linux-kernel - linux-next: build failure after merge of the char-misc tree

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Message-ID: <20250501164501.0fc0ab68@canb.auug.org.au>
Date: Thu, 1 May 2025 16:45:01 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Greg KH <greg@...ah.com>, Arnd Bergmann <arnd@...db.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Thadeu Lima de Souza
 Cascardo <cascardo@...lia.com>, Linux Kernel Mailing List
 <linux-kernel@...r.kernel.org>, Linux Next Mailing List
 <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the char-misc tree

Hi all,

After merging the char-misc tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

ld: warning: discarding dynamic section .glink
ld: warning: discarding dynamic section .plt
ld: linkage table error against `__kunit_do_failed_assertion'
ld: stubs don't match calculated size
ld: can not build stubs: bad value
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_duplicate_minor':
misc_minor_kunit.c:(.text+0x180): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.text+0x1e4): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.text+0x240): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_twice':
misc_minor_kunit.c:(.text+0x3e8): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.text+0x458): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o:misc_minor_kunit.c:(.text+0x4c4): more undefined references to `__kunit_do_failed_assertion' follow
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_find_minors':
misc_minor_kunit.c:(.text+0xb3c): undefined reference to `kunit_log_append'
ld: misc_minor_kunit.c:(.text+0xbac): undefined reference to `kunit_log_append'
ld: misc_minor_kunit.c:(.text+0xc1c): undefined reference to `kunit_log_append'
ld: misc_minor_kunit.c:(.text+0xc88): undefined reference to `kunit_log_append'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_duplicate_name':
misc_minor_kunit.c:(.text+0xee4): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.text+0xf40): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.text+0xf90): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_duplicate_error':
misc_minor_kunit.c:(.text+0x11b4): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.text+0x1210): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o:misc_minor_kunit.c:(.text+0x1264): more undefined references to `__kunit_do_failed_assertion' follow
ld: drivers/misc/misc_minor_kunit.o:(.toc+0x0): undefined reference to `kunit_binary_assert_format'
ld: drivers/misc/misc_minor_kunit.o:(.toc+0x8): undefined reference to `kunit_fail_assert_format'
ld: drivers/misc/misc_minor_kunit.o:(.toc+0x10): undefined reference to `kunit_unary_assert_format'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_can_open':
misc_minor_kunit.c:(.init.text+0xc0): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x134): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_static_basic':
misc_minor_kunit.c:(.init.text+0x25c): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x2b4): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_conflict_reverse':
misc_minor_kunit.c:(.init.text+0x408): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x414): undefined reference to `__kunit_abort'
ld: misc_minor_kunit.c:(.init.text+0x46c): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x4d8): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x530): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x590): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x5e4): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o:misc_minor_kunit.c:(.init.text+0x63c): more undefined references to `__kunit_do_failed_assertion' follow
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_conflict':
misc_minor_kunit.c:(.init.text+0x7a0): undefined reference to `__kunit_abort'
ld: misc_minor_kunit.c:(.init.text+0x7f8): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x85c): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_dynamic_basic':
misc_minor_kunit.c:(.init.text+0x994): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x9ec): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_collision_reverse':
misc_minor_kunit.c:(.init.text+0xb20): undefined reference to `kunit_kmalloc_array'
ld: misc_minor_kunit.c:(.init.text+0xba8): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0xc00): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0xc64): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0xcc0): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_collision':
misc_minor_kunit.c:(.init.text+0xe30): undefined reference to `kunit_kmalloc_array'
ld: misc_minor_kunit.c:(.init.text+0xe98): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0xea4): undefined reference to `__kunit_abort'
ld: misc_minor_kunit.c:(.init.text+0xf04): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0xfac): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x1058): undefined reference to `__kunit_do_failed_assertion'
ld: drivers/misc/misc_minor_kunit.o: in function `miscdev_test_dynamic_only_range':
misc_minor_kunit.c:(.init.text+0x1174): undefined reference to `kunit_kmalloc_array'
ld: misc_minor_kunit.c:(.init.text+0x1200): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x1248): undefined reference to `__kunit_do_failed_assertion'
ld: misc_minor_kunit.c:(.init.text+0x12ec): undefined reference to `__kunit_do_failed_assertion'

Caused by commit

  20acf4dd46e4 ("char: misc: make miscdevice unit test built-in only")

$ grep CONFIG_KUNIT .config
CONFIG_KUNIT=m
CONFIG_KUNIT_DEBUGFS=y
CONFIG_KUNIT_FAULT_TEST=y
CONFIG_KUNIT_TEST=m
CONFIG_KUNIT_EXAMPLE_TEST=m
CONFIG_KUNIT_ALL_TESTS=m
CONFIG_KUNIT_DEFAULT_ENABLED=y
CONFIG_KUNIT_AUTORUN_ENABLED=y
$ grep CONFIG_TEST_MINOR .config
$ 

I have used the char-misc tree from next-20250428 again.

-- 
Cheers,
Stephen Rothwell

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