ppc64le: ftrace self-tests and $(CC_FLAGS_FTRACE) broken?

ppc64le: ftrace self-tests and $(CC_FLAGS_FTRACE) broken?

[Joe Lawrence]

Hi Steve, Nicholas,

I stumbled across this while working on livepatch self-tests, which like
the ftrace self-tests, specify $(CC_FLAGS_FTRACE) to ensure that target
functions are indeed trace-able.

On ppc64le, v5.0 fails the self-tests on my machine:

  % gcc --version
  gcc (GCC) 8.2.1 20180905 (Red Hat 8.2.1-3)

  % git checkout v5.0

  % grep FTRACE_SELFTEST .config
  CONFIG_FTRACE_SELFTEST=y

After building the kernel, I noticed no mcount sections and of course
the self-tests fail as it can't hook functions:

  % readelf --sections kernel/trace/trace_selftest_dynamic.o | grep mcount
  (nothing)

  [ ... snip ... ]
  [  126.147892] Testing all events: OK
  [  126.390487] WARNING: CPU: 0 PID: 1 at kernel/trace/trace_events.c:3421 event_trace_self_tests_init+0x94/0xf4
  [  126.390498] Modules linked in:
  [  126.390510] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         5.0.0 #10
  [  126.390520] NIP:  c000000000f044d4 LR: c000000000f044cc CTR: c000000000b63d70
  [  126.390530] REGS: c0000001fb183910 TRAP: 0700   Tainted: G        W          (5.0.0)
  [  126.390540] MSR:  8000000002029033 <SF,VEC,EE,ME,IR,DR,RI,LE>  CR: 28000222  XER: 20040007
  [  126.390564] CFAR: c00000000025b1f4 IRQMASK: 0
  [  126.390564] GPR00: c000000000f044cc c0000001fb183ba0 c000000001453c00 ffffffffffffffed
  [  126.390564] GPR04: 0000000000000000 c0000000017a0aac 000000000000037d c0000001fb142d00
  [  126.390564] GPR08: 0000000000000000 0000000000000001 0000000000000000 0000000000000000
  [  126.390564] GPR12: 0000000000000000 c000000001880000 c000000000010530 0000000000000000
  [  126.390564] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
  [  126.390564] GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
  [  126.390564] GPR24: 0000000000000000 0000000000000000 c000000000eb8908 c000000000f4ea68
  [  126.390564] GPR28: c000000000f4eaa8 0000000000000000 c000000000f04440 c000000000f581a8
  [  126.390662] NIP [c000000000f044d4] event_trace_self_tests_init+0x94/0xf4
  [  126.390672] LR [c000000000f044cc] event_trace_self_tests_init+0x8c/0xf4
  [  126.390682] Call Trace:
  [  126.390690] [c0000001fb183ba0] [c000000000f044cc] event_trace_self_tests_init+0x8c/0xf4 (unreliable)
  [  126.390705] [c0000001fb183c10] [c000000000010134] do_one_initcall+0x64/0x264
  [  126.390719] [c0000001fb183ce0] [c000000000ed443c] kernel_init_freeable+0x36c/0x470
  [  126.390731] [c0000001fb183db0] [c000000000010554] kernel_init+0x2c/0x148
  [  126.390744] [c0000001fb183e20] [c00000000000b65c] ret_from_kernel_thread+0x5c/0x80
  [  126.390755] Instruction dump:
  [  126.390765] 3fe2ffb0 f9284578 3bff3d50 794ad182 0b0a0000 2fa90000 419e0058 3bff0858
  [  126.390789] 7fe3fb78 4b356cc1 60000000 54690ffe <0b090000> 2f830000 409c0018 3c62ff96
  [  126.390814] ---[ end trace b5898e7f7f73e163 ]---
  [  126.390822] Failed to enable function tracer for event tests

I git bisected to 6977f95e63b9 ("powerpc: avoid -mno-sched-epilog on GCC
4.9 and newer").  Reverting this change and rebuilding, I could see the
mcount sections once again:

  % readelf --sections kernel/trace/trace_selftest_dynamic.o | grep mcount
    [ 3] __mcount_loc      PROGBITS         0000000000000000  00000060
    [ 4] .rela__mcount_loc RELA             0000000000000000  000258c8

Reboot and the self-test now passes.


Perhaps this is gcc version specific?  I didn't see any other reports,
so maybe its specific to my config.  If I run make V=1, I can see that
gcc is called with '-pg -mprofile-kernel', but then the record_mcount
script is skipped.  Any ideas?

