Re: [tip:sched/core 14/47] /bin/bash: line 1: 21320 Segmentation fault sparse -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise -Wno-return-void -Wno-unknown-attribute -fdiagnostic-prefix -D__CHECK_ENDIAN__ -D__NDS32_EB__ --arch=nds32 -mbig-endian -m32 -Wp,-MMD,kernel...

[Yujie Liu]

On 10/10/2021 1:01 AM, Yafang Shao wrote:
> On Sat, Oct 9, 2021 at 8:05 PM kernel test robot <lkp@xxxxxxxxx> wrote:
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
> > head:   b2d5b9cec60fecc72a13191c2c6c05acf60975a5
> > commit: 60f2415e19d3948641149ac6aca137a7be1d1952 [14/47] sched: Make schedstats helpers independent of fair sched class
> > config: nds32-randconfig-s031-20211009 (attached as .config)
> > compiler: nds32le-linux-gcc (GCC) 11.2.0
> > reproduce:
> >          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >          chmod +x ~/bin/make.cross
> >          # apt-get install sparse
> >          # sparse version: v0.6.4
> >          # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=60f2415e19d3948641149ac6aca137a7be1d1952
> >          git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
> >          git fetch --no-tags tip sched/core
> >          git checkout 60f2415e19d3948641149ac6aca137a7be1d1952
> >          # save the attached .config to linux build tree
> >          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=nds32
>
> Hi kernel test robot,
>
> When I'm trying to reproduce it, I find there're lots of "Segmentation
> fault sparse" errors even without my commit,

Hi Yafang,

Thanks for reporting this issue.

We got the same "sparse segfault" errors when reproducing locally.
We also tried to use gdb to locate the segfault position, and got below output:

Program received signal SIGSEGV, Segmentation fault.
0x000055555556945c in copy_expression (expr=0x7ffff3df7710) at inline.c:158
158			if (expr->cast_expression->type == EXPR_INITIALIZER) {

We did some simple investigation and found that it is caused by a null pointer:
...
expr: 0x7ffff3eb20d0	expr->cast_expression: 0x7ffff3eb2110
expr: 0x7ffff3eb28d0	expr->cast_expression: 0x7ffff3eb2910
expr: 0x7ffff3f58050	expr->cast_expression: 0x7ffff3f58090
expr: 0x7ffff3f58850	expr->cast_expression: 0x7ffff3f58890
expr: 0x7ffff3df7710	expr->cast_expression: (nil)



Hi Luc and linux-sparse folks,

We got above "sparse segfault" errors when running "make C=1 ARCH=nds32" on this kernel commit.
We are using sparse v0.6.4.

Could you please help to give some advice about this issue? Thanks.

