[PATCH bpf-next v3 4/8] bpf, docs: Document BPF_ITER_NOSLEEP

[Michal Luczaj <mhal@rbox.co>]

Commit dfcd17659112 ("bpf: Reject sleepable programs for task_vma
iterator") introduced BPF_ITER_NOSLEEP, but did not update the docs.
Mention the flag in bpf_iterators.rst.

Signed-off-by: Michal Luczaj <mhal@rbox.co>
---
 Documentation/bpf/bpf_iterators.rst | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/Documentation/bpf/bpf_iterators.rst b/Documentation/bpf/bpf_iterators.rst
index 72435e32ffa1..c534215f05de 100644
--- a/Documentation/bpf/bpf_iterators.rst
+++ b/Documentation/bpf/bpf_iterators.rst
@@ -351,9 +351,15 @@ The following is the breakdown for each field in struct ``bpf_iter_reg``.
        the bpf iterator.
    * - feature
      - Specifies certain action requests in the kernel BPF iterator
-       infrastructure. Currently, only BPF_ITER_RESCHED is supported. This means
-       that the kernel function cond_resched() is called to avoid other kernel
-       subsystem (e.g., rcu) misbehaving.
+       infrastructure.
+
+       BPF_ITER_RESCHED
+           the kernel function cond_resched() is called to avoid other kernel
+           subsystem (e.g., rcu) misbehaving
+
+       BPF_ITER_NOSLEEP
+           ``seq_operations::show()`` cannot run sleepable programs
+
    * - seq_info
      - Specifies the set of seq operations for the BPF iterator and helpers to
        initialize/free the private data for the corresponding ``seq_file``.

-- 
2.56.0