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| author | Pekka Paalanen <pq@iki.fi> | 2008-05-12 21:21:02 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-23 22:02:13 +0200 |
| commit | 6c6c27969a4c6024e6c8838829546c02aaddca18 (patch) | |
| tree | 95158673881e53373ec4e7d92ff0c0e0f34be30f /kernel/trace/trace.h | |
| parent | 2bb6f8d6389cbfadd657e7dc069f6986abf35e4f (diff) | |
| download | op-kernel-dev-6c6c27969a4c6024e6c8838829546c02aaddca18.zip op-kernel-dev-6c6c27969a4c6024e6c8838829546c02aaddca18.tar.gz | |
ftrace: add readpos to struct trace_seq; add trace_seq_to_user()
Refactor code from tracing_read_pipe() and create trace_seq_to_user().
Moved trace_seq_reset() call before iter->trace->read() call so that
when all leftover data is returned, trace_seq is reset automatically.
Signed-off-by: Pekka Paalanen <pq@iki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index ee53d70..8845033 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -155,6 +155,7 @@ struct tracer { struct trace_seq { unsigned char buffer[PAGE_SIZE]; unsigned int len; + unsigned int readpos; }; /* @@ -301,6 +302,8 @@ extern int trace_selftest_startup_sched_switch(struct tracer *trace, extern void *head_page(struct trace_array_cpu *data); extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...); +extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, + size_t cnt); extern long ns2usecs(cycle_t nsec); extern unsigned long trace_flags; |
