include/linux/srcu.h

86  * If CONFIG_DEBUG_LOCK_ALLOC is selected, returns nonzero iff in an SRCU
88  * this assumes we are in an SRCU read-side critical section unless it can
96  * is in the idle loop from an RCU point of view or offline.
108  * Similar to other lockdep annotations, except there is an additional
109  * srcu_lock_sync(), which is basically an empty *write*-side critical section,
160  *	really are in an SRCU read-side critical section.
163  * If PROVE_RCU is enabled, invoking this outside of an RCU read-side
164  * critical section will result in an RCU-lockdep splat, unless @c evaluates
176  *	really are in an SRCU read-side critical section.
179  * is enabled, invoking this outside of an RCU read-side critical
180  * section will result in an RCU-lockdep splat.
188  *	really are in an SRCU read-side critical section.
193  * srcu_read_lock - register a new reader for an SRCU-protected structure.
196  * Enter an SRCU read-side critical section.  Note that SRCU read-side
198  * call anything that waits on an SRCU grace period for the same
200  * one way to indirectly wait on an SRCU grace period is to acquire
206  * srcu_read_unlock() in an irq handler if the matching srcu_read_lock()
220  * srcu_read_lock_nmisafe - register a new reader for an SRCU-protected structure.
223  * Enter an SRCU read-side critical section, but in an NMI-safe manner.
248  * srcu_down_read - register a new reader for an SRCU-protected structure.
253  * illegal to call anything that waits on an SRCU grace period for the
255  * one way to indirectly wait on an SRCU grace period is to acquire
262  * from some other task or from an irq handler.  However, neither
263  * srcu_down_read() nor srcu_up_read() may be invoked from an NMI handler.
276  * srcu_read_unlock - unregister a old reader from an SRCU-protected structure.
280  * Exit an SRCU read-side critical section.
292  * srcu_read_unlock_nmisafe - unregister a old reader from an SRCU-protected structure.
296  * Exit an SRCU read-side critical section, but in an NMI-safe manner.
316  * srcu_up_read - unregister a old reader from an SRCU-protected structure.
320  * Exit an SRCU read-side critical section, but not necessarily from