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Commitfbb22ceaaf("powerpc/irq: Make irqstats array based") made arch_show_interrupts() call irq_proc_emit_counts(). That function lives in kernel/irq/proc.c, which is only built with CONFIG_PROC_FS, so kernels without procfs no longer link: powerpc64-linux-ld: arch/powerpc/kernel/irq.o: in function `arch_show_interrupts': arch/powerpc/kernel/irq.c:134:(.text+0x4b8c): undefined reference to `irq_proc_emit_counts' arch_show_interrupts() is only called from irq_seq_show(), which is in kernel/irq/proc.c as well, so build it only with CONFIG_PROC_FS, as x86 already does. Fixes:fbb22ceaaf("powerpc/irq: Make irqstats array based") Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202609271531.8kf2NTjK-lkp@intel.com/ Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>