Regards,

-- Joe

Re: ppc64le: ftrace self-tests and $(CC_FLAGS_FTRACE) broken?

[Steven Rostedt]

On Sat, 23 Mar 2019 09:19:50 -0400
Joe Lawrence <joe.lawrence@redhat.com> wrote:

> Perhaps this is gcc version specific?  I didn't see any other reports,
> so maybe its specific to my config.  If I run make V=1, I can see that
> gcc is called with '-pg -mprofile-kernel', but then the record_mcount
> script is skipped.  Any ideas?

But you see it running the script if you remove that commit? Do you
happen to see -mrecord-mcount at all in a V=1 make?

-- Steve

Re: ppc64le: ftrace self-tests and $(CC_FLAGS_FTRACE) broken?

[Joe Lawrence]

On Sat, Mar 23, 2019 at 12:17:32PM -0400, Steven Rostedt wrote:
> On Sat, 23 Mar 2019 09:19:50 -0400
> Joe Lawrence <joe.lawrence@redhat.com> wrote:
> 
> > Perhaps this is gcc version specific?  I didn't see any other reports,
> > so maybe its specific to my config.  If I run make V=1, I can see that
> > gcc is called with '-pg -mprofile-kernel', but then the record_mcount
> > script is skipped.  Any ideas?
> 
> But you see it running the script if you remove that commit? Do you
> happen to see -mrecord-mcount at all in a V=1 make?
> 

Hey Steve,

Here's a diff of output from 'make V=1 kernel/trace/trace_selftest_dynamic.o' 
with stock v5.0 vs. v5.0 and that commit reverted.  The part that I
think is interesting is where it decides to invoke recordmcount.pl

I can send or pastebin the entire output from make if that is easier to
read.

