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Documentation/bpf: Update btf doc with updated vlen, kind sizes

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Sync doc with updated UAPI changes utilizing unused bts for
extended vlen, kind values.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/r/20260417143023.1551481-7-alan.maguire@oracle.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Alan Maguire
2026-04-17 15:30:23 +01:00
committed by Alexei Starovoitov
parent ad256554f1
commit 65350a0ecd
1 changed files with 2 additions and 4 deletions
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6
Documentation/bpf/btf.rst
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@@ -97,10 +97,8 @@ Each type contains the following common data::
struct btf_type {
__u32 name_off;
/* "info" bits arrangement
* bits 0-15: vlen (e.g. # of struct's members)
* bits 16-23: unused
* bits 24-28: kind (e.g. int, ptr, array...etc)
* bits 29-30: unused
* bits 0-23: vlen (e.g. # of struct's members)
* bits 24-30: kind (e.g. int, ptr, array...etc)
* bit 31: kind_flag, currently used by
* struct, union, enum, fwd, enum64,
* decl_tag and type_tag