[PATCH stable 5.10 0/5] kbuild: Fix compilation for latest pahole release

[PATCH stable 5.10 0/5] kbuild: Fix compilation for latest pahole release

[Jiri Olsa]

hi,
new version of pahole (1.24) is causing compilation fail for 5.10
stable kernel, discussed in here [1][2]. Sending fix for that plus
dependency patches.

thanks,
jirka


[1] https://lore.kernel.org/bpf/20220825163538.vajnsv3xcpbhl47v@altlinux.org/
[2] https://lore.kernel.org/bpf/YwQRKkmWqsf%2FDu6A@kernel.org/
---
Andrii Nakryiko (1):
      kbuild: skip per-CPU BTF generation for pahole v1.18-v1.21

Ilya Leoshkevich (1):
      bpf: Generate BTF_KIND_FLOAT when linking vmlinux

Javier Martinez Canillas (1):
      kbuild: Quote OBJCOPY var to avoid a pahole call break the build

Jiri Olsa (1):
      kbuild: Unify options for BTF generation for vmlinux and modules

Martin Rodriguez Reboredo (1):
      kbuild: Add skip_encoding_btf_enum64 option to pahole

 Makefile                |  3 +++
 scripts/link-vmlinux.sh |  2 +-
 scripts/pahole-flags.sh | 21 +++++++++++++++++++++
 3 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100755 scripts/pahole-flags.sh

[PATCH stable 5.10 1/5] bpf: Generate BTF_KIND_FLOAT when linking vmlinux

[Jiri Olsa]

From: Ilya Leoshkevich <iii@linux.ibm.com>

commit db16c1fe92d7ba7d39061faef897842baee2c887  upstream.

[backported for dependency only extra_paholeopt variable setup and
usage, we don't want floats generated in 5.10]

pahole v1.21 supports the --btf_gen_floats flag, which makes it
generate the information about the floating-point types [1].

Adjust link-vmlinux.sh to pass this flag to pahole in case it's
supported, which is determined using a simple version check.

[1] https://lore.kernel.org/dwarves/YHRiXNX1JUF2Az0A@kernel.org/

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210413190043.21918-1-iii@linux.ibm.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 scripts/link-vmlinux.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index d0b44bee9286..cdfccbfed452 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -146,6 +146,7 @@ vmlinux_link()
 gen_btf()
 {
 	local pahole_ver
+	local extra_paholeopt=
 
 	if ! [ -x "$(command -v ${PAHOLE})" ]; then
 		echo >&2 "BTF: ${1}: pahole (${PAHOLE}) is not available"
@@ -161,7 +162,7 @@ gen_btf()
 	vmlinux_link ${1}
 
 	info "BTF" ${2}
-	LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1}
+	LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${extra_paholeopt} ${1}
 
 	# Create ${2} which contains just .BTF section but no symbols. Add
 	# SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all
-- 
2.37.3

[PATCH stable 5.10 2/5] kbuild: Quote OBJCOPY var to avoid a pahole call break the build

[Jiri Olsa]

From: Javier Martinez Canillas <javierm@redhat.com>

commit ff2e6efda0d5c51b33e2bcc0b0b981ac0a0ef214 upstream.

[backported for dependency, skipped Makefile.modfinal change,
because module BTF is not supported in 5.10]

The ccache tool can be used to speed up cross-compilation, by calling the
compiler and binutils through ccache. For example, following should work:

    $ export ARCH=arm64 CROSS_COMPILE="ccache aarch64-linux-gnu-"

    $ make M=drivers/gpu/drm/rockchip/

but pahole fails to extract the BTF info from DWARF, breaking the build:

