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[ Upstream commit98f3ab18a0] When GENERIC_IRQ_CHIP is disabled, OMAP1 kernels fail to link: arm-linux-gnueabi-ld: arch/arm/mach-omap1/irq.o: in function `omap1_init_irq': irq.c:(.init.text+0x1e8): undefined reference to `irq_alloc_generic_chip' arm-linux-gnueabi-ld: irq.c:(.init.text+0x228): undefined reference to `irq_setup_generic_chip' arm-linux-gnueabi-ld: irq.c:(.init.text+0x2a8): undefined reference to `irq_gc_set_wake' arm-linux-gnueabi-ld: irq.c:(.init.text+0x2b0): undefined reference to `irq_gc_mask_set_bit' arm-linux-gnueabi-ld: irq.c:(.init.text+0x2b4): undefined reference to `irq_gc_mask_clr_bit' This has apparently been the case for many years, but I never caught it in randconfig builds until now, as there are dozens of other drivers that also 'select GENERIC_IRQ_CHIP' and statistically there is almost always one of them enabled. Fixes:55b4477443("ARM: OMAP1: Switch to use generic irqchip in preparation for sparse IRQ") Link: https://lore.kernel.org/r/20250205121151.289535-1-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sasha Levin <sashal@kernel.org>