot preempt/interrupt a writer, but it may read/consume from the
100 buffer at the same time as a writer is writing, but the reader must be
102 and can be preempted by a writer.
104 A writer can preempt a reader, but a reader cannot preempt a writer.
106 as a writer.
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/linux/include/linux/
H A Dseqlock_types.h12 * This is the raw counting mechanism, without any writer protection.
21 * as the writer can invalidate a pointer that a reader is following.
27 * If it's desired to automatically handle the sequence counter writer
47 * reader preempting the writer, use a different technique: let the reader
48 * detect if a seqcount_LOCKNAME_t writer is in progress. If that is the
49 * case, acquire then release the associated LOCKNAME writer serialization
50 * lock. This will allow any possibly-preempted writer to make progress
51 * until the end of its writer serialization lock critical section.
77 * Sequence counters with an embedded spinlock for writer serialization
H A Dkfifo.h31 * and one writer is using the fifo and no kfifo_reset() will be called.
34 * For multiple writer and one reader there is only a need to lock the writer.
35 * And vice versa for only one writer and multiple reader there is only a need
414 * writer, you don't need extra locking to use these macro.
451 * writer, you don't need extra locking to use these macro.
490 * writer, you don't need extra locking to use these macro.
528 * writer, you don't need extra locking to use these macro.
596 * writer, you don't need extra locking to use these macro.
671 * writer, you don't need extra locking to use these macro.
699 * writer, you don't need extra locking to use these macro.
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/linux/drivers/iommu/arm/arm-smmu-v3/
H A Darm-smmu-v3-test.c11 struct arm_smmu_entry_writer writer; member
54 arm_smmu_test_writer_record_syncs(struct arm_smmu_entry_writer *writer) in arm_smmu_test_writer_record_syncs() argument
57 container_of(writer, struct arm_smmu_test_writer, writer); in arm_smmu_test_writer_record_syncs()
81 writer->ops->get_used(test_writer->entry, entry_used_bits); in arm_smmu_test_writer_record_syncs()
95 arm_smmu_v3_test_debug_print_used_bits(struct arm_smmu_entry_writer *writer, in arm_smmu_v3_test_debug_print_used_bits() argument
123 .writer = { in arm_smmu_v3_test_ste_expect_transition()
138 arm_smmu_v3_test_debug_print_used_bits(&test_writer.writer, cur->data); in arm_smmu_v3_test_ste_expect_transition()
142 arm_smmu_v3_test_debug_print_used_bits(&test_writer.writer, in arm_smmu_v3_test_ste_expect_transition()
145 arm_smmu_write_entry(&test_writer.writer, cur_copy.data, target->data); in arm_smmu_v3_test_ste_expect_transition()
407 .writer = { in arm_smmu_v3_test_cd_expect_transition()
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/linux/kernel/locking/
H A Drwsem.c7 * Writer lock-stealing by Alex Shi <alex.shi@intel.com>
42 * When the rwsem is reader-owned and a spinning writer has timed out,
45 * When a writer acquires a rwsem, it puts its task_struct pointer
60 * is previously owned by a writer and the following conditions are met:
61 * - rwsem is not currently writer owned
85 * Bit 0 - writer locked bit
94 * Bit 0 - writer locked bit
107 * atomic_long_cmpxchg() will be used to obtain writer lock.
114 * For all the above cases, wait_lock will be held. A writer must also
293 * by a writer.
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H A Dqrwlock.c29 * if the writer is just waiting (not holding the lock yet), in queued_read_lock_slowpath()
72 /* Put the writer into the wait queue */ in queued_write_lock_slowpath()
80 /* Set the waiting flag to notify readers that a writer is pending */ in queued_write_lock_slowpath()
/linux/tools/perf/util/
H A Ddata-convert-bt.c14 #include <babeltrace/ctf-writer/writer.h>
15 #include <babeltrace/ctf-writer/clock.h>
16 #include <babeltrace/ctf-writer/stream.h>
17 #include <babeltrace/ctf-writer/event.h>
18 #include <babeltrace/ctf-writer/event-types.h>
19 #include <babeltrace/ctf-writer/event-fields.h>
63 /* writer primitives */
64 struct bt_ctf_writer *writer; member
92 struct ctf_writer writer; member
705 stream = bt_ctf_writer_create_stream(cw->writer, cw->stream_class); in ctf_stream__create()
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/linux/kernel/trace/
H A Dtrace_recursion_record.c43 * If there's two writers and this writer comes in second, in ftrace_record_recursion()
45 * writer will try again. It is possible that index will now in ftrace_record_recursion()
46 * be greater than nr_records. This is because the writer in ftrace_record_recursion()
48 * This writer could keep trying again until the other writer in ftrace_record_recursion()
49 * updates nr_records. But if the other writer takes an in ftrace_record_recursion()
54 * writer will simply use the next position to update the in ftrace_record_recursion()
/linux/scripts/
H A Djobserver-exec30 # Starting with GNU Make 4.4, named pipes are used for reader and writer.
36 writer = os.open(path, os.O_WRONLY) variable
38 reader, writer = [int(x) for x in fds.split(",", 1)] variable
55 os.write(writer, jobs)
75 os.write(writer, jobs)
/linux/drivers/acpi/acpica/
H A Dutlock.c4 * Module Name: utlock - Reader/Writer lock interfaces
25 * DESCRIPTION: Reader/writer lock creation and deletion interfaces.