Regards,
Yujie

> for example,
>
> /bin/sh: line 1: 85051 Segmentation fault      (core dumped) sparse
> -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise
> -Wno-return-void -Wno-unknown-attribute -fdiagnostic-prefix
> -D__CHECK_ENDIAN__ -D__NDS32_EB__ --arch=nds32 -mbig-endian -m32
> -Wp,-MMD,init/.main.o.d -nostdinc -isystem
> /root/0day/gcc-11.2.0-nolibc/nds32le-linux/bin/../lib/gcc/nds32le-linux/11.2.0/include
> -I./arch/nds32/include -I./arch/nds32/include/generated -I./include
> -I./arch/nds32/include/uapi -I./arch/nds32/include/generated/uapi
> -I./include/uapi -I./include/generated/uapi -include
> ./include/linux/compiler-version.h -include ./include/linux/kconfig.h
> -include ./include/linux/compiler_types.h -D__KERNEL__
> -fmacro-prefix-map=./= -Wall -Wundef -Werror=strict-prototypes
> -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE
> -Werror=implicit-function-declaration -Werror=implicit-int
> -Werror=return-type -Wno-format-security -std=gnu89
> -mno-sched-prolog-epilog -mcmodel=large -mno-ext-fpu-sp
> -mno-ext-fpu-dp -mfloat-abi=soft -EB -fno-delete-null-pointer-checks
> -Wno-frame-address -Wno-format-truncation -Wno-format-overflow
> -Wno-address-of-packed-member -O2 -fno-allow-store-data-races
> -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
> -Wframe-larger-than=1024 -fno-stack-protector -Wimplicit-fallthrough=5
> -Wno-main -Wno-unused-but-set-variable -Wno-unused-const-variable
> -fomit-frame-pointer -fno-stack-clash-protection
> -fzero-call-used-regs=used-gpr -fno-inline-functions-called-once
> -falign-functions=64 -Wdeclaration-after-statement -Wvla
> -Wno-pointer-sign -Wno-stringop-truncation -Wno-zero-length-bounds
> -Wno-array-bounds -Wno-stringop-overflow -Wno-restrict
> -Wno-maybe-uninitialized -fno-strict-overflow -fno-stack-check
> -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types
> -Werror=designated-init -Wno-packed-not-aligned -fno-function-sections
> -fno-data-sections -DKBUILD_MODFILE='"init/main"'
> -DKBUILD_BASENAME='"main"' -DKBUILD_MODNAME='"main"'
> -D__KBUILD_MODNAME=kmod_main init/main.c
>
> /bin/sh: line 1: 88064 Segmentation fault      (core dumped) sparse
> -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise
> -Wno-return-void -Wno-unknown-attribute -fdiagnostic-prefix
> -D__CHECK_ENDIAN__ -D__NDS32_EB__ --arch=nds32 -mbig-endian -m32
> -Wp,-MMD,kernel/events/.core.o.d -nostdinc -isystem
> /root/0day/gcc-11.2.0-nolibc/nds32le-linux/bin/../lib/gcc/nds32le-linux/11.2.0/include
> -I./arch/nds32/include -I./arch/nds32/include/generated -I./include
> -I./arch/nds32/include/uapi -I./arch/nds32/include/generated/uapi
> -I./include/uapi -I./include/generated/uapi -include
> ./include/linux/compiler-version.h -include ./include/linux/kconfig.h
> -include ./include/linux/compiler_types.h -D__KERNEL__
> -fmacro-prefix-map=./= -Wall -Wundef -Werror=strict-prototypes
> -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE
> -Werror=implicit-function-declaration -Werror=implicit-int
> -Werror=return-type -Wno-format-security -std=gnu89
> -mno-sched-prolog-epilog -mcmodel=large -mno-ext-fpu-sp
> -mno-ext-fpu-dp -mfloat-abi=soft -EB -fno-delete-null-pointer-checks
> -Wno-frame-address -Wno-format-truncation -Wno-format-overflow
> -Wno-address-of-packed-member -O2 -fno-allow-store-data-races
> -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
> -Wframe-larger-than=1024 -fno-stack-protector -Wimplicit-fallthrough=5
> -Wno-main -Wno-unused-but-set-variable -Wno-unused-const-variable
> -fomit-frame-pointer -fno-stack-clash-protection
> -fzero-call-used-regs=used-gpr -fno-inline-functions-called-once
> -falign-functions=64 -Wdeclaration-after-statement -Wvla
> -Wno-pointer-sign -Wno-stringop-truncation -Wno-zero-length-bounds
> -Wno-array-bounds -Wno-stringop-overflow -Wno-restrict
> -Wno-maybe-uninitialized -fno-strict-overflow -fno-stack-check
> -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types
> -Werror=designated-init -Wno-packed-not-aligned
> -DKBUILD_MODFILE='"kernel/events/core"' -DKBUILD_BASENAME='"core"'
> -DKBUILD_MODNAME='"core"' -D__KBUILD_MODNAME=kmod_core
> kernel/events/core.c
>
> /bin/sh: line 1: 88141 Segmentation fault      (core dumped) sparse
> -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise
