[PATCH bpf-next v2] bpf: fix bpf_skb_pull_data documentation

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Fix documentation for bpf_skb_pull_data() helper for
when len == 0.

Fixes: fa15601ab31e ("bpf: add documentation for eBPF helpers (33-41)")
Signed-off-by: Joanne Koong <joannelkoong@xxxxxxxxx>
Acked-by: Quentin Monnet <quentin@xxxxxxxxxxxxx>
---
 include/uapi/linux/bpf.h       | 3 ++-
 tools/include/uapi/linux/bpf.h | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 379e68fb866f..ffcbf79a556b 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -2361,7 +2361,8 @@ union bpf_attr {
  * 		Pull in non-linear data in case the *skb* is non-linear and not
  * 		all of *len* are part of the linear section. Make *len* bytes
  * 		from *skb* readable and writable. If a zero value is passed for
- * 		*len*, then the whole length of the *skb* is pulled.
+ *		*len*, then all bytes in the linear part of *skb* will be made
+ *		readable and writable.
  *
  * 		This helper is only needed for reading and writing with direct
  * 		packet access.
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 379e68fb866f..ffcbf79a556b 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2361,7 +2361,8 @@ union bpf_attr {
  * 		Pull in non-linear data in case the *skb* is non-linear and not
  * 		all of *len* are part of the linear section. Make *len* bytes
  * 		from *skb* readable and writable. If a zero value is passed for
- * 		*len*, then the whole length of the *skb* is pulled.
+ *		*len*, then all bytes in the linear part of *skb* will be made
+ *		readable and writable.
  *
  * 		This helper is only needed for reading and writing with direct
  * 		packet access.
-- 
2.30.2




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