On 6/24/22 17:52, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@xxxxxxxx> > > All architecture-independent users of virt_to_bus() and bus_to_virt() > have been fixed to use the dma mapping interfaces or have been > removed now. This means the definitions on most architectures, and the > CONFIG_VIRT_TO_BUS symbol are now obsolete and can be removed. > > The only exceptions to this are a few network and scsi drivers for m68k > Amiga and VME machines and ppc32 Macintosh. These drivers work correctly > with the old interfaces and are probably not worth changing. > > On alpha and parisc, virt_to_bus() were still used in asm/floppy.h. > alpha can use isa_virt_to_bus() like x86 does, and parisc can just > open-code the virt_to_phys() here, as this is architecture specific > code. > > I tried updating the bus-virt-phys-mapping.rst documentation, which > started as an email from Linus to explain some details of the Linux-2.0 > driver interfaces. The bits about virt_to_bus() were declared obsolete > backin 2000, and the rest is not all that relevant any more, so in the > end I just decided to remove the file completely. > > Reviewed-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> > Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> > Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> (powerpc) > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Thanks for this cleanup! You may add: Acked-by: Helge Deller <deller@xxxxxx> # parisc Helge > --- > .../core-api/bus-virt-phys-mapping.rst | 220 ------------------ > Documentation/core-api/dma-api-howto.rst | 14 -- > Documentation/core-api/index.rst | 1 - > .../translations/zh_CN/core-api/index.rst | 1 - > arch/alpha/Kconfig | 1 - > arch/alpha/include/asm/floppy.h | 2 +- > arch/alpha/include/asm/io.h | 8 +- > arch/ia64/Kconfig | 1 - > arch/ia64/include/asm/io.h | 8 - > arch/m68k/Kconfig | 1 - > arch/m68k/include/asm/virtconvert.h | 4 +- > arch/microblaze/Kconfig | 1 - > arch/microblaze/include/asm/io.h | 2 - > arch/mips/Kconfig | 1 - > arch/mips/include/asm/io.h | 9 - > arch/parisc/Kconfig | 1 - > arch/parisc/include/asm/floppy.h | 4 +- > arch/parisc/include/asm/io.h | 2 - > arch/powerpc/Kconfig | 1 - > arch/powerpc/include/asm/io.h | 2 - > arch/riscv/include/asm/page.h | 1 - > arch/x86/Kconfig | 1 - > arch/x86/include/asm/io.h | 9 - > arch/xtensa/Kconfig | 1 - > arch/xtensa/include/asm/io.h | 3 - > include/asm-generic/io.h | 14 -- > mm/Kconfig | 8 - > 27 files changed, 10 insertions(+), 311 deletions(-) > delete mode 100644 Documentation/core-api/bus-virt-phys-mapping.rst