> -Wno-return-void -Wno-unknown-attribute -fdiagnostic-prefix
> -D__CHECK_ENDIAN__ -D__NDS32_EB__ --arch=nds32 -mbig-endian -m32
> -Wp,-MMD,mm/.balloon_compaction.o.d -nostdinc -isystem
> /root/0day/gcc-11.2.0-nolibc/nds32le-linux/bin/../lib/gcc/nds32le-linux/11.2.0/include
> -I./arch/nds32/include -I./arch/nds32/include/generated -I./include
> -I./arch/nds32/include/uapi -I./arch/nds32/include/generated/uapi
> -I./include/uapi -I./include/generated/uapi -include
> ./include/linux/compiler-version.h -include ./include/linux/kconfig.h
> -include ./include/linux/compiler_types.h -D__KERNEL__
> -fmacro-prefix-map=./= -Wall -Wundef -Werror=strict-prototypes
> -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE
> -Werror=implicit-function-declaration -Werror=implicit-int
> -Werror=return-type -Wno-format-security -std=gnu89
> -mno-sched-prolog-epilog -mcmodel=large -mno-ext-fpu-sp
> -mno-ext-fpu-dp -mfloat-abi=soft -EB -fno-delete-null-pointer-checks
> -Wno-frame-address -Wno-format-truncation -Wno-format-overflow
> -Wno-address-of-packed-member -O2 -fno-allow-store-data-races
> -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
> -Wframe-larger-than=1024 -fno-stack-protector -Wimplicit-fallthrough=5
> -Wno-main -Wno-unused-but-set-variable -Wno-unused-const-variable
> -fomit-frame-pointer -fno-stack-clash-protection
> -fzero-call-used-regs=used-gpr -fno-inline-functions-called-once
> -falign-functions=64 -Wdeclaration-after-statement -Wvla
> -Wno-pointer-sign -Wno-stringop-truncation -Wno-zero-length-bounds
> -Wno-array-bounds -Wno-stringop-overflow -Wno-restrict
> -Wno-maybe-uninitialized -fno-strict-overflow -fno-stack-check
> -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types
> -Werror=designated-init -Wno-packed-not-aligned
> -DKBUILD_MODFILE='"mm/balloon_compaction"'
> -DKBUILD_BASENAME='"balloon_compaction"'
> -DKBUILD_MODNAME='"balloon_compaction"'
> -D__KBUILD_MODNAME=kmod_balloon_compaction mm/balloon_compaction.c
>
> ....
>
> And those Segmentation fault of sparse can also be found in dmesg,
> [ 5540.785485] sparse[91520]: segfault at 0 ip 0000000000417bff sp
> 00007ffe318f1e80 error 4 in sparse[400000+53000]
> [ 5540.785489] Code: ff ff ff e9 dc fd ff ff 0f 1f 00 48 8b 7f 20 e8
> 97 fc ff ff 48 3b 43 20 48 89 c5 0f 85 3f fd ff ff e9 be fd ff ff 48
> 8b 6f 28 <80> 7d 00 18 0f 85 9b fd ff ff 4c 8b 77 08 4c 8b 6f 20 31 ff
> e8 38
> [ 5541.924384] sparse[91643]: segfault at 0 ip 0000000000417bff sp
> 00007ffc4f408a30 error 4 in sparse[400000+53000]
> [ 5541.924389] Code: ff ff ff e9 dc fd ff ff 0f 1f 00 48 8b 7f 20 e8
> 97 fc ff ff 48 3b 43 20 48 89 c5 0f 85 3f fd ff ff e9 be fd ff ff 48
> 8b 6f 28 <80> 7d 00 18 0f 85 9b fd ff ff 4c 8b 77 08 4c 8b 6f 20 31 ff
> e8 38
> [ 5542.836875] sparse[91748]: segfault at 0 ip 0000000000417bff sp
> 00007ffdebd5d880 error 4 in sparse[400000+53000]
> [ 5542.836881] Code: ff ff ff e9 dc fd ff ff 0f 1f 00 48 8b 7f 20 e8
> 97 fc ff ff 48 3b 43 20 48 89 c5 0f 85 3f fd ff ff e9 be fd ff ff 48
> 8b 6f 28 <80> 7d 00 18 0f 85 9b fd ff ff 4c 8b 77 08 4c 8b 6f 20 31 ff
> e8 38
> [ 5543.763152] sparse[91855]: segfault at 0 ip 0000000000417bff sp
> 00007ffd4b9789c0 error 4 in sparse[400000+53000]
> [ 5543.763158] Code: ff ff ff e9 dc fd ff ff 0f 1f 00 48 8b 7f 20 e8
> 97 fc ff ff 48 3b 43 20 48 89 c5 0f 85 3f fd ff ff e9 be fd ff ff 48
> 8b 6f 28 <80> 7d 00 18 0f 85 9b fd ff ff 4c 8b 77 08 4c 8b 6f 20 31 ff
> e8 38
> [ 5545.193189] sparse[91999]: segfault at 0 ip 0000000000417bff sp
> 00007ffcfa153710 error 4 in sparse[400000+53000]
> [ 5545.193216] Code: ff ff ff e9 dc fd ff ff 0f 1f 00 48 8b 7f 20 e8
> 97 fc ff ff 48 3b 43 20 48 89 c5 0f 85 3f fd ff ff e9 be fd ff ff 48
> 8b 6f 28 <80> 7d 00 18 0f 85 9b fd ff ff 4c 8b 77 08 4c 8b 6f 20 31 ff
> e8 38
> ....
>
> Doesn't that mean there is a bug in the sparse ?
>
>
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@xxxxxxxxx>
> >
> > All errors (new ones prefixed by >>):
> >
> >     kernel/sched/fair.c: note: in included file (through include/linux/ww_mutex.h, include/linux/seqlock.h, include/linux/hrtimer.h, ...):
> >     include/linux/rtmutex.h:70:65: sparse: sparse: Expected ) in function declarator
> >     include/linux/rtmutex.h:70:65: sparse: sparse: got $
