include/linux/seqlock.h

33  * via seqcount_t under KCSAN: upon beginning a seq-reader critical section,
94  * that the write side critical section is properly serialized.
112  * that the write side critical section is properly serialized.
266  * __read_seqcount_begin() - begin a seqcount_t read section w/o barrier
272  * protected in this critical section.
291  * raw_read_seqcount_begin() - begin a seqcount_t read section w/o lockdep
305  * read_seqcount_begin() - begin a seqcount_t read critical section
320  * raw_read_seqcount opens a read critical section of the given
337  * raw_seqcount_begin() - begin a seqcount_t read critical section w/o
341  * raw_seqcount_begin opens a read critical section of the given
345  * section instead of stabilizing at the beginning of it.
347  * Use this only in special kernel hot paths where the read section is
363  * __read_seqcount_retry() - end a seqcount_t read section w/o barrier
370  * protected in this critical section.
375  * Return: true if a read section retry is required, else false
387  * read_seqcount_retry() - end a seqcount_t read critical section
391  * read_seqcount_retry closes the read critical section of given
392  * seqcount_t.  If the critical section was invalid, it must be ignored
395  * Return: true if a read section retry is required, else false
407  * raw_write_seqcount_begin() - start a seqcount_t write section w/o lockdep
428  * raw_write_seqcount_end() - end a seqcount_t write section w/o lockdep
449  * write_seqcount_begin_nested() - start a seqcount_t write section with
474  * write_seqcount_begin() - start a seqcount_t write side critical section
499  * write_seqcount_end() - end a seqcount_t write side critical section
530  * meant to propagate to the reader critical section. This is necessary because
532  * critical section that would ensure readers are aware of ongoing writes::
596  * typically NMIs, to safely interrupt the write side critical section.
640  * raw_read_seqcount_latch_retry() - end a seqcount_latch_t read section
644  * Return: true if a read section retry is required, else false
765  * read_seqbegin() - start a seqlock_t read side critical section
780  * read_seqretry() - end a seqlock_t read side section
784  * read_seqretry closes the read side critical section of given seqlock_t.
785  * If the critical section was invalid, it must be ignored (and typically
788  * Return: true if a read section retry is required, else false
794 	 * completing read critical section.  in read_seqretry()
808  * write_seqlock() - start a seqlock_t write side critical section
811  * write_seqlock opens a write side critical section for the given
816  * Context: if the seqlock_t read section, or other write side critical
827  * write_sequnlock() - end a seqlock_t write side critical section
831  * critical section of given seqlock_t.
840  * write_seqlock_bh() - start a softirqs-disabled seqlock_t write section
843  * _bh variant of write_seqlock(). Use only if the read side section, or
853  * write_sequnlock_bh() - end a softirqs-disabled seqlock_t write section
857  * softirqs-disabled, seqlock_t write side critical section opened with
867  * write_seqlock_irq() - start a non-interruptible seqlock_t write section
870  * _irq variant of write_seqlock(). Use only if the read side section, or
880  * write_sequnlock_irq() - end a non-interruptible seqlock_t write section
884  * seqlock_t write side section opened with write_seqlock_irq().
903  *                           section
909  * section, or other write sections, can be invoked from hardirq context.
916  *                                section
921  * seqlock_t write section previously opened with write_seqlock_irqsave().
931  * read_seqlock_excl() - begin a seqlock_t locking reader section
934  * read_seqlock_excl opens a seqlock_t locking reader critical section.  A
940  * Context: if the seqlock_t write section, *or other read sections*, can
944  * The opened read section must be closed with read_sequnlock_excl().
952  * read_sequnlock_excl() - end a seqlock_t locking reader critical section
961  * read_seqlock_excl_bh() - start a seqlock_t locking reader section with
966  * seqlock_t write side section, *or other read sections*, can be invoked
976  *			      reader section
986  *			     reader section
990  * write side section, *or other read sections*, can be invoked from a
1000  *                             locking reader section
1018  *				 locking reader section
1024  * write side section, *or other read sections*, can be invoked from a
1032  *				      locking reader section
1053  * lockless seqlock_t read section first.  If an odd counter is found, the
1061  * Context: if the seqlock_t write section, *or other read sections*, can
1069  * value must be checked with need_seqretry(). If the read section need to
1082  * need_seqretry() - validate seqlock_t "locking or lockless" read section
1086  * Return: true if a read section retry is required, false otherwise
1094  * done_seqretry() - end seqlock_t "locking or lockless" reader section
1098  * done_seqretry finishes the seqlock_t read side critical section started
1114  * the seqlock_t write section, *or other read sections*, can be invoked
1142  *				non-interruptible locking reader section
1148  * This is the _irqrestore variant of done_seqretry(). The read section