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da485e0cb1
For now include/trace/boot.h doesn't need to include necessary headers for its functions and structures because the files that include it already do it. But boot.h could be needed as well for further uses on other files. So, this patch adds the necessary headers for future purposes... Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
#ifndef _LINUX_TRACE_BOOT_H
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#define _LINUX_TRACE_BOOT_H
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#include <linux/module.h>
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#include <linux/kallsyms.h>
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#include <linux/init.h>
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/*
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* Structure which defines the trace of an initcall
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* while it is called.
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* You don't have to fill the func field since it is
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* only used internally by the tracer.
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*/
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struct boot_trace_call {
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pid_t caller;
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char func[KSYM_SYMBOL_LEN];
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};
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/*
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* Structure which defines the trace of an initcall
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* while it returns.
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*/
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struct boot_trace_ret {
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char func[KSYM_SYMBOL_LEN];
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int result;
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unsigned long long duration; /* nsecs */
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};
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#ifdef CONFIG_BOOT_TRACER
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/* Append the traces on the ring-buffer */
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extern void trace_boot_call(struct boot_trace_call *bt, initcall_t fn);
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extern void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn);
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/* Tells the tracer that smp_pre_initcall is finished.
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* So we can start the tracing
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*/
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extern void start_boot_trace(void);
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/* Resume the tracing of other necessary events
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* such as sched switches
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*/
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extern void enable_boot_trace(void);
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/* Suspend this tracing. Actually, only sched_switches tracing have
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* to be suspended. Initcalls doesn't need it.)
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*/
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extern void disable_boot_trace(void);
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#else
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static inline
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void trace_boot_call(struct boot_trace_call *bt, initcall_t fn) { }
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static inline
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void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn) { }
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static inline void start_boot_trace(void) { }
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static inline void enable_boot_trace(void) { }
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static inline void disable_boot_trace(void) { }
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#endif /* CONFIG_BOOT_TRACER */
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#endif /* __LINUX_TRACE_BOOT_H */
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