openrisc: fix copy_from_user()

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... that should zero on faults.  Also remove the <censored> helpful
logics wrt range truncation copied from ppc32.  Where it had ever
been needed only in case of copy_from_user() *and* had not been merged
into the mainline until a month after the need had disappeared.
A decade before openrisc went into mainline, I might add...

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

...

This commit is contained in:

Al Viro 2016-08-20 17:05:21 -04:00

parent 2e29f50ad5

commit acb2505d01

1 changed files with 11 additions and 24 deletions

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33

arch/openrisc/include/asm/uaccess.h

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