-- Joe

--- v5.0.out	2019-03-23 12:54:09.540042581 -0400
+++ v5.0-revert.out	2019-03-23 12:53:05.253264482 -0400
@@ -20,29 +20,18 @@ make -f ./scripts/Makefile.build obj=scr
 make -f ./scripts/Makefile.build obj=scripts/selinux/genheaders need-builtin=
 make -f ./scripts/Makefile.build obj=scripts/selinux/mdp need-builtin=
 make -f ./scripts/Makefile.build obj=scripts/mod
-  gcc -Wp,-MD,scripts/mod/.empty.o.d  -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-var-tracking-assignments -g -gdwarf-4 -pg -mprofile-kernel -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned    -DKBUILD_BASENAME='"empty"' -DKBUILD_MODNAME='"empty"' -c -o scripts/mod/empty.o scripts/mod/empty.c
-  if objdump -h scripts/mod/empty.o | grep -q __ksymtab; then gcc -E -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx   -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0  -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable  -fno-var-tracking-assignments -g -gdwarf-4 -pg -mprofile-kernel    -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned     -D__GENKSYMS__ -Wp,-MD,scripts/mod/.empty.o.d  -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-var-tracking-assignments -g -gdwarf-4 -pg -mprofile-kernel -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned    -DKBUILD_BASENAME='"empty"' -DKBUILD_MODNAME='"empty"' scripts/mod/empty.c | scripts/genksyms/genksyms  -R  -r /dev/null > scripts/mod/.tmp_empty.ver; ld  -EL -m elf64lppc -r -o scripts/mod/.tmp_empty.o scripts/mod/empty.o -T scripts/mod/.tmp_empty.ver; mv -f scripts/mod/.tmp_empty.o scripts/mod/empty.o; rm -f scripts/mod/.tmp_empty.ver; fi
-  if [ "-pg -mprofile-kernel " = "-pg -mprofile-kernel " ]; then perl ./scripts/recordmcount.pl "powerpc" "little" "64" "objdump" "objcopy" "gcc -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1   -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx   -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0  -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable  -fno-var-tracking-assignments -g -gdwarf-4 -pg -mprofile-kernel    -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned     " "ld  -EL -m elf64lppc" "nm --synthetic" "" "" "0" "scripts/mod/empty.o"; fi
-  scripts/mod/mk_elfconfig < scripts/mod/empty.o > scripts/mod/elfconfig.h
-  gcc -Wp,-MD,scripts/mod/.modpost.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89       -c -o scripts/mod/modpost.o scripts/mod/modpost.c
-  gcc -Wp,-MD,scripts/mod/.devicetable-offsets.s.d -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -pg -mprofile-kernel -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned -DKBUILD_BASENAME='"devicetable_offsets"' -DKBUILD_MODNAME='"devicetable_offsets"'  -fverbose-asm -S -o scripts/mod/devicetable-offsets.s scripts/mod/devicetable-offsets.c
 set -e; mkdir -p scripts/mod/; { 	 echo "#ifndef __DEVICETABLE_OFFSETS_H__"; echo "#define __DEVICETABLE_OFFSETS_H__"; echo "/*"; echo " * DO NOT MODIFY."; echo " *"; echo " * This file was generated by Kbuild"; echo " */"; echo ""; sed -ne 	's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; /^->/{s:->#\(.*\):/* \1 */:; s:^->\([^ ]*\) [\$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}' < scripts/mod/devicetable-offsets.s; echo ""; echo "#endif"; } > scripts/mod/devicetable-offsets.h.tmp; if [ -r scripts/mod/devicetable-offsets.h ] && cmp -s scripts/mod/devicetable-offsets.h scripts/mod/devicetable-offsets.h.tmp; then rm -f scripts/mod/devicetable-offsets.h.tmp; else : '  UPD     scripts/mod/devicetable-offsets.h'; mv -f scripts/mod/devicetable-offsets.h.tmp scripts/mod/devicetable-offsets.h; fi
-  gcc -Wp,-MD,scripts/mod/.file2alias.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89       -c -o scripts/mod/file2alias.o scripts/mod/file2alias.c
-  gcc -Wp,-MD,scripts/mod/.sumversion.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89       -c -o scripts/mod/sumversion.o scripts/mod/sumversion.c
-  gcc   -o scripts/mod/modpost scripts/mod/modpost.o scripts/mod/file2alias.o scripts/mod/sumversion.o   
 make -f ./scripts/Makefile.build obj=.
-  gcc -Wp,-MD,kernel/.bounds.s.d -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -pg -mprofile-kernel -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned -DKBUILD_BASENAME='"bounds"' -DKBUILD_MODNAME='"bounds"'  -fverbose-asm -S -o kernel/bounds.s kernel/bounds.c
 set -e; mkdir -p include/generated/; { 	 echo "#ifndef __LINUX_BOUNDS_H__"; echo "#define __LINUX_BOUNDS_H__"; echo "/*"; echo " * DO NOT MODIFY."; echo " *"; echo " * This file was generated by Kbuild"; echo " */"; echo ""; sed -ne 	's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; /^->/{s:->#\(.*\):/* \1 */:; s:^->\([^ ]*\) [\$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}' < kernel/bounds.s; echo ""; echo "#endif"; } > include/generated/bounds.h.tmp; if [ -r include/generated/bounds.h ] && cmp -s include/generated/bounds.h include/generated/bounds.h.tmp; then rm -f include/generated/bounds.h.tmp; else : '  UPD     include/generated/bounds.h'; mv -f include/generated/bounds.h.tmp include/generated/bounds.h; fi
 set -e; mkdir -p include/generated/; { echo 100 | bc -q kernel/time/timeconst.bc; } > include/generated/timeconst.h.tmp; if [ -r include/generated/timeconst.h ] && cmp -s include/generated/timeconst.h include/generated/timeconst.h.tmp; then rm -f include/generated/timeconst.h.tmp; else : '  UPD     include/generated/timeconst.h'; mv -f include/generated/timeconst.h.tmp include/generated/timeconst.h; fi
-  gcc -Wp,-MD,arch/powerpc/kernel/.asm-offsets.s.d -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -pg -mprofile-kernel -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned -DKBUILD_BASENAME='"asm_offsets"' -DKBUILD_MODNAME='"asm_offsets"'  -fverbose-asm -S -o arch/powerpc/kernel/asm-offsets.s arch/powerpc/kernel/asm-offsets.c
 set -e; mkdir -p include/generated/; { 	 echo "#ifndef __ASM_OFFSETS_H__"; echo "#define __ASM_OFFSETS_H__"; echo "/*"; echo " * DO NOT MODIFY."; echo " *"; echo " * This file was generated by Kbuild"; echo " */"; echo ""; sed -ne 	's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; /^->/{s:->#\(.*\):/* \1 */:; s:^->\([^ ]*\) [\$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}' < arch/powerpc/kernel/asm-offsets.s; echo ""; echo "#endif"; } > include/generated/asm-offsets.h.tmp; if [ -r include/generated/asm-offsets.h ] && cmp -s include/generated/asm-offsets.h include/generated/asm-offsets.h.tmp; then rm -f include/generated/asm-offsets.h.tmp; else : '  UPD     include/generated/asm-offsets.h'; mv -f include/generated/asm-offsets.h.tmp include/generated/asm-offsets.h; fi
