[PATCH v1 1/2] perf/core: Include attr.defer_output in is_sb_event()

[Ian Rogers]

Events configured with attr.defer_output = 1 receive deferred callchain
sideband records (PERF_RECORD_CALLCHAIN_DEFERRED) via perf_iterate_sb().
Include attr->defer_output in is_sb_event() so that such events are
attached to the sideband event list even when no other sideband flags
(such as mmap or comm) are enabled on the event.

Fixes: c69993ecdd4d ("perf: Support deferred user unwind")
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 kernel/events/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index c4217c996f5a..b43883a42566 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -5347,7 +5347,7 @@ static bool is_sb_event(struct perf_event *event)
 	    attr->comm || attr->comm_exec ||
 	    attr->task || attr->ksymbol ||
 	    attr->context_switch || attr->text_poke ||
-	    attr->bpf_event)
+	    attr->bpf_event || attr->defer_output)
 		return true;
 
 	return false;
-- 
2.56.0.307.g5fe7bd680c-goog