      CC [M]  drivers/gpu/drm/rockchip//rockchipdrm.mod.o
      LD [M]  drivers/gpu/drm/rockchip//rockchipdrm.ko
      BTF [M] drivers/gpu/drm/rockchip//rockchipdrm.ko
    aarch64-linux-gnu-objcopy: invalid option -- 'J'
    Usage: aarch64-linux-gnu-objcopy [option(s)] in-file [out-file]
     Copies a binary file, possibly transforming it in the process
    ...
    make[1]: *** [scripts/Makefile.modpost:156: __modpost] Error 2
    make: *** [Makefile:1866: modules] Error 2

this fails because OBJCOPY is set to "ccache aarch64-linux-gnu-copy" and
later pahole is executed with the following command line:

    LLVM_OBJCOPY=$(OBJCOPY) $(PAHOLE) -J --btf_base vmlinux $@

which gets expanded to:

    LLVM_OBJCOPY=ccache aarch64-linux-gnu-objcopy pahole -J ...

instead of:

    LLVM_OBJCOPY="ccache aarch64-linux-gnu-objcopy" pahole -J ...

Fixes: 5f9ae91f7c0d ("kbuild: Build kernel module BTFs if BTF is enabled and pahole supports it")
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lore.kernel.org/bpf/20210526215228.3729875-1-javierm@redhat.com
---
 scripts/link-vmlinux.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index cdfccbfed452..72bf14df6903 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -162,7 +162,7 @@ gen_btf()
 	vmlinux_link ${1}
 
 	info "BTF" ${2}
-	LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${extra_paholeopt} ${1}
+	LLVM_OBJCOPY="${OBJCOPY}" ${PAHOLE} -J ${extra_paholeopt} ${1}
 
 	# Create ${2} which contains just .BTF section but no symbols. Add
 	# SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all
-- 
2.37.3

Re: [PATCH stable 5.10 2/5] kbuild: Quote OBJCOPY var to avoid a pahole call break the build

[Greg KH]

On Wed, Oct 19, 2022 at 10:56:01AM +0200, Jiri Olsa wrote:
> From: Javier Martinez Canillas <javierm@redhat.com>
> 
> commit ff2e6efda0d5c51b33e2bcc0b0b981ac0a0ef214 upstream.

I only see patches 2, 3, and 4 of this series, same with
lore.kernel.org:
	https://lore.kernel.org/all/20221019085604.1017583-3-jolsa@kernel.org/

Are the remaining ones somewhere else?

thanks,

greg k-h

Re: [PATCH stable 5.10 2/5] kbuild: Quote OBJCOPY var to avoid a pahole call break the build

[Jiri Olsa]

On Wed, Oct 19, 2022 at 12:28:46PM +0200, Greg KH wrote:
> On Wed, Oct 19, 2022 at 10:56:01AM +0200, Jiri Olsa wrote:
> > From: Javier Martinez Canillas <javierm@redhat.com>
> > 
> > commit ff2e6efda0d5c51b33e2bcc0b0b981ac0a0ef214 upstream.
> 
> I only see patches 2, 3, and 4 of this series, same with
> lore.kernel.org:
> 	https://lore.kernel.org/all/20221019085604.1017583-3-jolsa@kernel.org/
> 
> Are the remaining ones somewhere else?

hum, the 'git send-email' log says it was sent to stable@vger.kernel.org
(plus other emails) all with no problem.. maybe some mailing list hiccup?
I'd give it some time

jirka

> 
> thanks,
> 
> greg k-h

[PATCH stable 5.10 3/5] kbuild: skip per-CPU BTF generation for pahole v1.18-v1.21

[Jiri Olsa]

From: Andrii Nakryiko <andrii@kernel.org>

commit a0b8200d06ad6450c179407baa5f0f52f8cfcc97 upstream.

[small context changes due to missing floats support in 5.10]

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>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 scripts/link-vmlinux.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 72bf14df6903..bbb22be4c8f1 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -161,6 +161,11 @@ gen_btf()
 
 	vmlinux_link ${1}
 
+	if [ "${pahole_ver}" -ge "118" ] && [ "${pahole_ver}" -le "121" ]; then
+		# pahole 1.18 through 1.21 can't handle zero-sized per-CPU vars
+		extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_vars"
+	fi
+
 	info "BTF" ${2}
 	LLVM_OBJCOPY="${OBJCOPY}" ${PAHOLE} -J ${extra_paholeopt} ${1}
 
-- 
2.37.3

[PATCH stable 5.10 4/5] kbuild: Unify options for BTF generation for vmlinux and modules

[Jiri Olsa]

From: Jiri Olsa <jolsa@redhat.com>

commit 9741e07ece7c247dd65e1aa01e16b683f01c05a8 upstream.

