[PATCH 1/1 v2] Documentation: Add minimum pahole version

From: Arnaldo Carvalho de Melo
Date: Fri Nov 19 2021 - 13:56:10 EST

A report was made in https://github.com/acmel/dwarves/issues/26 about
pahole not being listed in the process/changes.rst file as being needed
for building the kernel, address that.

Link: https://github.com/acmel/dwarves/issues/26
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Acked-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Acked-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: bpf@xxxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx
Link: http://lore.kernel.org/lkml/YZPQ6+u2wTHRfR+W@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Documentation/process/changes.rst | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst
index e35ab74a0f804b04..572465db0db19e8f 100644
--- a/Documentation/process/changes.rst
+++ b/Documentation/process/changes.rst
@@ -35,6 +35,7 @@ GNU make 3.81 make --version
binutils 2.23 ld -v
flex 2.5.35 flex --version
bison 2.0 bison --version
+pahole 1.16 pahole --version
util-linux 2.10o fdformat --version
kmod 13 depmod -V
e2fsprogs 1.41.4 e2fsck -V
@@ -108,6 +109,16 @@ Bison
Since Linux 4.16, the build system generates parsers
during build. This requires bison 2.0 or later.

+Since Linux 5.2, if CONFIG_DEBUG_INFO_BTF is selected, the build system
+generates BTF (BPF Type Format) from DWARF in vmlinux, a bit later from kernel
+modules as well. This requires pahole v1.16 or later.
+It is found in the 'dwarves' or 'pahole' distro packages or from