-  /bin/sh scripts/checksyscalls.sh gcc -Wp,-MD,./.missing-syscalls.d  -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-var-tracking-assignments -g -gdwarf-4 -pg -mprofile-kernel -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned    -DKBUILD_BASENAME='"missing_syscalls"' -DKBUILD_MODNAME='"missing_syscalls"' 
+  /bin/sh scripts/checksyscalls.sh gcc -Wp,-MD,./.missing-syscalls.d  -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-var-tracking-assignments -g -gdwarf-4 -pg -mprofile-kernel -mno-sched-epilog -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned    -DKBUILD_BASENAME='"missing_syscalls"' -DKBUILD_MODNAME='"missing_syscalls"' 
 <stdin>:1478:2: warning: #warning syscall pidfd_send_signal not implemented [-Wcpp]
 <stdin>:1481:2: warning: #warning syscall io_uring_setup not implemented [-Wcpp]
 <stdin>:1484:2: warning: #warning syscall io_uring_enter not implemented [-Wcpp]
 <stdin>:1487:2: warning: #warning syscall io_uring_register not implemented [-Wcpp]
   /bin/sh scripts/atomic/check-atomics.sh
 make -f ./scripts/Makefile.build obj=kernel/trace kernel/trace/trace_selftest_dynamic.o
-  gcc -Wp,-MD,kernel/trace/.trace_selftest_dynamic.o.d  -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-var-tracking-assignments -g -gdwarf-4 -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned -mstack-protector-guard-offset=2936 -D_TASK_CPU=300 -pg -mprofile-kernel    -DKBUILD_BASENAME='"trace_selftest_dynamic"' -DKBUILD_MODNAME='"trace_selftest_dynamic"' -c -o kernel/trace/trace_selftest_dynamic.o kernel/trace/trace_selftest_dynamic.c
-  if objdump -h kernel/trace/trace_selftest_dynamic.o | grep -q __ksymtab; then gcc -E -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx   -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0  -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable  -fno-var-tracking-assignments -g -gdwarf-4 -pg -mprofile-kernel    -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned     -mstack-protector-guard-offset=2936 -D_TASK_CPU=300 -D__GENKSYMS__ -Wp,-MD,kernel/trace/.trace_selftest_dynamic.o.d  -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-var-tracking-assignments -g -gdwarf-4 -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned -mstack-protector-guard-offset=2936 -D_TASK_CPU=300 -pg -mprofile-kernel    -DKBUILD_BASENAME='"trace_selftest_dynamic"' -DKBUILD_MODNAME='"trace_selftest_dynamic"' kernel/trace/trace_selftest_dynamic.c | scripts/genksyms/genksyms  -R  -r /dev/null > kernel/trace/.tmp_trace_selftest_dynamic.ver; ld  -EL -m elf64lppc -r -o kernel/trace/.tmp_trace_selftest_dynamic.o kernel/trace/trace_selftest_dynamic.o -T kernel/trace/.tmp_trace_selftest_dynamic.ver; mv -f kernel/trace/.tmp_trace_selftest_dynamic.o kernel/trace/trace_selftest_dynamic.o; rm -f kernel/trace/.tmp_trace_selftest_dynamic.ver; fi
-  if [ "" = "-pg -mprofile-kernel " ]; then perl ./scripts/recordmcount.pl "powerpc" "little" "64" "objdump" "objcopy" "gcc -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1   -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx   -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0  -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable  -fno-var-tracking-assignments -g -gdwarf-4    -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned     -mstack-protector-guard-offset=2936 -D_TASK_CPU=300 " "ld  -EL -m elf64lppc" "nm --synthetic" "" "" "0" "kernel/trace/trace_selftest_dynamic.o"; fi
+  gcc -Wp,-MD,kernel/trace/.trace_selftest_dynamic.o.d  -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-var-tracking-assignments -g -gdwarf-4 -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned -mstack-protector-guard-offset=2936 -D_TASK_CPU=300 -pg -mprofile-kernel -mno-sched-epilog    -DKBUILD_BASENAME='"trace_selftest_dynamic"' -DKBUILD_MODNAME='"trace_selftest_dynamic"' -c -o kernel/trace/trace_selftest_dynamic.o kernel/trace/trace_selftest_dynamic.c
+  if objdump -h kernel/trace/trace_selftest_dynamic.o | grep -q __ksymtab; then gcc -E -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx   -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0  -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable  -fno-var-tracking-assignments -g -gdwarf-4 -pg -mprofile-kernel -mno-sched-epilog   -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned     -mstack-protector-guard-offset=2936 -D_TASK_CPU=300 -D__GENKSYMS__ -Wp,-MD,kernel/trace/.trace_selftest_dynamic.o.d  -nostdinc -isystem /usr/lib/gcc/ppc64le-redhat-linux/8/include -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1 -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-var-tracking-assignments -g -gdwarf-4 -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned -mstack-protector-guard-offset=2936 -D_TASK_CPU=300 -pg -mprofile-kernel -mno-sched-epilog    -DKBUILD_BASENAME='"trace_selftest_dynamic"' -DKBUILD_MODNAME='"trace_selftest_dynamic"' kernel/trace/trace_selftest_dynamic.c | scripts/genksyms/genksyms  -R  -r /dev/null > kernel/trace/.tmp_trace_selftest_dynamic.ver; ld  -EL -m elf64lppc -r -o kernel/trace/.tmp_trace_selftest_dynamic.o kernel/trace/trace_selftest_dynamic.o -T kernel/trace/.tmp_trace_selftest_dynamic.ver; mv -f kernel/trace/.tmp_trace_selftest_dynamic.o kernel/trace/trace_selftest_dynamic.o; rm -f kernel/trace/.tmp_trace_selftest_dynamic.ver; fi
+  if [ "-pg -mprofile-kernel -mno-sched-epilog" = "-pg -mprofile-kernel -mno-sched-epilog" ]; then perl ./scripts/recordmcount.pl "powerpc" "little" "64" "objdump" "objcopy" "gcc -D__KERNEL__ -Iarch/powerpc -DHAVE_AS_ATHIGH=1   -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mlittle-endian -m64 -msoft-float -pipe -mtraceback=no -mabi=elfv2 -mcmodel=medium -mno-pointers-to-nested-functions -mcpu=power8 -mtune=power9 -mno-altivec -mno-vsx   -fno-dwarf2-cfi-asm -mno-string -Wa,-maltivec -Wa,-mpower4 -Wa,-many -mno-strict-align -mlittle-endian -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 --param=allow-store-data-races=0  -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wno-unused-const-variable  -fno-var-tracking-assignments -g -gdwarf-4    -fno-inline-functions-called-once -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=./= -Wno-packed-not-aligned     -mstack-protector-guard-offset=2936 -D_TASK_CPU=300 " "ld  -EL -m elf64lppc" "nm --synthetic" "" "" "0" "kernel/trace/trace_selftest_dynamic.o"; fi

