Commit 1f51b42b authored by Tejun Heo's avatar Tejun Heo
Browse files

Revert "docs: Raise minimum pahole version to 1.26 for KF_IMPLICIT_ARGS kfuncs" 

This reverts commit 9edd04c4.

The doc-only change is insufficient. The actual fix requires bumping the
minimum pahole version to 1.27 with proper Kconfig and Makefile.btf
changes, and should be routed through the BPF tree.

Link: https://lore.kernel.org/all/e0ca748d-3204-4160-b37d-0f76cbac8c6c@linux.dev


Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent ea702393

Documentation/process/changes.rst

+1 −6
Original line number Diff line number Diff line
@@ -38,7 +38,7 @@ bash 4.2 bash --version 
binutils               2.30             ld -v

flex                   2.5.35           flex --version

bison                  2.0              bison --version

pahole                 1.26             pahole --version

pahole                 1.22             pahole --version

util-linux             2.10o            mount --version

kmod                   13               depmod -V

e2fsprogs              1.41.4           e2fsck -V
@@ -145,11 +145,6 @@ 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 v1.22 or later.



Since Linux 7.0, kfuncs annotated with KF_IMPLICIT_ARGS require pahole v1.26

or later.  Without it, such kfuncs will have incorrect BTF prototypes in

vmlinux, causing BPF programs to fail to load with a "func_proto incompatible

with vmlinux" error.  Many sched_ext kfuncs are affected.



It is found in the 'dwarves' or 'pahole' distro packages or from

https://fedorapeople.org/~acme/dwarves/.