From: Yoshihiro YUNOMAE <[email protected]> ring_buffer_oldest_event_ts() should return a value of u64 type, because ring_buffer_per_cpu->buffer_page->buffer_data_page->time_stamp is u64 type.
Link: http://lkml.kernel.org/r/[email protected] Cc: Frederic Weisbecker <[email protected]> Cc: Vaibhav Nagarnaik <[email protected]> Signed-off-by: Yoshihiro YUNOMAE <[email protected]> Signed-off-by: David Sharp <[email protected]> Signed-off-by: Steven Rostedt <[email protected]> --- include/linux/ring_buffer.h | 2 +- kernel/trace/ring_buffer.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h index 2007375..519777e 100644 --- a/include/linux/ring_buffer.h +++ b/include/linux/ring_buffer.h @@ -159,7 +159,7 @@ int ring_buffer_record_is_on(struct ring_buffer *buffer); void ring_buffer_record_disable_cpu(struct ring_buffer *buffer, int cpu); void ring_buffer_record_enable_cpu(struct ring_buffer *buffer, int cpu); -unsigned long ring_buffer_oldest_event_ts(struct ring_buffer *buffer, int cpu); +u64 ring_buffer_oldest_event_ts(struct ring_buffer *buffer, int cpu); unsigned long ring_buffer_bytes_cpu(struct ring_buffer *buffer, int cpu); unsigned long ring_buffer_entries(struct ring_buffer *buffer); unsigned long ring_buffer_overruns(struct ring_buffer *buffer); diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 23a384b..3c7834c 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -2932,12 +2932,12 @@ rb_num_of_entries(struct ring_buffer_per_cpu *cpu_buffer) * @buffer: The ring buffer * @cpu: The per CPU buffer to read from. */ -unsigned long ring_buffer_oldest_event_ts(struct ring_buffer *buffer, int cpu) +u64 ring_buffer_oldest_event_ts(struct ring_buffer *buffer, int cpu) { unsigned long flags; struct ring_buffer_per_cpu *cpu_buffer; struct buffer_page *bpage; - unsigned long ret; + u64 ret; if (!cpumask_test_cpu(cpu, buffer->cpumask)) return 0; -- 1.7.10.4
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