Public bug reported:

[ Impact ]

DKMS make.log for dm-writeboost-2.2.16 for kernel 6.14.0-15-generic (x86_64)
Thu May 15 21:25:13 UTC 2025
make -C /lib/modules/6.14.0-15-generic/build 
M=/var/lib/dkms/dm-writeboost/2.2.16/build modules
make[1]: Entering directory '/usr/src/linux-headers-6.14.0-15-generic'
make  -C /var/lib/dkms/dm-writeboost/2.2.16/build \
-f /usr/src/linux-headers-6.14.0-15-generic/Makefile modules
make[2]: Entering directory '/var/lib/dkms/dm-writeboost/2.2.16/build'
make --no-print-directory -C /var/lib/dkms/dm-writeboost/2.2.16/build \
-f /usr/src/linux-headers-6.14.0-15-generic/Makefile modules
warning: the compiler differs from the one used to build the kernel
  The kernel was built by: x86_64-linux-gnu-gcc-13 (Ubuntu 
13.3.0-6ubuntu2~24.04) 13.3.0
  You are using:           gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
make -f /usr/src/linux-headers-6.14.0-15-generic/scripts/Makefile.build obj=. 
need-builtin=1 need-modorder=1 
# cmd_mod dm-writeboost.mod
  printf '%s
'   dm-writeboost-target.o dm-writeboost-metadata.o dm-writeboost-daemon.o | 
awk '!x[$0]++ { print("./"$0) }' > dm-writeboost.mod
# CC [M]  dm-writeboost-target.o
  gcc-13 -Wp,-MMD,./.dm-writeboost-target.o.d -nostdinc 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include/generated 
-I/usr/src/linux-headers-6.14.0-15-generic/include 
-I/usr/src/linux-headers-6.14.0-15-generic/include 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include/uapi 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include/generated/uapi 
-I/usr/src/linux-headers-6.14.0-15-generic/include/uapi 
-I/usr/src/linux-headers-6.14.0-15-generic/include/generated/uapi -include 
/usr/src/linux-headers-6.14.0-15-generic/include/linux/compiler-version.h 
-include /usr/src/linux-headers-6.14.0-15-generic/include/linux/kconfig.h 
-I/usr/src/linux-headers-6.14.0-15-generic/ubuntu/include -include 
/usr/src/linux-headers-6.14.0-15-generic/include/linux/compiler_types.h 
-D__KERNEL__ -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE 
-fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx 
-fcf-protection=none -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 
-mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic 
-mno-red-zone -mcmodel=kernel -Wno-sign-compare -fno-asynchronous-unwind-tables 
-mindirect-branch=thunk-extern -mindirect-branch-register 
-mindirect-branch-cs-prefix -mfunction-return=thunk-extern -fno-jump-tables 
-mharden-sls=all -fpatchable-function-entry=16,16 
-fno-delete-null-pointer-checks -O2 -fno-allow-store-data-races 
-fstack-protector-strong -fno-omit-frame-pointer -fno-optimize-sibling-calls 
-ftrivial-auto-var-init=zero -fno-stack-clash-protection 
-fzero-call-used-regs=used-gpr -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY 
-falign-functions=16 -fstrict-flex-arrays=3 -fno-strict-overflow 
-fno-stack-check -fconserve-stack -Wall -Wundef 
-Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type 
-Werror=strict-prototypes -Wno-format-security -Wno-trigraphs 
-Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations 
-Wmissing-prototypes -Wframe-larger-than=1024 -Wno-main -Wno-dangling-pointer 
-Wvla -Wno-pointer-sign -Wcast-function-type -Wno-stringop-overflow 
-Wno-array-bounds -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 
-Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init 
-Wenum-conversion -Wextra -Wunused -Wno-unused-but-set-variable 
-Wno-unused-const-variable -Wno-packed-not-aligned -Wno-format-overflow 
-Wno-format-truncation -Wno-stringop-truncation -Wno-override-init 
-Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value 
-Wno-maybe-uninitialized -Wno-sign-compare -Wno-unused-parameter -g -gdwarf-5  
-fsanitize=bounds-strict -fsanitize=shift -fsanitize=bool -fsanitize=enum  
-fsanitize=signed-integer-overflow  -DMODULE  
-DKBUILD_BASENAME='"dm_writeboost_target"' -DKBUILD_MODNAME='"dm_writeboost"' 
-D__KBUILD_MODNAME=kmod_dm_writeboost -c -o dm-writeboost-target.o 
dm-writeboost-target.c   ; 
/usr/src/linux-headers-6.14.0-15-generic/tools/objtool/objtool 
--hacks=jump_label --hacks=noinstr --hacks=skylake --retpoline --rethunk --sls 
