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-rw-r--r--libc/kernel/uapi/linux/perf_event.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libc/kernel/uapi/linux/perf_event.h b/libc/kernel/uapi/linux/perf_event.h
index dc1e32c1d..c106b5b4a 100644
--- a/libc/kernel/uapi/linux/perf_event.h
+++ b/libc/kernel/uapi/linux/perf_event.h
@@ -100,6 +100,7 @@ enum perf_event_sample_format {
PERF_SAMPLE_REGS_INTR = 1U << 18,
PERF_SAMPLE_PHYS_ADDR = 1U << 19,
PERF_SAMPLE_MAX = 1U << 20,
+ __PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63,
};
enum perf_branch_sample_type_shift {
PERF_SAMPLE_BRANCH_USER_SHIFT = 0,