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| 2 | #ifndef _LINUX_TRACE_H
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| 3 | #define _LINUX_TRACE_H
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| 4 |
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| 5 | #ifdef CONFIG_TRACING
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| 6 | |
| 7 | * The trace export - an export of Ftrace output. The trace_export
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| 8 | * can process traces and export them to a registered destination as
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| 9 | * an addition to the current only output of Ftrace - i.e. ring buffer.
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| 10 | *
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| 11 | * If you want traces to be sent to some other place rather than ring
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| 12 | * buffer only, just need to register a new trace_export and implement
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| 13 | * its own .write() function for writing traces to the storage.
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| 14 | *
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| 15 | * next - pointer to the next trace_export
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| 16 | * write - copy traces which have been delt with ->commit() to
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| 17 | * the destination
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| 18 |
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| 19 | struct trace_export {
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| 20 | struct trace_export __rcu *next;
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| 21 | void (*write)(struct trace_export *, const void *, unsigned int);
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| 22 | };
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| 23 |
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| 24 | int register_ftrace_export(struct trace_export *export);
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| 25 | int unregister_ftrace_export(struct trace_export *export);
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| 26 |
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| 27 | #endif
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| 28 |
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| 29 | #endif
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