• Al Viro's avatar
    unify generic instances of csum_partial_copy_nocheck() · 6e41c585
    Al Viro authored
    quite a few architectures have the same csum_partial_copy_nocheck() -
    simply memcpy() the data and then return the csum of the copy.
    
    hexagon, parisc, ia64, s390, um: explicitly spelled out that way.
    
    arc, arm64, csky, h8300, m68k/nommu, microblaze, mips/GENERIC_CSUM, nds32,
    nios2, openrisc, riscv, unicore32: end up picking the same thing spelled
    out in lib/checksum.h (with varying amounts of perversions along the way).
    
    everybody else (alpha, arm, c6x, m68k/mmu, mips/!GENERIC_CSUM, powerpc,
    sh, sparc, x86, xtensa) have non-generic variants.  For all except c6x
    the declaration is in their asm/checksum.h.  c6x uses the wrapper
    from asm-generic/checksum.h that would normally lead to the lib/checksum.h
    instance, but in case of c6x we end up using an asm function from arch/c6x
    instead.
    
    Screw that mess - have architectures with private instances define
    _HAVE_ARCH_CSUM_AND_COPY in their asm/checksum.h and have the default
    one right in net/checksum.h conditional on _HAVE_ARCH_CSUM_AND_COPY
    *not* defined.
    Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    6e41c585
checksum.h 3.47 KB