[Bug 2134569] [NEW] rapiddisk-dkms FTBS in Noble with the linux-6.17 kernel

[Launchpad Bug Tracker]

You have been subscribed to a public bug by John Cabaj (john-cabaj):

[ Impact ]

DKMS make.log for rapiddisk-dkms-9.1.0 for kernel 6.17.0-7-generic (x86_64)
Tue Dec  9 23:00:44 UTC 2025
make: Entering directory '/usr/src/linux-headers-6.17.0-7-generic'
make[1]: Entering directory '/var/lib/dkms/rapiddisk-dkms/9.1.0/build'
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
  CC [M]  rapiddisk.o
  CC [M]  rapiddisk-cache.o
In file included from /usr/src/linux-headers-6.17.0-7-generic/include/linux/build_bug.h:5,
                 from /usr/src/linux-headers-6.17.0-7-generic/include/linux/init.h:5,
                 from rapiddisk.c:26:
rapiddisk.c: In function ‘rdsk_lookup_page’:
rapiddisk.c:252:28: error: ‘struct page’ has no member named ‘index’
  252 |         BUG_ON(page && page->index != idx);
      |                            ^~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/compiler.h:77:45: note: in definition of macro ‘unlikely’
   77 | # define unlikely(x)    __builtin_expect(!!(x), 0)
      |                                             ^
rapiddisk.c:252:9: note: in expansion of macro ‘BUG_ON’
  252 |         BUG_ON(page && page->index != idx);
      |         ^~~~~~
rapiddisk.c: In function ‘rdsk_insert_page’:
rapiddisk.c:288:13: error: ‘struct page’ has no member named ‘index’
  288 |         page->index = idx;
      |             ^~
rapiddisk.c:293:28: error: ‘struct page’ has no member named ‘index’
  293 |                 BUG_ON(page->index != idx);
      |                            ^~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/compiler.h:77:45: note: in definition of macro ‘unlikely’
   77 | # define unlikely(x)    __builtin_expect(!!(x), 0)
      |                                             ^
rapiddisk.c:293:17: note: in expansion of macro ‘BUG_ON’
  293 |                 BUG_ON(page->index != idx);
      |                 ^~~~~~
rapiddisk.c: In function ‘rdsk_free_pages’:
rapiddisk.c:332:40: error: ‘struct page’ has no member named ‘index’
  332 |                         BUG_ON(pages[i]->index < pos);
      |                                        ^~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/compiler.h:77:45: note: in definition of macro ‘unlikely’
   77 | # define unlikely(x)    __builtin_expect(!!(x), 0)
      |                                             ^
rapiddisk.c:332:25: note: in expansion of macro ‘BUG_ON’
  332 |                         BUG_ON(pages[i]->index < pos);
      |                         ^~~~~~
rapiddisk.c:333:39: error: ‘struct page’ has no member named ‘index’
  333 |                         pos = pages[i]->index;
      |                                       ^~
make[3]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:287: rapiddisk.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/usr/src/linux-headers-6.17.0-7-generic/Makefile:2016: .] Error 2
make[1]: *** [/usr/src/linux-headers-6.17.0-7-generic/Makefile:248: __sub-make] Error 2
make[1]: Leaving directory '/var/lib/dkms/rapiddisk-dkms/9.1.0/build'
make: *** [Makefile:248: __sub-make] Error 2
make: Leaving directory '/usr/src/linux-headers-6.17.0-7-generic'

[ Test case ]

Install the latest linux-6.17 kernel on Noble:

$ sudo add-apt-repository ppa:canonical-kernel-team/ppa3
$ sudo apt install linux-generic-hwe-24.04-edge

Install rapiddisk-dkms:

$ sudo apt install rapiddisk-dkms

Modules built and installed successfully.

Load the modules:

$ sudo modprobe rapiddisk
$ sudo modprobe rapiddisk-cache

Modules loaded successfully.

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

Install the latest kernel on Questing and Resolute:

Install rapiddisk-dkms:

$ sudo apt install rapiddisk-dkms

Modules built and installed successfully.

Load the modules:

$ sudo modprobe rapiddisk
$ sudo modprobe rapiddisk-cache.

Modules loaded successfully.

[ Fix ]

Custom patch from rapiddisk (https://github.com/pkoutoupis/rapiddisk/):

-debian/patches/0001-Page-struct-no-longer-has-index-member-so-
switching-.patch

[ Regression potential ]

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

** Affects: rapiddisk (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: rapiddisk (Ubuntu Noble)
     Importance: Undecided
         Status: New

** Affects: rapiddisk (Ubuntu Questing)
     Importance: Undecided
         Status: New

** Affects: rapiddisk (Ubuntu Resolute)
     Importance: Undecided
         Status: New

-- 
rapiddisk-dkms FTBS in Noble with the linux-6.17 kernel
https://bugs.launchpad.net/bugs/2134569
You received this bug notification because you are a member of Ubuntu Sponsors, which is subscribed to the bug report.