[skipped --btf_gen_floats option in pahole-flags.sh, skipped
Makefile.modfinal change, because there's no BTF kmod support,
squashing in 'exit 0' change from merge commit fc02cb2b37fe]

Using new PAHOLE_FLAGS variable to pass extra arguments to
pahole for both vmlinux and modules BTF data generation.

Adding new scripts/pahole-flags.sh script that detect and
prints pahole options.

[ fixed issues found by kernel test robot ]

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211029125729.70002-1-jolsa@kernel.org
---
 Makefile                |  3 +++
 scripts/link-vmlinux.sh |  8 +-------
 scripts/pahole-flags.sh | 17 +++++++++++++++++
 3 files changed, 21 insertions(+), 7 deletions(-)
 create mode 100755 scripts/pahole-flags.sh

diff --git a/Makefile b/Makefile
index b824bdb0457c..fc8f1a1c0d98 100644
--- a/Makefile
+++ b/Makefile
@@ -465,6 +465,8 @@ LZ4		= lz4c
 XZ		= xz
 ZSTD		= zstd
 
+PAHOLE_FLAGS	= $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
+
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
 NOSTDINC_FLAGS :=
@@ -518,6 +520,7 @@ export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
+export PAHOLE_FLAGS
 
 # Files to ignore in find ... statements
 
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index bbb22be4c8f1..acd07a70a2f4 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -146,7 +146,6 @@ vmlinux_link()
 gen_btf()
 {
 	local pahole_ver
-	local extra_paholeopt=
 
 	if ! [ -x "$(command -v ${PAHOLE})" ]; then
 		echo >&2 "BTF: ${1}: pahole (${PAHOLE}) is not available"
@@ -161,13 +160,8 @@ gen_btf()
 
 	vmlinux_link ${1}
 
-	if [ "${pahole_ver}" -ge "118" ] && [ "${pahole_ver}" -le "121" ]; then
-		# pahole 1.18 through 1.21 can't handle zero-sized per-CPU vars
-		extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_vars"
-	fi
-
 	info "BTF" ${2}
-	LLVM_OBJCOPY="${OBJCOPY}" ${PAHOLE} -J ${extra_paholeopt} ${1}
+	LLVM_OBJCOPY="${OBJCOPY}" ${PAHOLE} -J ${PAHOLE_FLAGS} ${1}
 
 	# Create ${2} which contains just .BTF section but no symbols. Add
 	# SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all
diff --git a/scripts/pahole-flags.sh b/scripts/pahole-flags.sh
new file mode 100755
index 000000000000..27445cb72974
--- /dev/null
+++ b/scripts/pahole-flags.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+extra_paholeopt=
+
+if ! [ -x "$(command -v ${PAHOLE})" ]; then
+	exit 0
+fi
+
+pahole_ver=$(${PAHOLE} --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/')
+
+if [ "${pahole_ver}" -ge "118" ] && [ "${pahole_ver}" -le "121" ]; then
+	# pahole 1.18 through 1.21 can't handle zero-sized per-CPU vars
+	extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_vars"
+fi
+
+echo ${extra_paholeopt}
-- 
2.37.3

[PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole

[Jiri Olsa]

From: Martin Rodriguez Reboredo <yakoyoku@gmail.com>

New pahole (version 1.24) generates by default new BTF_KIND_ENUM64 BTF tag,
which is not supported by stable kernel.

