Hi All, The latest mainline kernel branch fails to build for mips tb0226_defconfig with the error: mipsel-linux-ld: arch/mips/pci/fixup-tb0226.o: in function `pcibios_map_irq': fixup-tb0226.c:(.text+0x38): undefined reference to `vr41xx_set_irq_trigger' mipsel-linux-ld: fixup-tb0226.c:(.text+0x44): undefined reference to `vr41xx_set_irq_level' mipsel-linux-ld: fixup-tb0226.c:(.text+0x64): undefined reference to `vr41xx_set_irq_trigger' mipsel-linux-ld: fixup-tb0226.c:(.text+0x70): undefined reference to `vr41xx_set_irq_level' mipsel-linux-ld: fixup-tb0226.c:(.text+0xb0): undefined reference to `vr41xx_set_irq_trigger' mipsel-linux-ld: fixup-tb0226.c:(.text+0xbc): undefined reference to `vr41xx_set_irq_level' mipsel-linux-ld: fixup-tb0226.c:(.text+0xd4): undefined reference to `vr41xx_set_irq_trigger' mipsel-linux-ld: fixup-tb0226.c:(.text+0xe0): undefined reference to `vr41xx_set_irq_level' mipsel-linux-ld: fixup-tb0226.c:(.text+0xf4): undefined reference to `vr41xx_set_irq_trigger' mipsel-linux-ld: fixup-tb0226.c:(.text+0x100): undefined reference to `vr41xx_set_irq_level' git bisect pointed to c4371c563973 ("gpio: remove VR41XX related gpio driver") And, reverting that commit has fixed the build failure. I will be happy to test any patch or provide any extra log if needed. -- Regards Sudip