summaryrefslogtreecommitdiff
path: root/Documentation/bpf/btf.rst
diff options
context:
space:
mode:
authorGary Lin <glin@suse.com>2019-05-08 10:54:48 +0300
committerAlexei Starovoitov <ast@kernel.org>2019-05-10 01:59:59 +0300
commit3ef4641fbf870ee1ecd5f890a54881b7f0e20b90 (patch)
tree3b4103af0ee9c37188ac7f11573bfc17379fd729 /Documentation/bpf/btf.rst
parent69e168ebdcfcb87ce7252d4857d570f99996fa27 (diff)
downloadlinux-3ef4641fbf870ee1ecd5f890a54881b7f0e20b90.tar.xz
docs/btf: fix the missing section marks
The section titles of 3.4 and 3.5 are not marked correctly. Signed-off-by: Gary Lin <glin@suse.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'Documentation/bpf/btf.rst')
-rw-r--r--Documentation/bpf/btf.rst2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/bpf/btf.rst b/Documentation/bpf/btf.rst
index 29396e6943b0..8820360d00da 100644
--- a/Documentation/bpf/btf.rst
+++ b/Documentation/bpf/btf.rst
@@ -578,6 +578,7 @@ For line_info, the line number and column number are defined as below:
#define BPF_LINE_INFO_LINE_COL(line_col) ((line_col) & 0x3ff)
3.4 BPF_{PROG,MAP}_GET_NEXT_ID
+==============================
In kernel, every loaded program, map or btf has a unique id. The id won't
change during the lifetime of a program, map, or btf.
@@ -587,6 +588,7 @@ each command, to user space, for bpf program or maps, respectively, so an
inspection tool can inspect all programs and maps.
3.5 BPF_{PROG,MAP}_GET_FD_BY_ID
+===============================
An introspection tool cannot use id to get details about program or maps.
A file descriptor needs to be obtained first for reference-counting purpose.