As a result the kernel with CONFIG_DEBUG_INFO_BTF option will fail to
compile with following error:

  BTFIDS  vmlinux
FAILED: load BTF from vmlinux: Invalid argument

New pahole provides --skip_encoding_btf_enum64 option to skip BTF_KIND_ENUM64
generation and produce BTF supported by stable kernel.

Adding this option to scripts/pahole-flags.sh.

This change does not have equivalent commit in linus tree, because linus tree
has support for BTF_KIND_ENUM64 tag, so it does not need to be disabled.

Signed-off-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 scripts/pahole-flags.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/pahole-flags.sh b/scripts/pahole-flags.sh
index 27445cb72974..8c82173e42e5 100755
--- a/scripts/pahole-flags.sh
+++ b/scripts/pahole-flags.sh
@@ -14,4 +14,8 @@ if [ "${pahole_ver}" -ge "118" ] && [ "${pahole_ver}" -le "121" ]; then
 	extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_vars"
 fi
 
+if [ "${pahole_ver}" -ge "124" ]; then
+	extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_enum64"
+fi
+
 echo ${extra_paholeopt}
-- 
2.37.3

Re: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole

[kernel test robot]

Hi,

Thanks for your patch.

FYI: kernel test robot notices the stable kernel rule is not satisfied.

Rule: 'Cc: stable@vger.kernel.org' or 'commit <sha1> upstream.'
Subject: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole
Link: https://lore.kernel.org/stable/20221019085604.1017583-6-jolsa%40kernel.org

The check is based on https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

Re: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole

[Slade Watkins]

On Wed, Oct 19, 2022 at 9:14 PM kernel test robot <lkp@intel.com> wrote:
>
> Hi,
>
> Thanks for your patch.
>
> FYI: kernel test robot notices the stable kernel rule is not satisfied.
>
> Rule: 'Cc: stable@vger.kernel.org' or 'commit <sha1> upstream.'
> Subject: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole
> Link: https://lore.kernel.org/stable/20221019085604.1017583-6-jolsa%40kernel.org

Uh, this should be fine though, right? The stable list was the primary
recipient and all show up for me in my stable folder.

-srw

Re: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole

[Slade Watkins]

[-- Attachment #1: Type: text/plain, Size: 572 bytes --]

On Wed, Oct 19, 2022 at 9:14 PM kernel test robot <lkp@intel.com> wrote:
>
> Hi,
>
> Thanks for your patch.
>
> FYI: kernel test robot notices the stable kernel rule is not satisfied.
>
> Rule: 'Cc: stable(a)vger.kernel.org' or 'commit <sha1> upstream.'
> Subject: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole
> Link: https://lore.kernel.org/stable/20221019085604.1017583-6-jolsa%40kernel.org

Uh, this should be fine though, right? The stable list was the primary
recipient and all show up for me in my stable folder.

-srw

Re: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole

[Greg KH]

On Wed, Oct 19, 2022 at 09:35:23PM -0400, Slade Watkins wrote:
> On Wed, Oct 19, 2022 at 9:14 PM kernel test robot <lkp@intel.com> wrote:
> >
> > Hi,
> >
> > Thanks for your patch.
> >
> > FYI: kernel test robot notices the stable kernel rule is not satisfied.
> >
> > Rule: 'Cc: stable@vger.kernel.org' or 'commit <sha1> upstream.'
> > Subject: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole
> > Link: https://lore.kernel.org/stable/20221019085604.1017583-6-jolsa%40kernel.org
> 
> Uh, this should be fine though, right? The stable list was the primary
> recipient and all show up for me in my stable folder.

Yes, this is fine, this bot is not that smart at times.

Re: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole

[Greg KH]

[-- Attachment #1: Type: text/plain, Size: 715 bytes --]

On Wed, Oct 19, 2022 at 09:35:23PM -0400, Slade Watkins wrote:
> On Wed, Oct 19, 2022 at 9:14 PM kernel test robot <lkp@intel.com> wrote:
> >
> > Hi,
> >
> > Thanks for your patch.
> >
> > FYI: kernel test robot notices the stable kernel rule is not satisfied.
> >
> > Rule: 'Cc: stable(a)vger.kernel.org' or 'commit <sha1> upstream.'
> > Subject: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole
> > Link: https://lore.kernel.org/stable/20221019085604.1017583-6-jolsa%40kernel.org
> 
> Uh, this should be fine though, right? The stable list was the primary
> recipient and all show up for me in my stable folder.

