Al Viro c281a6c1ac x86: switch 32bit csum_and_copy_to_user() to user_access_{begin,end}()
consolidate HAVE_CSUM_COPY_USER for 32bit and 64bit, while are at it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-05-29 16:11:48 -04:00
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