From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file

---
 kernel/include/uapi/linux/bpf.h |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/kernel/include/uapi/linux/bpf.h b/kernel/include/uapi/linux/bpf.h
index 2a23402..36ddfb9 100644
--- a/kernel/include/uapi/linux/bpf.h
+++ b/kernel/include/uapi/linux/bpf.h
@@ -976,7 +976,9 @@
  * 		performed again, if the helper is used in combination with
  * 		direct packet access.
  * 	Return
- * 		0 on success, or a negative error in case of failure.
+ * 		0 on success, or a negative error in case of failure. Positive
+ * 		error indicates a potential drop or congestion in the target
+ * 		device. The particular positive error codes are not defined.
  *
  * u64 bpf_get_current_pid_tgid(void)
  * 	Return

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