bpf: Sync comments for bpf_get_stack

Commit ee2a098851bf missed updating the comments for helper bpf_get_stack
in tools/include/uapi/linux/bpf.h. Sync it.

Fixes: ee2a098851bf ("bpf: Adjust BPF stack helper functions to accommodate skip > 0")
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/ce54617746b7ed5e9ba3b844e55e74cb8a60e0b5.1648110794.git.geliang.tang@suse.com

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 7604e7d..d14b10b 100644 (file)
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -3009,8 +3009,8 @@ union bpf_attr {
  *
  *                     # sysctl kernel.perf_event_max_stack=<new value>
  *     Return
- *             A non-negative value equal to or less than *size* on success,
- *             or a negative error in case of failure.
+ *             The non-negative copied *buf* length equal to or less than
+ *             *size* on success, or a negative error in case of failure.
  *
  * long bpf_skb_load_bytes_relative(const void *skb, u32 offset, void *to, u32 len, u32 start_header)
  *     Description
@@ -4316,8 +4316,8 @@ union bpf_attr {
  *
  *                     # sysctl kernel.perf_event_max_stack=<new value>
  *     Return
- *             A non-negative value equal to or less than *size* on success,
- *             or a negative error in case of failure.
+ *             The non-negative copied *buf* length equal to or less than
+ *             *size* on success, or a negative error in case of failure.
  *
  * long bpf_load_hdr_opt(struct bpf_sock_ops *skops, void *searchby_res, u32 len, u64 flags)
  *     Description