Commit e3d6bf0a authored Mar 03, 2009 by Steven Rostedt

ring-buffer: replace sizeof of event header with offsetof

Impact: fix to possible alignment problems on some archs.

Some arch compilers include an NULL char array in the sizeof field.
Since the ring_buffer_event type includes one of these, it is better
to use the "offsetof" instead, to avoid strange bugs on these archs.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>

parent ef7a4a16

kernel/trace/ring_buffer.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -132,7 +132,7 @@ void ring_buffer_normalize_time_stamp(int cpu, u64 *ts)
		}
		EXPORT_SYMBOL_GPL(ring_buffer_normalize_time_stamp);

		#define RB_EVNT_HDR_SIZE (sizeof(struct ring_buffer_event))
		#define RB_EVNT_HDR_SIZE (offsetof(struct ring_buffer_event, array))
		#define RB_ALIGNMENT 4U
		#define RB_MAX_SMALL_DATA 28