x86_64: csum_..._copy_..._user(): switch to unsafe_..._user()

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We already have stac/clac pair around the calls of csum_partial_copy_generic().
Stretch that area back, so that it covers the preceding loop (and convert
the loop body from __{get,put}_user() to unsafe_{get,put}_user()).
That brings the beginning of the areas to the earlier access_ok(),
which allows to convert them into user_access_{begin,end}() ones.

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

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Al Viro 2020-02-16 14:56:36 -05:00

parent 2a89b674fd

commit 73e800ecb6

1 changed files with 12 additions and 11 deletions

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arch/x86/lib/csum-wrappers_64.c

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