include/linux/srcu.h

121  * If CONFIG_DEBUG_LOCK_ALLOC is selected, returns nonzero iff in an SRCU
123  * this assumes we are in an SRCU read-side critical section unless it can
131  * is in the idle loop from an RCU point of view or offline.
143  * Similar to other lockdep annotations, except there is an additional
144  * srcu_lock_sync(), which is basically an empty *write*-side critical section,
195  *	really are in an SRCU read-side critical section.
198  * If PROVE_RCU is enabled, invoking this outside of an RCU read-side
199  * critical section will result in an RCU-lockdep splat, unless @c evaluates
211  *	really are in an SRCU read-side critical section.
214  * is enabled, invoking this outside of an RCU read-side critical
215  * section will result in an RCU-lockdep splat.
223  *	really are in an SRCU read-side critical section.
228  * srcu_read_lock - register a new reader for an SRCU-protected structure.
231  * Enter an SRCU read-side critical section.  Note that SRCU read-side
233  * call anything that waits on an SRCU grace period for the same
235  * one way to indirectly wait on an SRCU grace period is to acquire
241  * srcu_read_unlock() in an irq handler if the matching srcu_read_lock()
255  * srcu_read_lock_nmisafe - register a new reader for an SRCU-protected structure.
258  * Enter an SRCU read-side critical section, but in an NMI-safe manner.
283  * srcu_down_read - register a new reader for an SRCU-protected structure.
288  * illegal to call anything that waits on an SRCU grace period for the
290  * one way to indirectly wait on an SRCU grace period is to acquire
297  * from some other task or from an irq handler.  However, neither
298  * srcu_down_read() nor srcu_up_read() may be invoked from an NMI handler.
311  * srcu_read_unlock - unregister a old reader from an SRCU-protected structure.
315  * Exit an SRCU read-side critical section.
327  * srcu_read_unlock_nmisafe - unregister a old reader from an SRCU-protected structure.
331  * Exit an SRCU read-side critical section, but in an NMI-safe manner.
351  * srcu_up_read - unregister a old reader from an SRCU-protected structure.
355  * Exit an SRCU read-side critical section, but not necessarily from