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Andrii Nakryiko a0b8200d06 kbuild: skip per-CPU BTF generation for pahole v1.18-v1.21 
Commit "mm/page_alloc: convert per-cpu list protection to local_lock" will
introduce a zero-sized per-CPU variable, which causes pahole to generate
invalid BTF.  Only pahole versions 1.18 through 1.21 are impacted, as
before 1.18 pahole doesn't know anything about per-CPU variables, and 1.22
contains the proper fix for the issue.

Luckily, pahole 1.18 got --skip_encoding_btf_vars option disabling BTF
generation for per-CPU variables in anticipation of some unanticipated
problems.  So use this escape hatch to disable per-CPU var BTF info on
those problematic pahole versions.  Users relying on availability of
per-CPU var BTFs would need to upgrade to pahole 1.22+, but everyone won't
notice any regressions.

Link: https://lkml.kernel.org/r/20210530002536.3193829-1-andrii@kernel.org
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Michal Suchanek <msuchanek@suse.de>
Cc: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2021-06-29 10:53:54 -07:00
..
atomic locking/atomics: Regenerate the atomics-check SHA1's 2020-11-07 13:20:41 +01:00
basic .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
clang-tools gen_compile_commands: prune some directories 2021-02-16 22:23:56 +09:00
coccinelle of: Remove of_dev_{get,put}() 2021-02-12 19:23:39 -06:00
dtc .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
dummy-tools kbuild: dummy-tools: adjust to stricter stackprotector check 2021-05-17 12:10:03 +09:00
gcc-plugins .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
gdb scripts/gdb: add lx_current support for arm64 2021-05-07 00:26:33 -07:00
genksyms .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
kconfig streamline_config.pl: add softtabstop=4 for vim users 2021-06-29 10:53:45 -07:00
ksymoops
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mod .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
package kbuild: buildtar: add riscv support 2021-03-29 23:13:30 -07:00
selinux scripts/selinux,selinux: update mdp to enable policy capabilities 2020-08-17 20:42:00 -04:00
tracing tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
.gitignore .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
Kbuild.include kbuild: split cc-option and friends to scripts/Makefile.compiler 2021-04-25 05:09:32 +09:00
Kconfig.include kbuild: check the minimum assembler version in Kconfig 2021-04-25 05:14:41 +09:00
Lindent
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Makefile Fix CVE-2020-26541 2021-04-26 08:38:10 -07:00
Makefile.asm-generic kbuild: prefix $(srctree)/ to some included Makefiles 2021-03-15 19:20:48 +09:00
Makefile.build kbuild: refactor fdtoverlay rule 2021-05-06 02:14:38 +09:00
Makefile.clean kbuild: prefix $(srctree)/ to some included Makefiles 2021-03-15 19:20:48 +09:00
Makefile.compiler kbuild: remove TMPO from try-run 2021-04-25 05:25:56 +09:00
Makefile.dtbinst kbuild: prefix $(srctree)/ to some included Makefiles 2021-03-15 19:20:48 +09:00
Makefile.extrawarn Makefile.extrawarn: remove -Wnested-externs warning 2020-12-08 23:30:05 +09:00
Makefile.gcc-plugins
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Makefile.headersinst kbuild: prefix $(srctree)/ to some included Makefiles 2021-03-15 19:20:48 +09:00
Makefile.host kbuild: sort hostprogs before passing it to ifneq 2020-08-10 01:32:59 +09:00
Makefile.kasan kasan: remove redundant config option 2021-04-16 16:10:36 -07:00
Makefile.kcov kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled 2020-08-10 01:32:59 +09:00
Makefile.kcsan Kbuild updates for v5.10 2020-10-22 13:13:57 -07:00
Makefile.lib kbuild: refactor modname-multi by using suffix-search 2021-05-06 02:14:38 +09:00
Makefile.modfinal kbuild: Quote OBJCOPY var to avoid a pahole call break the build 2021-05-27 11:32:56 -07:00
Makefile.modinst kbuild: add support for zstd compressed modules 2021-04-25 05:25:06 +09:00
Makefile.modpost kbuild: fix false-positive modpost warning when all symbols are trimmed 2021-04-25 05:17:53 +09:00
Makefile.package kbuild: deb-pkg: change the source package name to linux-upstream 2021-04-25 05:30:45 +09:00
Makefile.ubsan ubsan: remove overflow checks 2021-02-26 09:41:05 -08:00
Makefile.userprogs
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adjust_autoksyms.sh kbuild: do not include include/config/auto.conf from adjust_autoksyms.sh 2021-02-28 15:22:02 +09:00
as-version.sh kbuild: check the minimum assembler version in Kconfig 2021-04-25 05:14:41 +09:00
asn1_compiler.c
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bin2c.c
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bloat-o-meter scripts: switch explicitly to Python 3 2021-01-22 06:34:44 +09:00
bootgraph.pl
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bpf_doc.py scripts/bpf: Add syscall commands printer 2021-03-04 18:39:45 -08:00
cc-can-link.sh
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cc-version.sh kbuild: collect minimum tool versions into scripts/min-tool-version.sh 2021-04-25 05:14:26 +09:00
check-sysctl-docs
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check_extable.sh
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checkdeclares.pl scripts: a new script for checking duplicate struct declaration 2021-04-30 11:20:35 -07:00
checkincludes.pl
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checkkconfigsymbols.py kconfig: remove '---help---' support 2020-08-14 13:30:03 +09:00
checkpatch.pl checkpatch: improve ALLOC_ARRAY_ARGS test 2021-05-06 19:24:13 -07:00
checkstack.pl
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checksyscalls.sh
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checkversion.pl
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cleanfile
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cleanpatch
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coccicheck scripts: coccicheck: Correct usage of make coccicheck 2020-12-24 12:59:43 +01:00
config kconfig: config script: add a little user help 2021-01-04 10:38:11 +09:00
const_structs.checkpatch const_structs.checkpatch: add pinctrl_ops and pinmux_ops 2020-10-16 11:11:21 -07:00
