diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2020-07-22 22:14:36 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-08-20 15:45:14 -0400 |
| commit | 6e41c585e38ff696de3a11509a0ad0a11150b0c3 (patch) | |
| tree | 6af77b846b7523063a645913fa6a2c6563beb238 /lib/iov_iter.c | |
| parent | 3ea7ca80d9c0ff606b5a129dce2354f771a9e4e8 (diff) | |
unify generic instances of csum_partial_copy_nocheck()
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: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'lib/iov_iter.c')
0 files changed, 0 insertions, 0 deletions