Re: ppc64le: ftrace self-tests and $(CC_FLAGS_FTRACE) broken?

[Joe Lawrence]

On 03/23/2019 12:17 PM, Steven Rostedt wrote:
> On Sat, 23 Mar 2019 09:19:50 -0400
> Joe Lawrence <joe.lawrence@redhat.com> wrote:
> 
>> Perhaps this is gcc version specific?  I didn't see any other reports,
>> so maybe its specific to my config.  If I run make V=1, I can see that
>> gcc is called with '-pg -mprofile-kernel', but then the record_mcount
>> script is skipped.  Any ideas?
> 
> But you see it running the script if you remove that commit? Do you
> happen to see -mrecord-mcount at all in a V=1 make?
> 

See entire make output from the two runs here:
http://people.redhat.com/~jolawren/ppc64le-mprofile/

-- Joe

Re: ppc64le: ftrace self-tests and $(CC_FLAGS_FTRACE) broken?

[Joe Lawrence]

On 3/23/19 1:27 PM, Joe Lawrence wrote:
> On 03/23/2019 12:17 PM, Steven Rostedt wrote:
>> On Sat, 23 Mar 2019 09:19:50 -0400
>> Joe Lawrence <joe.lawrence@redhat.com> wrote:
>>
>>> Perhaps this is gcc version specific?  I didn't see any other reports,
>>> so maybe its specific to my config.  If I run make V=1, I can see that
>>> gcc is called with '-pg -mprofile-kernel', but then the record_mcount
>>> script is skipped.  Any ideas?
>>
>> But you see it running the script if you remove that commit? Do you
>> happen to see -mrecord-mcount at all in a V=1 make?
>>
> 
> See entire make output from the two runs here:
> http://people.redhat.com/~jolawren/ppc64le-mprofile/

Mystery solved!  That other commit inadvertently added a trailing space 
to CC_FLAGS_FTRACE, which then confused the findstring call in the 
cmd_record_mcount Makefile function.

Workaround patch just posted ... kbuild experts can suggest better fixes 
if that one is sub optimal.

Thanks,

-- Joe