Defined in 3 files as a macro:

• arch/loongarch/include/asm/barrier.h, line 24 (as a macro)
• arch/m68k/include/asm/dvma.h, line 24 (as a macro)
• arch/x86/include/asm/dma-mapping.h, line 24 (as a macro)

Referenced in 4 files:

• arch/arm64/boot/dts/broadcom/bcmbca/bcm963158.dts, line 431
• arch/m68k/include/asm/dvma.h, line 25
• drivers/scsi/sun3_scsi.c, line 231
• kernel/printk/printk_ringbuffer.c, line 427