--stackval --static-call --uaccess --prefix=16   --module dm-writeboost-target.o
# CC [M]  dm-writeboost-metadata.o
  gcc-13 -Wp,-MMD,./.dm-writeboost-metadata.o.d -nostdinc 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include/generated 
-I/usr/src/linux-headers-6.14.0-15-generic/include 
-I/usr/src/linux-headers-6.14.0-15-generic/include 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include/uapi 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include/generated/uapi 
-I/usr/src/linux-headers-6.14.0-15-generic/include/uapi 
-I/usr/src/linux-headers-6.14.0-15-generic/include/generated/uapi -include 
/usr/src/linux-headers-6.14.0-15-generic/include/linux/compiler-version.h 
-include /usr/src/linux-headers-6.14.0-15-generic/include/linux/kconfig.h 
-I/usr/src/linux-headers-6.14.0-15-generic/ubuntu/include -include 
/usr/src/linux-headers-6.14.0-15-generic/include/linux/compiler_types.h 
-D__KERNEL__ -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE 
-fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx 
-fcf-protection=none -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 
-mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic 
-mno-red-zone -mcmodel=kernel -Wno-sign-compare -fno-asynchronous-unwind-tables 
-mindirect-branch=thunk-extern -mindirect-branch-register 
-mindirect-branch-cs-prefix -mfunction-return=thunk-extern -fno-jump-tables 
-mharden-sls=all -fpatchable-function-entry=16,16 
-fno-delete-null-pointer-checks -O2 -fno-allow-store-data-races 
-fstack-protector-strong -fno-omit-frame-pointer -fno-optimize-sibling-calls 
-ftrivial-auto-var-init=zero -fno-stack-clash-protection 
-fzero-call-used-regs=used-gpr -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY 
-falign-functions=16 -fstrict-flex-arrays=3 -fno-strict-overflow 
-fno-stack-check -fconserve-stack -Wall -Wundef 
-Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type 
-Werror=strict-prototypes -Wno-format-security -Wno-trigraphs 
-Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations 
-Wmissing-prototypes -Wframe-larger-than=1024 -Wno-main -Wno-dangling-pointer 
-Wvla -Wno-pointer-sign -Wcast-function-type -Wno-stringop-overflow 
-Wno-array-bounds -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 
-Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init 
-Wenum-conversion -Wextra -Wunused -Wno-unused-but-set-variable 
-Wno-unused-const-variable -Wno-packed-not-aligned -Wno-format-overflow 
-Wno-format-truncation -Wno-stringop-truncation -Wno-override-init 
-Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value 
-Wno-maybe-uninitialized -Wno-sign-compare -Wno-unused-parameter -g -gdwarf-5  
-fsanitize=bounds-strict -fsanitize=shift -fsanitize=bool -fsanitize=enum  
-fsanitize=signed-integer-overflow  -DMODULE  
-DKBUILD_BASENAME='"dm_writeboost_metadata"' -DKBUILD_MODNAME='"dm_writeboost"' 
-D__KBUILD_MODNAME=kmod_dm_writeboost -c -o dm-writeboost-metadata.o 
dm-writeboost-metadata.c   ; 
/usr/src/linux-headers-6.14.0-15-generic/tools/objtool/objtool 
--hacks=jump_label --hacks=noinstr --hacks=skylake --retpoline --rethunk --sls 
--stackval --static-call --uaccess --prefix=16   --module 
dm-writeboost-metadata.o
# CC [M]  dm-writeboost-daemon.o
  gcc-13 -Wp,-MMD,./.dm-writeboost-daemon.o.d -nostdinc 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include/generated 
-I/usr/src/linux-headers-6.14.0-15-generic/include 
-I/usr/src/linux-headers-6.14.0-15-generic/include 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include/uapi 
-I/usr/src/linux-headers-6.14.0-15-generic/arch/x86/include/generated/uapi 
-I/usr/src/linux-headers-6.14.0-15-generic/include/uapi 
-I/usr/src/linux-headers-6.14.0-15-generic/include/generated/uapi -include 
/usr/src/linux-headers-6.14.0-15-generic/include/linux/compiler-version.h 
-include /usr/src/linux-headers-6.14.0-15-generic/include/linux/kconfig.h 
-I/usr/src/linux-headers-6.14.0-15-generic/ubuntu/include -include 
/usr/src/linux-headers-6.14.0-15-generic/include/linux/compiler_types.h 
-D__KERNEL__ -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE 
-fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx 
-fcf-protection=none -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 
-mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic 
-mno-red-zone -mcmodel=kernel -Wno-sign-compare -fno-asynchronous-unwind-tables 
-mindirect-branch=thunk-extern -mindirect-branch-register 
-mindirect-branch-cs-prefix -mfunction-return=thunk-extern -fno-jump-tables 
-mharden-sls=all -fpatchable-function-entry=16,16 
-fno-delete-null-pointer-checks -O2 -fno-allow-store-data-races 
-fstack-protector-strong -fno-omit-frame-pointer -fno-optimize-sibling-calls 
-ftrivial-auto-var-init=zero -fno-stack-clash-protection 
-fzero-call-used-regs=used-gpr -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY 
-falign-functions=16 -fstrict-flex-arrays=3 -fno-strict-overflow 
-fno-stack-check -fconserve-stack -Wall -Wundef 
-Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type 
-Werror=strict-prototypes -Wno-format-security -Wno-trigraphs 
-Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations 
-Wmissing-prototypes -Wframe-larger-than=1024 -Wno-main -Wno-dangling-pointer 
-Wvla -Wno-pointer-sign -Wcast-function-type -Wno-stringop-overflow 
-Wno-array-bounds -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 
-Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init 
-Wenum-conversion -Wextra -Wunused -Wno-unused-but-set-variable 
-Wno-unused-const-variable -Wno-packed-not-aligned -Wno-format-overflow 
-Wno-format-truncation -Wno-stringop-truncation -Wno-override-init 
-Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value 
-Wno-maybe-uninitialized -Wno-sign-compare -Wno-unused-parameter -g -gdwarf-5  
-fsanitize=bounds-strict -fsanitize=shift -fsanitize=bool -fsanitize=enum  
-fsanitize=signed-integer-overflow  -DMODULE  
-DKBUILD_BASENAME='"dm_writeboost_daemon"' -DKBUILD_MODNAME='"dm_writeboost"' 
-D__KBUILD_MODNAME=kmod_dm_writeboost -c -o dm-writeboost-daemon.o 
dm-writeboost-daemon.c   ; 
/usr/src/linux-headers-6.14.0-15-generic/tools/objtool/objtool 
--hacks=jump_label --hacks=noinstr --hacks=skylake --retpoline --rethunk --sls 
--stackval --static-call --uaccess --prefix=16   --module dm-writeboost-daemon.o
dm-writeboost-target.c: In function ‘writeboost_io_hints’:
dm-writeboost-target.c:1903:9: error: implicit declaration of function 
‘blk_limits_io_opt’ [-Werror=implicit-function-declaration]
 1903 |         blk_limits_io_opt(limits, 4096);
      |         ^~~~~~~~~~~~~~~~~
# cmd_gen_objtooldep dm-writeboost-daemon.o
   { echo ; echo 'dm-writeboost-daemon.o: $(wildcard 
/usr/src/linux-headers-6.14.0-15-generic/tools/objtool/objtool)' ; } >> 
./.dm-writeboost-daemon.o.cmd
# cmd_gen_symversions_c dm-writeboost-daemon.o
  if nm dm-writeboost-daemon.o 2>/dev/null | grep -q ' __export_symbol_'; then  
nm dm-writeboost-daemon.o | sed -n 's/.* __export_symbol_\(.*\)//p' | 
/usr/src/linux-headers-6.14.0-15-generic/scripts/gendwarfksyms/gendwarfksyms   
dm-writeboost-daemon.o >> ./.dm-writeboost-daemon.o.cmd; fi
# cmd_gen_objtooldep dm-writeboost-metadata.o
   { echo ; echo 'dm-writeboost-metadata.o: $(wildcard 
/usr/src/linux-headers-6.14.0-15-generic/tools/objtool/objtool)' ; } >> 
./.dm-writeboost-metadata.o.cmd
# cmd_gen_symversions_c dm-writeboost-metadata.o
  if nm dm-writeboost-metadata.o 2>/dev/null | grep -q ' __export_symbol_'; 
then  nm dm-writeboost-metadata.o | sed -n 's/.* __export_symbol_\(.*\)//p' | 
/usr/src/linux-headers-6.14.0-15-generic/scripts/gendwarfksyms/gendwarfksyms   
dm-writeboost-metadata.o >> ./.dm-writeboost-metadata.o.cmd; fi
cc1: some warnings being treated as errors
make[4]: *** 
[/usr/src/linux-headers-6.14.0-15-generic/scripts/Makefile.build:207: 
dm-writeboost-target.o] Error 1
make[3]: *** [/usr/src/linux-headers-6.14.0-15-generic/Makefile:1999: .] Error 2
make[2]: *** [/usr/src/linux-headers-6.14.0-15-generic/Makefile:251: 
__sub-make] Error 2
make[2]: Leaving directory '/var/lib/dkms/dm-writeboost/2.2.16/build'
make[1]: *** [Makefile:251: __sub-make] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-6.14.0-15-generic'
make: *** [Makefile:11: all] Error 2


