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-rw-r--r--include/linux/rcupdate.h50
1 files changed, 0 insertions, 50 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 87bb0eee665b..b97842ff71d2 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -628,21 +628,6 @@ static inline void rcu_preempt_sleep_check(void)
628 ((typeof(*p) __force __kernel *)(p)); \ 628 ((typeof(*p) __force __kernel *)(p)); \
629}) 629})
630 630
631#define __rcu_access_index(p, space) \
632({ \
633 typeof(p) _________p1 = READ_ONCE(p); \
634 rcu_dereference_sparse(p, space); \
635 (_________p1); \
636})
637#define __rcu_dereference_index_check(p, c) \
638({ \
639 /* Dependency order vs. p above. */ \
640 typeof(p) _________p1 = lockless_dereference(p); \
641 rcu_lockdep_assert(c, \
642 "suspicious rcu_dereference_index_check() usage"); \
643 (_________p1); \
644})
645
646/** 631/**
647 * RCU_INITIALIZER() - statically initialize an RCU-protected global variable 632 * RCU_INITIALIZER() - statically initialize an RCU-protected global variable
648 * @v: The value to statically initialize with. 633 * @v: The value to statically initialize with.
@@ -787,41 +772,6 @@ static inline void rcu_preempt_sleep_check(void)
787#define rcu_dereference_raw_notrace(p) __rcu_dereference_check((p), 1, __rcu) 772#define rcu_dereference_raw_notrace(p) __rcu_dereference_check((p), 1, __rcu)
788 773
789/** 774/**
790 * rcu_access_index() - fetch RCU index with no dereferencing
791 * @p: The index to read
792 *
793 * Return the value of the specified RCU-protected index, but omit the
794 * smp_read_barrier_depends() and keep the READ_ONCE(). This is useful
795 * when the value of this index is accessed, but the index is not
796 * dereferenced, for example, when testing an RCU-protected index against
797 * -1. Although rcu_access_index() may also be used in cases where
798 * update-side locks prevent the value of the index from changing, you
799 * should instead use rcu_dereference_index_protected() for this use case.
800 */
801#define rcu_access_index(p) __rcu_access_index((p), __rcu)
802
803/**
804 * rcu_dereference_index_check() - rcu_dereference for indices with debug checking
805 * @p: The pointer to read, prior to dereferencing
806 * @c: The conditions under which the dereference will take place
807 *
808 * Similar to rcu_dereference_check(), but omits the sparse checking.
809 * This allows rcu_dereference_index_check() to be used on integers,
810 * which can then be used as array indices. Attempting to use
811 * rcu_dereference_check() on an integer will give compiler warnings
812 * because the sparse address-space mechanism relies on dereferencing
813 * the RCU-protected pointer. Dereferencing integers is not something
814 * that even gcc will put up with.
815 *
816 * Note that this function does not implicitly check for RCU read-side
817 * critical sections. If this function gains lots of uses, it might
818 * make sense to provide versions for each flavor of RCU, but it does
819 * not make sense as of early 2010.
820 */
821#define rcu_dereference_index_check(p, c) \
822 __rcu_dereference_index_check((p), (c))
823
824/**
825 * rcu_dereference_protected() - fetch RCU pointer when updates prevented 775 * rcu_dereference_protected() - fetch RCU pointer when updates prevented
826 * @p: The pointer to read, prior to dereferencing 776 * @p: The pointer to read, prior to dereferencing
827 * @c: The conditions under which the dereference will take place 777 * @c: The conditions under which the dereference will take place