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tracepoints: Fix documentation of RCU lockdep checks 

The documentation on top of __DECLARE_TRACE() does not match its
implementation since the condition check has been added to the
RCU lockdep checks. Update the documentation to match its
implementation.

Link: http://lkml.kernel.org/r/1446504164-21563-1-git-send-email-mathieu.desnoyers@efficios.com

CC: Dave Hansen <dave@sr71.net>
Fixes: a05d59a567 "tracing: Add condition check to RCU lockdep checks"
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
steinar/wifi_calib_4_9_kernel
Mathieu Desnoyers 2015-11-02 17:42:42 -05:00 committed by Steven Rostedt
parent c6650b2e57
commit a15920bea0
1 changed files with 5 additions and 4 deletions
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9
include/linux/tracepoint.h
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@ -184,10 +184,11 @@ extern void syscall_unregfunc(void);
* structure. Force alignment to the same alignment as the section start. * structure. Force alignment to the same alignment as the section start.
* *
* When lockdep is enabled, we make sure to always do the RCU portions of * When lockdep is enabled, we make sure to always do the RCU portions of
* the tracepoint code, regardless of whether tracing is on or we match the * the tracepoint code, regardless of whether tracing is on. However,
* condition. This lets us find RCU issues triggered with tracepoints even * don't check if the condition is false, due to interaction with idle
* when this tracepoint is off. This code has no purpose other than poking * instrumentation. This lets us find RCU issues triggered with tracepoints
* RCU a bit. * even when this tracepoint is off. This code has no purpose other than
* poking RCU a bit.
*/ */
#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \ #define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
extern struct tracepoint __tracepoint_##name; \ extern struct tracepoint __tracepoint_##name; \