[ Test case ]

Install the latest linux-6.14 kernel on Noble:

$ sudo add-apt-repository ppa:canonical-kernel-team/ppa
$ sudo apt install linux-generic-hwe-24.04-wip

Install broadcom-sta-dkms:

$ sudo apt install dm-writeboost-dkms

Load the modules:

$ sudo modprobe

The same procedure can be repeated on linux-6.8 to test for possible
regressions.

[ Fix ]

Apply patches from dm-writeboost-dkms Plucky release enabling 6.14

* debian/patches/

[ Regression potential ]

We may experience regressions in systems that are using the dm-
writeboost drivers, especially with kernels >= 6.8 kernel.

** Affects: dm-writeboost (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: dm-writeboost (Ubuntu Noble)
     Importance: Undecided
     Assignee: John Cabaj (john-cabaj)
         Status: In Progress

** Also affects: dm-writeboost (Ubuntu Noble)
   Importance: Undecided
       Status: New

** Changed in: dm-writeboost (Ubuntu Noble)
       Status: New => In Progress

** Changed in: dm-writeboost (Ubuntu Noble)
     Assignee: (unassigned) => John Cabaj (john-cabaj)

-- 
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2110936

Title:
  dm-writeboost-dkms FTBS in Noble with the linux-6.14-hwe kernel

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