Yes, this is fine, this bot is not that smart at times.

Re: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole

[Jiri Olsa]

On Thu, Oct 20, 2022 at 07:10:21AM +0200, Greg KH wrote:
> On Wed, Oct 19, 2022 at 09:35:23PM -0400, Slade Watkins wrote:
> > On Wed, Oct 19, 2022 at 9:14 PM kernel test robot <lkp@intel.com> wrote:
> > >
> > > Hi,
> > >
> > > Thanks for your patch.
> > >
> > > FYI: kernel test robot notices the stable kernel rule is not satisfied.

the patch 5/5 does not have equivalent commit in linus tree,
so I wonder the warning is because of that

jirka

> > >
> > > Rule: 'Cc: stable@vger.kernel.org' or 'commit <sha1> upstream.'
> > > Subject: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole
> > > Link: https://lore.kernel.org/stable/20221019085604.1017583-6-jolsa%40kernel.org
> > 
> > Uh, this should be fine though, right? The stable list was the primary
> > recipient and all show up for me in my stable folder.
> 
> Yes, this is fine, this bot is not that smart at times.

Re: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole

[Jiri Olsa]

[-- Attachment #1: Type: text/plain, Size: 926 bytes --]

On Thu, Oct 20, 2022 at 07:10:21AM +0200, Greg KH wrote:
> On Wed, Oct 19, 2022 at 09:35:23PM -0400, Slade Watkins wrote:
> > On Wed, Oct 19, 2022 at 9:14 PM kernel test robot <lkp@intel.com> wrote:
> > >
> > > Hi,
> > >
> > > Thanks for your patch.
> > >
> > > FYI: kernel test robot notices the stable kernel rule is not satisfied.

the patch 5/5 does not have equivalent commit in linus tree,
so I wonder the warning is because of that

jirka

> > >
> > > Rule: 'Cc: stable(a)vger.kernel.org' or 'commit <sha1> upstream.'
> > > Subject: [PATCH stable 5.10 5/5] kbuild: Add skip_encoding_btf_enum64 option to pahole
> > > Link: https://lore.kernel.org/stable/20221019085604.1017583-6-jolsa%40kernel.org
> > 
> > Uh, this should be fine though, right? The stable list was the primary
> > recipient and all show up for me in my stable folder.
> 
> Yes, this is fine, this bot is not that smart at times.

Re: [PATCH stable 5.10 0/5] kbuild: Fix compilation for latest pahole release

[Greg KH]

On Wed, Oct 19, 2022 at 10:55:59AM +0200, Jiri Olsa wrote:
> hi,
> new version of pahole (1.24) is causing compilation fail for 5.10
> stable kernel, discussed in here [1][2]. Sending fix for that plus
> dependency patches.
> 
> thanks,
> jirka
> 
> 
> [1] https://lore.kernel.org/bpf/20220825163538.vajnsv3xcpbhl47v@altlinux.org/
> [2] https://lore.kernel.org/bpf/YwQRKkmWqsf%2FDu6A@kernel.org/
> ---
> Andrii Nakryiko (1):
>       kbuild: skip per-CPU BTF generation for pahole v1.18-v1.21
> 
> Ilya Leoshkevich (1):
>       bpf: Generate BTF_KIND_FLOAT when linking vmlinux
> 
> Javier Martinez Canillas (1):
>       kbuild: Quote OBJCOPY var to avoid a pahole call break the build
> 
> Jiri Olsa (1):
>       kbuild: Unify options for BTF generation for vmlinux and modules
> 
> Martin Rodriguez Reboredo (1):
>       kbuild: Add skip_encoding_btf_enum64 option to pahole
> 
>  Makefile                |  3 +++
>  scripts/link-vmlinux.sh |  2 +-
>  scripts/pahole-flags.sh | 21 +++++++++++++++++++++
>  3 files changed, 25 insertions(+), 1 deletion(-)
>  create mode 100755 scripts/pahole-flags.sh

