csum_and_copy_..._user(): pass 0xffffffff instead of 0 as initial sum

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Preparation for the change of calling conventions; right now all
callers pass 0 as initial sum.  Passing 0xffffffff instead yields
the values comparable mod 0xffff and guarantees that 0 will not
be returned on success.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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Al Viro 2020-07-11 23:51:04 -04:00

parent cc44c17baf

commit 99a2c96d52

1 changed files with 3 additions and 3 deletions

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lib/iov_iter.c

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