> >     kernel/sched/fair.c: note: in included file (through include/linux/sched.h, kernel/sched/sched.h):
> >     include/linux/seccomp.h:96:63: sparse: sparse: Expected ) in function declarator
> >     include/linux/seccomp.h:96:63: sparse: sparse: got $
> >     include/linux/seccomp.h:99:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/seccomp.h:99:1: sparse: sparse: got }
> >     include/linux/seccomp.h:103:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/seccomp.h:103:1: sparse: sparse: got }
> >     include/linux/seccomp.h:116:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/seccomp.h:116:1: sparse: sparse: got }
> >     include/linux/seccomp.h:122:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/seccomp.h:122:1: sparse: sparse: got }
> >     kernel/sched/fair.c: note: in included file (through include/linux/nodemask.h, include/linux/sched.h, kernel/sched/sched.h):
> >     include/linux/numa.h:50:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/numa.h:50:1: sparse: sparse: got }
> >     include/linux/numa.h:54:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/numa.h:54:1: sparse: sparse: got }
> >     include/linux/numa.h:58:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/numa.h:58:1: sparse: sparse: got }
> >     kernel/sched/fair.c: note: in included file (through include/linux/sched.h, kernel/sched/sched.h):
> >     include/linux/nodemask.h:98:54: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:98:54: sparse: sparse: got }
> >     include/linux/nodemask.h:99:19: sparse: sparse: Expected ; at end of declaration
> >     include/linux/nodemask.h:99:19: sparse: sparse: got _unused_nodemask_arg_
> >     include/linux/nodemask.h:109:68: sparse: sparse: Expected ) in function declarator
> >     include/linux/nodemask.h:109:68: sparse: sparse: got *
> >     include/linux/nodemask.h:112:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:112:1: sparse: sparse: got }
> >     include/linux/nodemask.h:116:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:116:1: sparse: sparse: got }
> >     include/linux/nodemask.h:131:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:131:1: sparse: sparse: got }
> >     include/linux/nodemask.h:137:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:137:1: sparse: sparse: got }
> >     include/linux/nodemask.h:143:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:143:1: sparse: sparse: got }
> >     include/linux/nodemask.h:149:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:149:1: sparse: sparse: got }
> >     include/linux/nodemask.h:159:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:159:1: sparse: sparse: got }
> >     include/linux/nodemask.h:167:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:167:1: sparse: sparse: got }
> >     include/linux/nodemask.h:175:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:175:1: sparse: sparse: got }
> >     include/linux/nodemask.h:183:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:183:1: sparse: sparse: got }
> >     include/linux/nodemask.h:191:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:191:1: sparse: sparse: got }
> >     include/linux/nodemask.h:199:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:199:1: sparse: sparse: got }
> >     include/linux/nodemask.h:207:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:207:1: sparse: sparse: got }
> >     include/linux/nodemask.h:215:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:215:1: sparse: sparse: got }
> >     include/linux/nodemask.h:223:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:223:1: sparse: sparse: got }
> >     include/linux/nodemask.h:229:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:229:1: sparse: sparse: got }
> >     include/linux/nodemask.h:235:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:235:1: sparse: sparse: got }
> >     include/linux/nodemask.h:241:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:241:1: sparse: sparse: got }
> >     include/linux/nodemask.h:249:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:249:1: sparse: sparse: got }
> >     include/linux/nodemask.h:257:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:257:1: sparse: sparse: got }
> >     include/linux/nodemask.h:265:16: sparse: sparse: Expected ) in nested declarator
