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linux/include/linux/seqlock.h
Heiko Carstens 88331c4ec2 seqlock: Allow UBSAN_ALIGNMENT to fail optimizing 
With gcc-15 and gcc-16 with UBSAN_ALIGNMENT enabled the compiler fails to
inline and optimize __scoped_seqlock_bug() away on s390:

s390x-16.1.0-ld: kernel/sched/build_policy.o: in function `__scoped_seqlock_next':
/.../seqlock.h:1286:(.text+0x22030): undefined reference to `__scoped_seqlock_bug'

Fix this by adding UBSAN_ALIGNMENT to the list of config options where a
not inlined empty __scoped_seqlock_bug() is allowed.

Closes: https://lore.kernel.org/r/20260515092057.810542-1-arnd@kernel.org/
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260519110315.1385307-1-hca@linux.ibm.com
2026-05-28 12:23:22 +02:00

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