include/linux/srcu.h

131  * If CONFIG_DEBUG_LOCK_ALLOC is selected, returns nonzero iff in an SRCU
133  * this assumes we are in an SRCU read-side critical section unless it can
141  * is in the idle loop from an RCU point of view or offline.
153  * Similar to other lockdep annotations, except there is an additional
154  * srcu_lock_sync(), which is basically an empty *write*-side critical section,
194  *	really are in an SRCU read-side critical section.
197  * If PROVE_RCU is enabled, invoking this outside of an RCU read-side
198  * critical section will result in an RCU-lockdep splat, unless @c evaluates
210  *	really are in an SRCU read-side critical section.
213  * is enabled, invoking this outside of an RCU read-side critical
214  * section will result in an RCU-lockdep splat.
222  *	really are in an SRCU read-side critical section.
227  * srcu_read_lock - register a new reader for an SRCU-protected structure.
230  * Enter an SRCU read-side critical section.  Note that SRCU read-side
232  * call anything that waits on an SRCU grace period for the same
234  * one way to indirectly wait on an SRCU grace period is to acquire
242  * illegal to invoke srcu_read_unlock() in an irq handler if the matching
258  * srcu_read_lock_fast - register a new reader for an SRCU-protected structure.
261  * Enter an SRCU read-side critical section, but for a light-weight
264  * If srcu_read_lock_fast() is ever used on an srcu_struct structure,
285  * srcu_down_read_fast - register a new reader for an SRCU-protected structure.
303  * srcu_read_lock_lite - register a new reader for an SRCU-protected structure.
306  * Enter an SRCU read-side critical section, but for a light-weight
309  * If srcu_read_lock_lite() is ever used on an srcu_struct structure,
330  * srcu_read_lock_nmisafe - register a new reader for an SRCU-protected structure.
333  * Enter an SRCU read-side critical section, but in an NMI-safe manner.
336  * If srcu_read_lock_nmisafe() is ever used on an srcu_struct structure,
362  * srcu_down_read - register a new reader for an SRCU-protected structure.
367  * illegal to call anything that waits on an SRCU grace period for the
369  * one way to indirectly wait on an SRCU grace period is to acquire
376  * from some other task or from an irq handler.  However, neither
377  * srcu_down_read() nor srcu_up_read() may be invoked from an NMI handler.
391  * srcu_read_unlock - unregister a old reader from an SRCU-protected structure.
395  * Exit an SRCU read-side critical section.
407  * srcu_read_unlock_fast - unregister a old reader from an SRCU-protected structure.
422  * srcu_up_read_fast - unregister a old reader from an SRCU-protected structure.
426  * Exit an SRCU read-side critical section, but not necessarily from
438  * srcu_read_unlock_lite - unregister a old reader from an SRCU-protected structure.
454  * srcu_read_unlock_nmisafe - unregister a old reader from an SRCU-protected structure.
458  * Exit an SRCU read-side critical section, but in an NMI-safe manner.
478  * srcu_up_read - unregister a old reader from an SRCU-protected structure.
482  * Exit an SRCU read-side critical section, but not necessarily from