Ah, all showed up now.  I'll look at these tomorrow, thanks!

greg k-h

Re: [PATCH stable 5.10 0/5] kbuild: Fix compilation for latest pahole release

[Jiri Olsa]

On Wed, Oct 19, 2022 at 04:55:46PM +0200, Greg KH wrote:
> On Wed, Oct 19, 2022 at 10:55:59AM +0200, Jiri Olsa wrote:
> > hi,
> > new version of pahole (1.24) is causing compilation fail for 5.10
> > stable kernel, discussed in here [1][2]. Sending fix for that plus
> > dependency patches.
> > 
> > thanks,
> > jirka
> > 
> > 
> > [1] https://lore.kernel.org/bpf/20220825163538.vajnsv3xcpbhl47v@altlinux.org/
> > [2] https://lore.kernel.org/bpf/YwQRKkmWqsf%2FDu6A@kernel.org/
> > ---
> > Andrii Nakryiko (1):
> >       kbuild: skip per-CPU BTF generation for pahole v1.18-v1.21
> > 
> > Ilya Leoshkevich (1):
> >       bpf: Generate BTF_KIND_FLOAT when linking vmlinux
> > 
> > Javier Martinez Canillas (1):
> >       kbuild: Quote OBJCOPY var to avoid a pahole call break the build
> > 
> > Jiri Olsa (1):
> >       kbuild: Unify options for BTF generation for vmlinux and modules
> > 
> > Martin Rodriguez Reboredo (1):
> >       kbuild: Add skip_encoding_btf_enum64 option to pahole
> > 
> >  Makefile                |  3 +++
> >  scripts/link-vmlinux.sh |  2 +-
> >  scripts/pahole-flags.sh | 21 +++++++++++++++++++++
> >  3 files changed, 25 insertions(+), 1 deletion(-)
> >  create mode 100755 scripts/pahole-flags.sh
> 
> Ah, all showed up now.  I'll look at these tomorrow, thanks!

great, thanks

jirka

Re: [PATCH stable 5.10 0/5] kbuild: Fix compilation for latest pahole release

[Greg KH]

On Wed, Oct 19, 2022 at 10:55:59AM +0200, Jiri Olsa wrote:
> hi,
> new version of pahole (1.24) is causing compilation fail for 5.10
> stable kernel, discussed in here [1][2]. Sending fix for that plus
> dependency patches.
> 
> thanks,
> jirka
> 
> 
> [1] https://lore.kernel.org/bpf/20220825163538.vajnsv3xcpbhl47v@altlinux.org/
> [2] https://lore.kernel.org/bpf/YwQRKkmWqsf%2FDu6A@kernel.org/
> ---
> Andrii Nakryiko (1):
>       kbuild: skip per-CPU BTF generation for pahole v1.18-v1.21
> 
> Ilya Leoshkevich (1):
>       bpf: Generate BTF_KIND_FLOAT when linking vmlinux
> 
> Javier Martinez Canillas (1):
>       kbuild: Quote OBJCOPY var to avoid a pahole call break the build
> 
> Jiri Olsa (1):
>       kbuild: Unify options for BTF generation for vmlinux and modules
> 
> Martin Rodriguez Reboredo (1):
>       kbuild: Add skip_encoding_btf_enum64 option to pahole
> 
>  Makefile                |  3 +++
>  scripts/link-vmlinux.sh |  2 +-
>  scripts/pahole-flags.sh | 21 +++++++++++++++++++++
>  3 files changed, 25 insertions(+), 1 deletion(-)
>  create mode 100755 scripts/pahole-flags.sh

Now queued up, thanks.

greg k-h