libperf: Add 'flush' to 'struct perf_mmap'

Move 'flush' from tools/perf's mmap to libperf's perf_mmap struct.

Signed-off-by: Jiri Olsa <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Michael Petlan <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Link: http://lore.kernel.org/lkml/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/builtin-record.c

···
 		if (map->core.base) {
 			record__adjust_affinity(rec, map);
 			if (synch) {
-				flush = map->flush;
-				map->flush = 1;
+				flush = map->core.flush;
+				map->core.flush = 1;
 			}
 			if (!record__aio_enabled(rec)) {
 				if (perf_mmap__push(map, rec, record__pushfn) < 0) {
 					if (synch)
-						map->flush = flush;
+						map->core.flush = flush;
 					rc = -1;
 					goto out;
 				}
···
 				if (record__aio_push(rec, map, &off) < 0) {
 					record__aio_set_pos(trace_fd, off);
 					if (synch)
-						map->flush = flush;
+						map->core.flush = flush;
 					rc = -1;
 					goto out;
 				}
 			}
 			if (synch)
-				map->flush = flush;
+				map->core.flush = flush;
 		}
 
 		if (map->auxtrace_mmap.base && !rec->opts.auxtrace_snapshot_mode &&

tools/perf/lib/include/internal/mmap.h

···
 	u64		 start;
 	u64		 end;
 	bool		 overwrite;
+	u64		 flush;
 	char		 event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
 };
 

tools/perf/util/mmap.c

···
 
 	perf_mmap__setup_affinity_mask(map, mp);
 
-	map->flush = mp->flush;
+	map->core.flush = mp->flush;
 
 	map->comp_level = mp->comp_level;
 
···
 	md->core.start = md->core.overwrite ? head : old;
 	md->core.end = md->core.overwrite ? old : head;
 
-	if ((md->core.end - md->core.start) < md->flush)
+	if ((md->core.end - md->core.start) < md->core.flush)
 		return -EAGAIN;
 
 	size = md->core.end - md->core.start;

tools/perf/util/mmap.h

···
 	} aio;
 #endif
 	cpu_set_t	affinity_mask;
-	u64		flush;
 	void		*data;
 	int		comp_level;
 };