iov_iter: Turn iov_iter_fault_in_readable into fault_in_iov_iter_readable

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Turn iov_iter_fault_in_readable into a function that returns the number
of bytes not faulted in, similar to copy_to_user, instead of returning a
non-zero value when any of the requested pages couldn't be faulted in.
This supports the existing users that require all pages to be faulted in
as well as new users that are happy if any pages can be faulted in.

Rename iov_iter_fault_in_readable to fault_in_iov_iter_readable to make
sure this change doesn't silently break things.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

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This commit is contained in:

Andreas Gruenbacher 2021-08-02 14:54:16 +02:00

parent bb523b406c

commit a6294593e8

9 changed files with 29 additions and 20 deletions

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lib/iov_iter.c

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