62 * DESCRIPTION: Reader interfaces for reader/writer locks. On acquisition,
122 * DESCRIPTION: Writer interfaces for reader/writer locks. Simply acquire or
123 * release the writer mutex associated with the lock. Acquisition
/linux/arch/arc/include/asm/
H A Dspinlock.h75 * Read-write spinlocks, allowing multiple readers but only one writer.
84 * zero means writer holds the lock exclusively, deny Reader. in arch_read_lock()
140 * deny writer. Otherwise if unlocked grant to writer in arch_write_lock()
290 * Read-write spinlocks, allowing multiple readers but only one writer.
307 * zero means writer holds the lock exclusively, deny Reader. in arch_read_trylock()
332 * deny writer. Otherwise if unlocked grant to writer in arch_write_trylock()
/linux/drivers/gpu/drm/amd/display/dc/
H A Ddm_pp_smu.h106 /* reader and writer WM's are sent together as part of one table*/
206 /* reader and writer WM's are sent together as part of one table*/
215 * writer fill clk = socclk
216 * writer drain clk = uclk
275 * reader and writer WM's are sent together as part of one table
293 * reader and writer WM's are sent together as part of one table
/linux/kernel/printk/
H A Dprintk_ringbuffer.h34 * Using prb_rec_init_wr(), a writer sets @text_buf_size before calling
36 * buffers reserved for that writer.
118 desc_reserved = 0x0, /* reserved, in use by writer */
119 desc_committed = 0x1, /* committed by writer, could get reopened */
121 desc_reusable = 0x3, /* free, not yet used by any writer */
171 * The first record reserved by a writer is assigned sequence number 0.
183 * writer (head + 1) to be the first descriptor in the array. (Only the first
217 * writer, which has the assigned sequence number 0.
261 /* this will be the first record reserved by a writer */ \
306 /* Writer Interface */
H A Dprintk_ringbuffer.c50 * A writer is modifying the record.
53 * The record and all its data are written. A writer can reopen the
59 * writer cannot reopen the descriptor.
88 * When a writer calls the commit function prb_commit(), record data is
89 * fully stored and is consistent within the ringbuffer. However, a writer can
91 * modify that record. When finished, the writer must again commit the record.
98 * 1) A writer can simultaneously commit and finalize its record by calling
116 * Each data block consists of an ID followed by the writer data. The ID is
129 * If the writer data of a data block would extend beyond the end of the
131 * position and the full data block (ID and writer dat
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/linux/fs/btrfs/
H A Dlocking.c121 * - reader/writer exclusion
122 * - writer/writer exclusion
304 * DREW stands for double-reader-writer-exclusion lock. It's used in situation
308 * writer both race to acquire their respective sides of the lock the writer
367 * the last active writer finishes its jobs. in btrfs_drew_read_lock()
/linux/arch/parisc/include/asm/
H A Dspinlock.h71 * Read-write spinlocks, allowing multiple readers but only one writer.
88 * zero means writer holds the lock exclusively, deny Reader. in arch_read_trylock()
113 * deny writer. Otherwise if unlocked grant to writer in arch_write_trylock()
/linux/Documentation/devicetree/bindings/mmc/
H A Dlitex,mmc.yaml31 - description: DMA Writer buffer
40 - const: writer
74 reg-names = "phy", "core", "reader", "writer", "irq";
/linux/tools/testing/radix-tree/
H A Dregression4.c60 pthread_t reader, writer; in regression4_test() local
68 pthread_create(&writer, NULL, writer_fn, NULL)) { in regression4_test()
73 if (pthread_join(reader, NULL) || pthread_join(writer, NULL)) { in regression4_test()
/linux/tools/testing/selftests/powerpc/dscr/
H A Ddscr_default_test.c41 pthread_t writer; in dscr_default_lockstep_test() local
50 FAIL_IF(sem_init(writer_sem, 0, 1)); /* writer starts first */ in dscr_default_lockstep_test()
52 FAIL_IF(pthread_create(&writer, NULL, dscr_default_lockstep_writer, (void *)rw_semaphores)); in dscr_default_lockstep_test()
65 FAIL_IF(pthread_join(writer, NULL)); in dscr_default_lockstep_test()
/linux/include/asm-generic/
H A Dqrwlock.h25 * Writer states & reader shift and bias.
27 #define _QW_WAITING 0x100 /* A writer is waiting */
28 #define _QW_LOCKED 0x0ff /* A writer holds the lock */
29 #define _QW_WMASK 0x1ff /* Writer mask */
/linux/tools/build/feature/
H A Dtest-libbabeltrace.c3 #include <babeltrace/ctf-writer/writer.h>
/linux/drivers/android/binder/
H A Dfreeze.rs88 writer: &mut BinderReturnWriter<'_>, in do_work()
100 writer.write_code(BR_CLEAR_FREEZE_NOTIFICATION_DONE)?; in do_work()
101 writer.write_payload(&self.cookie.0)?; in do_work()
120 writer.write_code(BR_CLEAR_FREEZE_NOTIFICATION_DONE)?; in do_work()
121 writer.write_payload(&self.cookie.0)?; in do_work()
136 writer.write_code(BR_FROZEN_BINDER)?; in do_work()
137 writer.write_payload(&state_info)?; in do_work()

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