disable_dac_quirk 19 arch/x86/kernel/pci-dma.c static bool disable_dac_quirk __read_mostly; disable_dac_quirk 101 arch/x86/kernel/pci-dma.c disable_dac_quirk = true; disable_dac_quirk 155 arch/x86/kernel/pci-dma.c if (!disable_dac_quirk) {