decode_stacktrace.sh scripts/decode_stacktrace.sh: guess path to vmlinux by release name 2020-08-07 11:33:21 -07:00
decodecode scripts/decodecode: add the capability to supply the program counter 2020-10-13 18:38:26 -07:00
depmod.sh depmod: handle the case of /sbin/depmod without /sbin in PATH 2021-01-01 12:26:39 -08:00
dev-needs.sh scripts/dev-needs: Add script to list device dependencies 2020-09-04 18:19:37 +02:00
diffconfig scripts: switch explicitly to Python 3 2021-01-22 06:34:44 +09:00
documentation-file-ref-check
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export_report.pl
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extract-cert.c extract-cert: add static to local data 2020-08-18 20:16:46 +09:00
extract-ikconfig
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extract-module-sig.pl
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extract-sys-certs.pl
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extract-vmlinux
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extract_xc3028.pl
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faddr2line
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file-size.sh
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find-unused-docs.sh
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gcc-goto.sh
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gcc-ld
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gcc-x86_32-has-stack-protector.sh x86/stackprotector/32: Make the canary into a regular percpu variable 2021-03-08 13:19:05 +01:00
gcc-x86_64-has-stack-protector.sh
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gen_autoksyms.sh kbuild: fix UNUSED_KSYMS_WHITELIST for Clang LTO 2021-02-28 15:19:21 +09:00
gen_ksymdeps.sh
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generate_initcall_order.pl init: lto: ensure initcall ordering 2021-01-14 08:21:09 -08:00
get_abi.pl scripts: get_abi: ignore code blocks for cross-references 2021-03-31 13:53:16 -06:00
get_dvb_firmware
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get_feat.pl scripts: get_feat.pl: reduce table width for all features output 2020-12-04 14:34:27 -07:00
get_maintainer.pl get_maintainer: exclude MAINTAINERS file(s) from --git-fallback 2020-10-16 11:11:19 -07:00
gfp-translate
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headerdep.pl
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headers_check.pl
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headers_install.sh Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-08-07 13:29:39 -07:00
insert-sys-cert.c
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jobserver-exec scripts/jobserver-exec: Fix a typo ("envirnoment") 2021-05-17 12:10:03 +09:00
kallsyms.c kallsyms: fix nonconverging kallsyms table with lld 2021-02-05 17:53:28 +09:00
kernel-doc kernel-doc: Add support for __deprecated 2021-04-27 09:59:04 -06:00
ld-version.sh kbuild: collect minimum tool versions into scripts/min-tool-version.sh 2021-04-25 05:14:26 +09:00
leaking_addresses.pl
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link-vmlinux.sh kbuild: skip per-CPU BTF generation for pahole v1.18-v1.21 2021-06-29 10:53:54 -07:00
makelst
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markup_oops.pl
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min-tool-version.sh kbuild: collect minimum tool versions into scripts/min-tool-version.sh 2021-04-25 05:14:26 +09:00
mkcompile_h kbuild: Use uname for LINUX_COMPILE_HOST detection 2020-10-21 00:46:04 +09:00
mkmakefile
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mksysmap
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mkuboot.sh
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module.lds.S module: ensure __cfi_check alignment 2021-04-08 16:04:21 -07:00
modules-check.sh kbuild: check module name conflict for external modules as well 2021-04-25 05:22:42 +09:00
nsdeps kbuild: replace LANG=C with LC_ALL=C 2021-05-02 00:43:35 +09:00
objdiff
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parse-maintainers.pl
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patch-kernel
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profile2linkerlist.pl
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prune-kernel
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recordmcount.c ftrace: Have recordmcount use w8 to read relp->r_info in arm64_is_fake_mcount 2021-03-02 17:27:18 -05:00
recordmcount.h recordmcount: Correct st_shndx handling 2021-06-18 09:09:17 -04:00
recordmcount.pl Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
remove-stale-files kbuild: add a script to remove stale generated files 2021-05-02 00:43:35 +09:00
setlocalversion kbuild: replace LANG=C with LC_ALL=C 2021-05-02 00:43:35 +09:00
show_delta tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
sign-file.c
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sorttable.c
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sorttable.h
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spdxcheck-test.sh
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spdxcheck.py scripts/spdxcheck.py: Fix a typo 2021-03-28 14:41:49 +02:00
spelling.txt scripts/spelling.txt: add more spellings to spelling.txt 2021-06-29 10:53:45 -07:00
sphinx-pre-install docs: sphinx-pre-install: don't barf on beta Sphinx releases 2021-04-15 16:01:50 -06:00
split-man.pl tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
stackdelta
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stackusage
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subarch.include
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syscallhdr.sh scripts: add generic syscallhdr.sh 2021-02-22 08:22:04 +09:00
syscalltbl.sh scripts: add generic syscalltbl.sh 2021-02-22 08:22:03 +09:00
tags.sh kbuild: replace LANG=C with LC_ALL=C 2021-05-02 00:43:35 +09:00
tools-support-relr.sh
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unifdef.c
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ver_linux Removed the oprofiled version option 2021-05-03 17:23:06 -06:00
xen-hypercalls.sh
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xz_wrap.sh
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