> >     include/linux/nodemask.h:265:16: sparse: sparse: got <
> >     include/linux/nodemask.h:265:16: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:265:16: sparse: sparse: got }
> >     include/linux/nodemask.h:266:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:266:1: sparse: sparse: got }
> >     include/linux/nodemask.h:271:16: sparse: sparse: Expected ) in nested declarator
> >     include/linux/nodemask.h:271:16: sparse: sparse: got <
> >     include/linux/nodemask.h:271:16: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:271:16: sparse: sparse: got }
> >     include/linux/nodemask.h:272:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:272:1: sparse: sparse: got }
> >     include/linux/nodemask.h:281:53: sparse: sparse: Expected ) in function declarator
> >     include/linux/nodemask.h:281:53: sparse: sparse: got *
> >     include/linux/nodemask.h:284:9: sparse: sparse: Expected ) in function declarator
> >     include/linux/nodemask.h:284:9: sparse: sparse: got (
> >     include/linux/nodemask.h:285:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:285:1: sparse: sparse: got }
> >     include/linux/nodemask.h:301:16: sparse: sparse: Expected ) in nested declarator
> >     include/linux/nodemask.h:301:16: sparse: sparse: got <
> >     include/linux/nodemask.h:301:16: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:301:16: sparse: sparse: got }
> >     include/linux/nodemask.h:303:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:303:1: sparse: sparse: got }
> >     include/linux/nodemask.h:337:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:337:1: sparse: sparse: got }
> >     include/linux/nodemask.h:343:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:343:1: sparse: sparse: got }
> >     include/linux/nodemask.h:351:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:351:1: sparse: sparse: got }
> >     include/linux/nodemask.h:359:1: sparse: sparse: Expected ; at the end of type declaration
> >     include/linux/nodemask.h:359:1: sparse: sparse: too many errors
> > > > /bin/bash: line 1: 21320 Segmentation fault      sparse -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise -Wno-return-void -Wno-unknown-attribute -fdiagnostic-prefix -D__CHECK_ENDIAN__ -D__NDS32_EB__ --arch=nds32 -mbig-endian -m32 -Wp,-MMD,kernel/sched/.fair.o.d -nostdinc -isystem /opt/cross/gcc-11.2.0-nolibc/nds32le-linux/bin/../lib/gcc/nds32le-linux/11.2.0/include -Iarch/nds32/include -I./arch/nds32/include/generated -Iinclude -I./include -Iarch/nds32/include/uapi -I./arch/nds32/include/generated/uapi -Iinclude/uapi -I./include/generated/uapi -include include/linux/compiler-version.h -include include/linux/kconfig.h -include include/linux/compiler_types.h -D__KERNEL__ -fmacro-prefix-map== -DKBUILD_EXTRA_WARN1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Wno-format-security -std=gnu89 -mno-sched-prolog-epilog -mcmodel=large -
>   mno-ext-fpu-sp -mno-ext-fpu-dp -mfloat-abi=soft -EB -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-address-of-packed-member -O2 -fno-allow-store-data-races -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining -Wframe-larger-than=1024 -fno-stack-protector -Wimplicit-fallthrough=5 -Wno-main -Wno-unused-but-set-variable -Wno-unused-const-variable -fomit-frame-pointer -fno-stack-clash-protection -fzero-call-used-regs=used-gpr -fno-inline-functions-called-once -falign-functions=64 -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -Wno-zero-length-bounds -Wno-array-bounds -Wno-stringop-overflow -Wno-restrict -Wno-maybe-uninitialized -fno-strict-overflow -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -Wno-packed-not-aligned -Wextra -Wunused -Wno-unused-parameter -Wmissing-declarations -Wmissing-format-attribute -Wmissing-prototypes -Wold-s
>   tyle-definition -Wmissing-include-dirs -Wunused-but-set-variable -Wunused-const-variable -Wpacked-not-aligned -Wstringop-truncation -Wno-missing-field-initializers -Wno-sign-compare -Wno-type-limits -I kernel/sched -I ./kernel/sched -DKBUILD_MODFILE='"kernel/sched/fair"' -DKBUILD_BASENAME='"fair"' -DKBUILD_MODNAME='"fair"' -D__KBUILD_MODNAME=kmod_fair kernel/sched/fair.c
> > ---
> > 0-DAY CI Kernel Test Service, Intel Corporation
> > https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx