tjh.dev
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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
doc: Update RCU's lockdep.rst
This commit adds a couple of new functions to the documentation.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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Documentation/RCU/lockdep.rst
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Documentation/RCU/lockdep.rst
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rcu_read_lock_held() for normal RCU.
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rcu_read_lock_bh_held() for RCU-bh.
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rcu_read_lock_sched_held() for RCU-sched.
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rcu_read_lock_any_held() for any of normal RCU, RCU-bh, and RCU-sched.
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srcu_read_lock_held() for SRCU.
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rcu_read_lock_trace_held() for RCU Tasks Trace.
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These functions are conservative, and will therefore return 1 if they
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aren't certain (for example, if CONFIG_DEBUG_LOCK_ALLOC is not set).
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is invoked by both SRCU readers and updaters.
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rcu_dereference_raw(p):
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Don't check. (Use sparingly, if at all.)
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rcu_dereference_raw_check(p):
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Don't do lockdep at all. (Use sparingly, if at all.)
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rcu_dereference_protected(p, c):
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Use explicit check expression "c", and omit all barriers
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and compiler constraints. This is useful when the data